Los Alamos Technical Reports This file lists the Los Alamos Technical Reports numbered LA-1 through LA-999 in the Los Alamos Library online catalog. The text of many of these reports are available online. Access the Los Alamos Library catalog at http://library.lanl.gov/. Click on "Library Catalog". Compiled by Gregory Walker, trinatomic@earthlink.net. For more information on nuclear weapons, visit Trinity Atomic Web Site at http://www.abomb1.org/ LA-1 The Los Alamos primer : the first lectures on how to build an atomic bomb LA-1 A Los Alamos primer LA-3 Experimental program notes (from discussions on 4/21-24/43) LA-5 Integral diffusion problems LA-6 Theoretical group organization LA-7 Theoretical group program LA-8 Integral treatment of neutron diffusion LA-9 Range measurements of 94[sup 239], 94[sup 238] and U[sup 233] LA-10 The exponential shock and rarefaction waves LA-11 Los Alamos handbook of nuclear physics LA-12 The Range of deuterons in heavy water and of proton in hydrogen LA-12-R The Range of deuterons in heavy water and of proton in hydrogen LA-13 Piling up of counts LA-14 The exponential shock and rarefaction waves LA-15 Estimation of small quantities of uranium in thorium LA-16 Capture cross sections for 240 Kev neutrons of gold, rhenium and uranium LA-17 Fission spectrum LA-18 The collapse of hollow steel cylinders by high explosives LA-19 The use of thorium as a threshold detector for fast neutrons LA-20 High-density alloys of rare earths LA-21 Fission cross section of 94[sup 239] for 220 Kev neutrons and Ra plus Be neutrons LA-23 One-dimensional motion of a detonated explosive LA-25 Measurements of [nu][sub 49]/[nu][sub 25] LA-27 Preparation and properties of some gold alloys LA-28 Measurements on [sigma][sub f](49)/[sigma][sub f](25) and the value of [sigma][sub f] as a function of neutron energy LA-31 The multiplication rate for untamped cylinders LA-33 Preparation of compacts of high-density uranium hydride LA-35 Progress report on metal reduction, October 1943 LA-37 The Formation of uranium hydride LA-38 The Production of slow neutrons in a carbon block LA-39 Measurements of [alpha][sub f](02)/[alpha][sub f](28) and the value of [alpha][sub f](02) as a function of neutron energy LA-40 Progress report on metal reduction, November 1943 LA-42 Uranium alloy development LA-44 Uranium alloy development, Part 2 LA-45 Geometrical formulas for experiments on single scattering LA-46 A comparison of boron and 25 fission cross-section for neutrons of energies from thermal to 3 Mev LA-47 Critical size and multiplication number for untamped rectangular block by variation method LA-48 The Neutron spectrum of boron bombarded by polonium-alphas LA-49 The Modification of the spectrum of D-D neutrons by passage through 5 [inches] of tuballoy LA-52 RaD purification, Po preparation, and calibration of measuring apparatus LA-53 METHODS OF TREATMENT OF DISPLACEMENT INTEGRAL EQUATIONS LA-53-A Methods of treatment of displacement integral equations : recipe book LA-54 Progress report on metal reduction, December 1943 LA-55 Uranium alloy development, Part III LA-56 A Method of making thin uranium oxide films on platiunum foils LA-58 The determination of the oxygen content of metals by the carbon monoxide method LA-60 The Fission neutron spectrum of 25 LA-61 Progress report on metal reduction, January 1944 LA-62 The Transport cross section of helium for fast neutrons LA-63 Ultramicrochemical investigation of the solubilities of some plutonium compounds LA-64 Stopping power of various substances for fission fragments LA-65 Characteristics of metal type electron-multiplier tube LA-66 The energies of the neutrons from polonium alphas on boron LA-67 Progress report on reduction by electrolysis LA-68 Uranium alloy development, Part 4 LA-69 Uranium alloy development, Part 5 LA-71 A spectrographic method for the determination of fluorine LA-72 Polonium extraction using a platinum electrode and hydrogen LA-73 The Multiple-wire proportional counter (the M. W. counter) LA-74 Investigation of proportional counters LA-75 Purification of plutonium LA-76 Delayed neutrons from 49 LA-78 Uranium alloy development, Part VI : uranium-moly- bdenum alloys LA-79 Metallography of plutonium LA-81 Inelastic scattering in uranium LA-82 Fission cross section of 25 for 0.01 to 1000 eV neutrons LA-84 Fission neutron spectra of 25 and 49 LA-85 Po alphas on BF[sub 3] as a mock fission neutron source LA-86 Spontaneous fission in separated uranium isotopes LA-87 Long range alpha particles emitted in connection with fission : preliminary report, May 18, 1944 LA-88 Application of microwaves to interior ballistic measurements LA-89 The preparation of thin films of thorium oxide LA-91 Measurements on the cross-section of 49 as a function of neutron energy in the range from 0.01 eV to 3.0 eV LA-92 Boron cross-section for neutrons from 0.01 to 1000 eV LA-93 Gold cross section for neutrons from 0.01 to 0.3 eV LA-95 The preparation of thin boron films LA-96 Uranium alloy development, Part VII : uranium alloys with two atomic per cent of some rare and precious metals LA-97 Some remarks on the hydrodynamical theory of wave propagation with an application to a problem in the flow of metals incompressible at low pressures LA-98 Determination of rare earth elements in uranium compounds LA-99 Oscilloscope sweep circuit and delay line for the study of transients LA-100 Fission and radiative capture cross section of 25 for thermal neutrons LA-101 Statistical fluctuations in the water boiler and the dispersion of neutrons emitted per fission LA-102 Number of neutrons per fission for 25 and 49 LA-103 The ratio of the fission cross sections of 49 and 25 for thermal neutrons and dthe ration [1 + [alpha](49)]/[1 + [alpha](25)] LA-104 Neutrons per fission from 49 compared with 25 : slightly delayed neutron from 49 and 25 LA-105 Tamper tests on water boiler LA-107 Note on a use of delay lines in counter pulse amplifiers LA-108 Boron trifluoride neutron detector for low neutron intensities LA-110 Lead sphere integral experiment LA-111 Energy spectrum of Po-Be neutrons LA-112 The preparation of plutonium trichloride LA-114 Pulse height analyzer - model A LA-115 Time of collection of electrons inionization chambers LA-116 The preparation of plutonium tribromide LA-117 Capture cross section of gold as a function of neutron energy LA-120 The equation of state of hydrogen from one to a million atmospheres pressure LA-121 Operation of proportional counters at pressures above atmospheric LA-122 Vapor pressure of plutonium trichloride LA-123 Spherical proportional counter LA-124 The preparation of plutonium metal on the one-gram scale by means of the graphite centrifuge LA-126 Radiation hazards connected with the controlled hydride explosion LA-127 The consolidation of boron LA-128 Absolute values of the fission cross sections of 25 and 28 from 0.28 to 2.50 Mev LA-129 Efficiencies of neutron counters using recoils of protons in argon and xenon LA-132 Construction and operation of pulsed counter tubes LA-134 Water boiler LA-136 Thick-target excitation functions for alpha particles LA-137 Plutonium hydride and deuteride LA-138 Equations of state of helium, argon and xenon up to a megabar pressure LA-139 The preparation of plutonium metal by the reduction of the oxide with graphite LA-141 Recovery and purification of plutonium LA-142 An equation of state in the condensed phase for arbitrary pressures and moderate temperatures LA-144 Effect of anisotropic scattering on critical-mass calculations LA-145 The x-ray spectra of the last-row elements LA-147 Production of uranium by electrolysis of fused salts LA-148 Production of plutonium by electrolysis LA-149 Preparation of UF[sub 6] for isotopic analysis LA-150 The cross sections for fission of 25, 49, 28, 11, 37, 00, 02, B and Li LA-151 Plastic bonding of boron powder LA-152 Distribution and power measurements in the water boiler LA-153 Determination of oxygen by the vacuum fusion method LA-154 Some observations on the basic chemistry of plutonium LA-156 Ionization chamber and electronic equipment for the observation of the shape of one microsecond x-ray pulses LA-158 Further measurements of the fission and absorption cross sections of 25 below 1000 Ev LA-159 Production of uranium tetrafluoride on a 200-gram scale LA-160 Experimental determination of the diffusion length for C neutrons in BeO LA-163 Measurement of [gamma][sub f](28), [gamma][sub f](25)/[gamma][sub f](28) and [gamma][sub f](49)/[gamma][sub f](25) at 2.5 and 3 Mev LA-165 Shock hydrodynamics LA-166 A recoil proportional counter LA-168 Isotopic constitution of plutonium : I LA-169 Study of the scattering of 25 LA-170 Investigation of fission gamma rays LA-171 Theory of multiplicative processes : I LA-172 Decomposition products of plutonyl nitrate and plutonium oxalate LA-173 Formula for the critical radius for one velocity LA-174 The spherical-harmonic method and its application to one-velocity neutron problems LA-175 Plutonium recovery methods LA-176 Measurement of weak neutron intensities by Szilard-Chalmers reaction in calcium permanganate solution LA-179 Capture cross section of U[sup 238] for neutrons of various energies LA-180 Uranium alloy development, Part VIII : compression and tension tests on uranium and some uranium-mol- ybdenum alloys LA-181 Tuballoy grain-size standards LA-182 Contact electrical method of studying implosion LA-183 Criticality of the water boiler, number of delayed neutrons, and dispersion of the neutron emission per fission LA-183A Criticality of the water boiler, number of delayed neutrons, and despersion of the neutron emission per fission LA-184 Primacord velocity measurements LA-185 The ratio of [nu]23/[nu]25 : slightly delayed neutrons from 23 LA-188 Fission cross section of 23 from 30 Kev to 3 Mev LA-189 Multiplication of fission neutrons in a sphere of 25 LA-190 Relative fission cross section of 23 for neutrons in the range .025 to 100 ev LA-191 Multiplication of a 2-1/2 inch 25 sphere as measured with 28 and 25 fission detectors LA-193 Large-scale preparation of the anhydrous fluorides of plutonium LA-195 Formation of jets in plane slabs LA-197 Theory of an untamped subcritical sphere with a surface source LA-198 Production of hemispheres of uranium and 25 by hot pressing LA-200 Neutron spectrum for fast fission of 25 LA-201 Compact mock fission neutron sources LA-202 Termination of primacord with pressed-PETN gilding-metal caps LA-203 Half-life of 24. I. mass-spectrographic studies of normal tuballoy LA-204 Flotation of uranium oxides LA-205 Comparison of the variation-theory and end-point results for tamped spheres LA-206 A simplified method for calculating critical sizes LA-207 Neutron absorption method for boron analysis LA-211 Radioactive threshold detectors for neutrons LA-213 Taylor's hydrodynamics of strong shocks applied to gases having small values of [gamma]-1 LA-214 Effect of voids on detonation waves LA-215 Gravity waves in water caused by explosions LA-217 Use of gadget in rain or fog LA-221 Propagation of detonation waves along the LA-222 Theory of neutron counters using proton recoils from paraffin LA-223 Quasi-stationary field in a moving conductor with applications to collapsing spherical shells LA-224 Primacord branching LA-225 Preparation of a compact radioyttrium gamma-ray source LA-226 Half-life of 24. II. studies of enriched materials LA-228 Gravity waves generated by the creation of a cylindrical cavity in water LA-229 Opacity of air, BeO, C, Fe, and U at high temperatures LA-231 Delayed neutrons from 49 LA-232 The fission cross section of 37 LA-233 Hot pressing of solid plutonium hemispheres LA-234 A graphical representation of critical masses and multiplication rates LA-236 Dynamics of a mass of hot gas rising in air LA-237 Microdetermination of azide by a Kjeldahl procedure LA-240 A report on the hyperfine structure in the arc spectrum of tuballoy LA-241 Water tamper measurements LA-242 The similarity solution for a convergent spherical shock wave near zero radius LA-243 Scattering properties of boron LA-247 Multi-medium critical-mass problem LA-251 Effect of reaction zone on detonation velocity LA-252 Delayed neutrons from 25 after short irradiation LA-253 Short-period delayed gammas from fission of 25 LA-256 Total cross sections of U, H and C from 35 to 500 Kev LA-257 Distribution arising from a point source of fast neutrons between two slowing-down media LA-258 The mathematical development of the end-point method LA-259 Condenser-microphone method of studying motion of conducting surfaces LA-260 Energy of inelastically scattered neutrons in a large mass of tuballoy LA-262 Effect of variable entropy in the theory of spherically convergent detonation waves LA-266 Absorption and fission cross sections of 49 in the neutron energy range 0.01 ev to 100 ev LA-267 Multiplication of neutrons in small spheres of active material LA-268 Treatment of anisotropic scattering by hydrogen in multiplying systems LA-269 Resonance autocatalysis LA-271 Effect of rigidity on shock waves in solids LA-272 Critical mass of a water-tamped 49 solution LA-274 Evaluation of scattering data LA-276 Capture and inelastic scattering in spheres of various metals. 1. transmission experiments with long counters 2. inelastic scattering of Y-Be neutrons LA-281 Recording dosimeters for one microsecond x-ray pulses LA-282 Radioactivity measurements at the 100-ton trial LA-282A 100-ton test : radiation above the crater after 41 days LA-283 100-ton-test : permanent earth movement; earth and air shocks LA-284 100-ton test : mechanical impulse meter LA-285 100 - ton test meteorological report LA-286 100-ton test : piezo gage measurements LA-287 100-ton test at Trinity : report on earth velocity measurements LA-288 100-ton test : box gauges for blast pressures LA-290 100-ton test : radiochemistry LA-291 100-ton test : measurement of the velocity of sound LA-292 The motion of earth thrown from small craters by explosive charges LA-295 Preparation of refractories of magnesium oxide LA-296 Opacity and thermodynamic properties of air at high temperatures LA-299 Stability of a steady plane shock LA-303 Spectrophotometric determination of sub-microgram amounts of boron LA-304 Integral experiments I : tamper reflection and distributions LA-304A BeO tamper reflections and distributions LA-306 Integral experiments III : comparison of U and WC for tampers LA-309 Summary of known critical masses of 25 and 49 LA-311 On the Milne problem for a large plane slab with constant source and anisotropic scattering LA-312 The 2 ev resonance in the absorption of 25 LA-313 Protection of uranium against atmospheric oxidation LA-314 Protection of plutonium against atmospheric oxidation LA-315 Determination of density from opacity measurements LA-316 Estimated blast pressures from TNT charges of 2 to 10,000 tons LA-318 Approximate treatment of exponential shock and rarefaction waves LA-327 Isotopic constitution of plutonium: II LA-331 Shock and material velocities in several metals and nonmetals LA-332 Theory of von Neumann's method of treating shocks LA-334 Transport phenomena in a mixture of electrons and nuclei LA-335 The definition of "neutron multiplication" LA-337 Slowing down of neutrons in air LA-340 Colorimetric determination of boron in plutonium metal LA-347 Calorimetric determination of the energy produced by 49 LA-350 July 16th shot : blast measurements with peak-pressure indicators LA-351 July 16th nuclear explosion : geophone measuremen- ts of earth motion LA-352 July 16th nuclear explosion : sound velocity and excess velocity of the shock wave LA-353 July 16th nuclear explosion : total radiation LA-354 July 16th nuclear explosion : box-gauge measurement of blast pressure LA-355 July 16th nuclear explosion : mechanical impulse gauge LA-357 July 16th nuclear explosion : meteorological report LA-358 July 16th nuclear explosion : soil correction, absorption of neutrons in soil, and time dependence of slow-neutron intensity LA-359 July 16th nuclear explosion : radiation survey of Trinity site four weeks after explosion LA-360 July 16th nuclear explosion : micro-barograph pressure measurement LA-362 July 16th nuclear explosion : neutron measurements with gold-foil detectors LA-364 July 16th nuclear explosion : incendiary effects of radiation LA-365 July 16th nuclear explosion : permanent earth displacement LA-365A July 16th nuclear explosion : examination of tower footing LA-366 July 16th nuclear explosion : blast measurements with condenser gauges LA-368 Boron-lead compacts LA-369 The disintegration cross section of netrogen for fast neutrons LA-373 Variation in [gamma](25) and [gamma](49) with energy of the incident neutrons LA-376 Determination of plutonium in human feces LA-380 Fabrication of plutonium foil by distillation of the metal LA-380R Fabrication of plutonium foil by distillation of the metal LA-381 Equilibrium constants and heats of reaction for the hydrofluorination of uranium dioxide and plutonium dioxide LA-383 Electronic timing methods for use in high-explosi- ve research LA-384 Pressure, compression, shock and particle-velocity measurements in the neighborhood of one-third megabar : progress report to August 15, 1945 LA-386 Spectrochemical analysis of plutonium and its compounds. I, the copper spark method LA-387 Spectrochemical analysis of plutonium and its compounds, II. Cupferron procedure LA-390 Confinement of an explosion by a steel vessel LA-391 Chemistry and metallurgy health handbook of radioactive materials LA-393-A Equation of state of a compressed metal according to the Thomas-Fermi-Dirac model LA-393A Equation of state of a compressed metal according to the Thomas-Fermi-Dirac model LA-394 High-power water boiler LA-395 Some factors affecting the cupferron extraction procedure for estimation of trace amounts of plutonium LA-396 Calibration of cadmium-covered gold foils in a graphite block LA-397 Controlled production of an explosive nuclear chain reaction LA-399 Theory of water-tamped water boiler LA-400 Absolute calibration of Ra-Be neutron source LA-402 Neutron multiplication in spheres of 25 LA-403-Del. Plutonium purification in building D LA-404 Chemical research : Building D plutonium purification LA-405 Purification processes : D-building plutonium purification LA-406 Building D plutonium purification : (summary of results) LA-407 Engineering development building "D" plutonium purification report LA-408 Building D plutonium purification : corrosion data LA-409 Building D plutonium purification : equipment drawings LA-412 Chemical and metallurgical operations involved in the fabrication of U-235 for use in nuclear weapons : Part 3. Reduction of uranium tetrafluor- ide to metal LA-414 Chemical and metallurgical operations involved in the fabrication of U-235 : Part 5. production of magnesia refractories for casting of Uranium-235 LA-416 Chemical and spectrochemical analysis of uranium and plutonium materials : manual of procedures LA-416-A Chemical and spectrochemical analysis of uranium and plutonium materials : manual of procedures LA-418 Detection of nuclear-explosion dust in the atmosphere LA-420 Spiral fission chambers LA-421 Neutron distributions in tamped 25 assemblies II : 4-1/2" core of 25 metal LA-425 Microgravimetric determination of gallium in plutonium-gallium alloys LA-427 Range of 25 fission fragments in photographic emulsion LA-429 Micro combustion method for the determination of carbon LA-430 July 16th nuclear explosion : attempt to obtain gamma-ray kinephotographs LA-431 July 16th nuclear explosion : measurement of maximum blast pressure near the center LA-433 July 16th nuclear explosion : measurement of delayed ionization by distant recording instruments LA-435 July 16th nuclear explosion : relay timing LA-436 July 16th nuclear explosion : fast electronic timing sequence LA-438 July 16th nuclear explosion : ground vibrations LA-439 100-ton test : ground vibrations LA-442 Critical mass measurements for a 25 sphere in Tu and WC tampers LA-443 Building D plutonium recovery processes LA-444 Measurement of the slow-neutron fission cross section of Pu[sup 240] LA-445 Fission cross sections by the Be[sup 7] and Mn-bath methods LA-446 Specific alpha activity of plutonium LA-447 Fission cross section of uranium 235 from 20 to 500 Kev LA-448 Cloud-chamber effect in large explosions LA-449-Del. Solution of some stationary neutron diffusion problems in spherical media with radially varying density LA-462 Microvolumetric assay of uranium LA-463 Oxidation of tracer amounts of plutonium by perchloric acid LA-465 On the theory of neutron multiplication LA-466 Electric and thermal behavior of completely ionized deuterium in presence of a magnetic field LA-467 Capture cross sections of several substances for neutrons of various energies LA-468 Energy of neutrons from MsTh-D, La-D, Y-Be, and Sb-Be photo-neutron sources LA-469 Radioassay of plutonium LA-470 Dependence of reactivity of the water boiler on the mass of 25 in the sphere LA-471 Relative effectiveness of delayed neutrons in the waterboiler LA-472 Preparation of uranium metal by the bomb method LA-473 Preparation of plutonium metal by the bomb method LA-481 Asymptotic method of solving neutron-diffusion problems LA-482 Integrating polonium meter LA-484 Theory of ion chambers LA-485 Ratio of the thermal fission cross sections of 23 and 25 LA-486 Methods for measuring fast decay of a near-critic- al assembly LA-487 A method for determining equations of state and reaction zones in detonation of high explosives, and its application to pentolite, composition-B, baratol, and TNT LA-488 Alpha counters as used inradioassay of plutonium LA-489 Hydrogen peroxide as a reagent in plutonium recovery LA-490 Futher investigation of spontaneous fission in plutonium LA-491 Average number of neutron emitted per spontaneous fission by Pu[sup 240] LA-493 Graphical method of obtaining critical masses of water-tamped water boilers LA-494 Developement of gamma-phase hot-pressing of uranium LA-495 Metallographic preparation and structure of plutonium and some plutonium alloys LA-501 Properties of pultonium alloys LA-502 Dilatometric studies on the allotropic transforma- tions of plutonium LA-505 Continuous purification of hydrogen and argon-hydrogen gas mixtures LA-506 Transmission of gama rays through spheres of scattering material LA-507 Microvolumetric assay of plutonium LA-509 Gamma radiation dosage at Hiroshima from recovered photosensitive material LA-510 Mass ratios and energy release in the fission of U[sup 235], U[sup 233] and Pu[sup 239] by thermal neutrons LA-511 Determination of the number of fission in two irradiated samples of U[sup 235] LA-512 Capture cross section of U-235 for pile neutrons LA-514 Snouting and focusing the cyclotron beam LA-515 Absolute (n, p) cross section of sulfur LA-519 Slugulation during explosion due to Taylor instability LA-520 Fission cross sections of 02, 23, 25, 28, 49, B[sup 10] and Li[sup 6] LA-522 Induced currents in a hemispherical shell LA-524 The calculation of critical masses including the effects of the distribution of neutron energies LA-525-Del. Ignition of deuterium-tritium mixtures : numerical calculations using the ENIAC LA-526 Method of measuring the drift velocity of electrons in gases LA-527 Time for fission LA-531 July 16th nuclear explosion : space-time relationships LA-536 Half-life determination of artificially induced activities LA-537 Recovery of enriched uranium from reduction residues LA-538 Electrical resistance method of measuring the velocity imparted to metals by high explosives LA-539 Absolute yield of delayed neutrons from plutonium fission, with fast-neutron excitation LA-541 Counter for use in scattering and disintegration experiments LA-542 Scattering by helium of neutrons from 0.6 to 1.6 Mev LA-543 Apparatus for rapid analysis of boron 10 LA-544 Fission products : 25 - minute samarium 155 LA-545 Underwater explosion of a nuclear bomb LA-546 Fast-neutron distribution : two infinite plane slowing-down media with point source inone medium LA-548 Sweeping of radioactive gases from a homogeneous pile, April 11, 1946 LA-549 Metabolism of plutonium in the rat LA-550 Cross-roads handbook of explosion phenomena LA-551-Del. Prima facie proof of the feasibility of the super LA-552 Preparation of a mock fission neutron source LA-554 Measurement of neutron fluxes in the region 30 to 500 Kev with proportional counters LA-555 Neutron experiments with beryllium spheres LA-556 Cloud-chamber and photoplate measurements of the fission-neutron spectrum of 49 LA-557 LA - 140 gamma-ray sources LA-558 Directional properties of fission neutrons LA-561 Isotopic constitution of plutonium : Part 3 LA-562 Fission cross section of uranium 235 for 25-kilovolt neutrons LA-564 Penetration of gamma rays through thick targets LA-570 Theoretical calculations for integral tamper experiments LA-571 Neutron diffusion : spherical harmonics theory LA-574 Gravity waves generated by surface and underwater explosions in shallow water LA-575-Del. Report of conference on the super LA-576 High-speed x-ray apparatus LA-577 Formation and rise of smoke clouds from explosions LA-581 Low-energy cross section of the D-D reaction and angular distribution of the protons emitted LA-582 Low-energy cross section of the D-T reaction and angular distribution of the alpha particles emitted LA-583 "Loading Pit" manual : second printing LA-586 Equation of state of high explosive and calulation of detonation waves LA-587 Spalling of metal plates LA-588 July 16th, 1945 nuclear explosion : preliminary report on the spectrum and radiation LA-589 Fabrication of refractory shapes LA-591-Del. Statistical behavior of neutron chains LA-593 Amplifier response LA-594 IBM approximation method for free-surface problems LA-596 Efficiency for very slow assembly LA-602 Ignition of the atmosphere with nuclear bombs LA-603 Neutron diffusion in a space lattice of fissionable and absorbing materials LA-604 Physical properties and crystal structure of polonium LA-606 Slow-neutron disintegration of boron-10 : search for the formation of Be(10) and estimate of the mean life of Be(10) LA-607 ([alpha],n) cross-sections of beryllium, magnesium and aluminum LA-608 A theorem and its application to finite tampers LA-609 Critical dimensions of water-tamped slabs and spheres of active material LA-611 Energy distribution of the fragments resulting from the fission of U[sup 235] by slow and by fast neutrons LA-612 Gamma-ray counter for the measurement of polonium source intensity LA-615 The Mark IV ballastic program LA-617 Time scale measurements by the Rossi method LA-618 Critical masses of enriched uranium hydrides and some related measurements LA-621 Shock-induced luminosity and its application to flash photography LA-622 A neutron detector having uniform sensitivity from 10 Kev to 3 Mev LA-626 Nuclear explosion 16 July 1945 : health physics report on radioactive contamination throughout New Mexico following the nuclear explosion LA-628 Properties of 86s I(136) LA-629 Half-life of tritium LA-630 Neutron absorption cross sections of radioactive La[sup 140], Ba[sup 140], and two stable C[sub 0] isotopes LA-631-Del. Preparation and operational plan of medical group (TR-7) for nuclear explosion 16 July 1945 LA-637 Neutron cross sections of U[sup 235] and Pu[sup 239] at low energies LA-639 Thermal analysis of plutonium LA-640 Plastic bonding of various materials LA-646 Cross sections for gamma ray processes LA-647 Methods of opacity calculations LA-650 Opacity of solar material LA-652 On the two inverse reactions H[sup 3](p,n)He[sup 3] and He[sup 3](n,p)H[sup 3] LA-654 Studies on the scattering of neutrons by protons LA-656 Thermodynamic functions for tritium and tritium hydride : the equilibrium of tritium and hydrogen with tritium hydride : the dissociation of tritium and tritium hydride LA-657 On the numerical solution of partial differential equations of parabolic type LA-658 Organization and function of the CMR-contaminated clothes laundry LA-659 Ranges in air and mass identification of plutonium fission fragments LA-660 The ([alpha],n) cross section of boron LA-661 Thermal conductivity of stabilized [alpha]-phase plutonium LA-663 Integral diffusion kernel for a cylinder LA-671 Proposed numerical method for calculation of shocks LA-672 Neutron density, point source and plane source LA-673 Upper limits of the fission cross sections of bismuth, lead, mercury, gold, iridium and tungsten for 14 Mev neutrons LA-683 Multiplicative systems in several variables, 1 LA-685 Production of MgO crucibles used at Los Alamos LA-686 Estimation of slow neutron dosage in whole body irradiation LA-687 Radiation doses in the Pajarito accident of May 21, 1946 LA-687(Tentative) Radiation doses in the Pajarito accident of May 21, 1946 LA-688 He[sup 3] isotopic abundance measurement by counter technique LA-689 Comparison of PoBe neutron source number P-2 "blue" to the standard RaBe source number 44 by integration of the indium resonance activity throughout the standard graphite pile LA-690 Multiplicative systems in several variables, 2 LA-691 On the application of neutron techniques to the experimental investigation of the low temperature properties of He[sup 3] or He[sup 4]-He[sup 3] systems LA-695 Assay of uranium tetrafluoride LA-696 Colorimetric determination of boron in beryllium metal and beryllium oxide LA-697 Fast neutron distribution in uranium LA-699 Proposed numerical method for calculation of shocks, 2 LA-701 Thermodynamic functions for tritium deuteride : dissociation of tritium deuteride : equilibria among the isotopic hydrogen molecules LA-702 Further studies on the scattering of neutrons by protons LA-703 Determination of nickel, iron and chromium in mercury LA-705 Study of the interaction of protons with tritium LA-706 Relative sensitivities of some organic compounds for scintillation counters LA-707 Multiplicative systems in several variables, III LA-707 Multiplication systems in several variables, 3 LA-710 Neutron fission cross secion of U[sup 238] in the region of neutron energy between 6 and 9 Mev LA-712 A classical treatment of electrostatic excitation of nuclear P[sub 2] vibrations LA-715 A study of the spectrum of neutrons of low energy from the fission of U[sup 235] LA-718 Energy spectrum of neutrons from fissions induced by thermal neutrons LA-719 The fission cross section of U[sup 238] for 14 Mev neutrons LA-720 Fabrication of U[sup 235] discs for the General Electric power pile LA-721 The total cross section of the He[sub 3] nucleus for slow neutrons LA-723 The Conservation of energy and momentum in nuclear reactions LA-725 Thresholds for the photo-disintegration of Zr[sup 90], Pr[sup 141], As[sup 75], I[sup 127], Ni[sup 58], and La[sup 138] LA-726 Relative photofission cross sections of several fissionable materials LA-729 On some possible magnetic properties of liquid He[sub 3] : preliminary communication LA-731 The determination of equation of state data from measurements in shocks LA-733 A note on the correction of Ra La transmission curves LA-734 Equation of state of aluminum at high temperatures LA-735 A Modified decade scaler : final report on project authorization number CMR-3-5 LA-736 Fabrication of hollow spheres of uranium : section 1, mold design and casting procedure; section 2, spherical magnesia cores LA-738 A combustion method for the determination of carbon in calcium metal LA-739 Effect of plutonium on colorimetric iron analysis LA-740 Inelastic collison cross sections of various elements for 14 Mev neutrons LA-741 Report on the petrographic examination of local soils LA-742 The preparation and reduction of divinylacetylene LA-743 Height of burst for atomic bombs LA-743R Height of burst for atomic bombs LA-744 Time scale measurments by the Rossi method LA-745 Optical and morphological crystallography of plutonium compounds LA-746 The Cu[sup 63](n,2n)Cu[sup 62] cross section as a function of neutron energy near the threshold LA-747 Angular distribution of 10.8 Mev deuterons scattered by deuterons LA-748 Cross section as a function of angle for the D(d,n)He[sup 3] reaction for 10 Mev bombarding deuterons LA-749 Polythene - 25 critical assembly and neutron distribution studies LA-750 Symmetrical tripartition of U[sup 235] by thermal neutrons LA-753 Portable fast-neutron fission-chamber monitor LA-755 Fission cross section of U[sup 238] in the neighborhood of 7 Mev LA-756 Serber-Wilson method formulae and computation methods LA-980 Differential cross section as a function of angle for the D(d,p)T reaction for 10.9 Mev bombarding deuterons LA-981 Differential cross section of the reaction He[sup 3](d,p)He[sup 4] at 10.2 Mev bombarding energy and search for excited state of He[sup 4] LA-990 Neutron diffusion theory : integral theory methods and formulae LA-994 Summary of fast fission cross sections