Volume 80, Issue 1

October 1950

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ARTICLES

The Molecular Spectrum of ${He}^{3}$

G. H. Dieke and Eugene Sant Robinson

Phys. Rev. 80, 1 (1950) - Published 1 October, 1950

A Study of the Slowing Down Distribution of ${Sb}^{124}$ -Be Photo-Neutrons in Graphite, and of the Use of Indium Foils

L. D. Roberts, J. E. Hill, and G. McCammon

Phys. Rev. 80, 6 (1950) - Published 1 October, 1950

Letters to the Editor

Neutron Penetration and Slowing Down at Intermediate Distances through Medium and Heavy Nuclei

H. A. Bethe, L. Tonks, and H. Hurwitz, Jr.

Phys. Rev. 80, 11 (1950) - Published 1 October, 1950

ARTICLES

Neutron Scattering Cross Sections of the Noble Gases

Sigmund P. Harris

Phys. Rev. 80, 20 (1950) - Published 1 October, 1950

Total Cross Sections of Nuclei for 280-Mev Neutrons

R. Fox, C. Leith, L. Wouters, and K. R. MacKenzie

Phys. Rev. 80, 23 (1950) - Published 1 October, 1950

Nuclear Cross Sections for 270-Mev Neutrons

James DeJuren

Phys. Rev. 80, 27 (1950) - Published 1 October, 1950

Measurement of Absolute Electron Capture Rates with an Application to the Decay of ${Ni}^{57}$

G. Friedlander, M. L. Perlman, D. Alburger, and A. W. Sunyar

Phys. Rev. 80, 30 (1950) - Published 1 October, 1950

Angular Correlation in the Reaction $F^{19} (p, α) O^{16 *} (γ) O^{16}$

Wayne R. Arnold

Phys. Rev. 80, 34 (1950) - Published 1 October, 1950

Cascade Showers in Lead

Kenneth M. Crowe and Evans Hayward

Phys. Rev. 80, 40 (1950) - Published 1 October, 1950

Note on the ${Li}^{7}$ Quadrupole Moment

R. D. Present

Phys. Rev. 80, 43 (1950) - Published 1 October, 1950

The Primary Specific Ionization and Intensity of the Cosmic Radiation above the Atmosphere at the Geomagnetic Equator

S. F. Singer

Phys. Rev. 80, 47 (1950) - Published 1 October, 1950

A Determination of the High Altitude Latitude Dependence in Cosmic-Ray Neutron Intensity

William P. Staker

Phys. Rev. 80, 52 (1950) - Published 1 October, 1950

A Floating Double Probe Method for Measurements in Gas Discharges

E. O. Johnson and L. Malter

Phys. Rev. 80, 58 (1950) - Published 1 October, 1950

Scattering of Electrons in Crystals in the Presence of Large Electric Fields

J. Bardeen and W. Shockley

Phys. Rev. 80, 69 (1950) - Published 1 October, 1950

Deformation Potentials and Mobilities in Non-Polar Crystals

J. Bardeen and W. Shockley

Phys. Rev. 80, 72 (1950) - Published 1 October, 1950

The Hamiltonian of the General Theory of Relativity with Electromagnetic Field

Peter G. Bergmann, Robert Penfield, Ralph Schiller, and Henry Zatzkis

Phys. Rev. 80, 81 (1950) - Published 1 October, 1950

Letters to the Editor

The Dielectric Constant of Liquid Helium

C. J. Grebenkemper and John P. Hagen

Phys. Rev. 80, 89 (1950) - Published 1 October, 1950

Relativistic Increase in Ionization of Charged Particles in Photographic Emulsions

E. Pickup and L. Voyvodic

Phys. Rev. 80, 89 (1950) - Published 1 October, 1950

Neutron Capture $γ$ -Rays from Cd, Cl, and C

Richard Wilson

Phys. Rev. 80, 90 (1950) - Published 1 October, 1950

A Standard Substance for Precise Electron Diffraction Measurements

F. W. C. Boswell

Phys. Rev. 80, 91 (1950) - Published 1 October, 1950

Pulses in Argon Counters

Laura Colli, Ugo Facchini, and Emilio Gatti

Phys. Rev. 80, 92 (1950) - Published 1 October, 1950

Domain Structure of Rochelle Salt

J. Furuichi and T. Mitsui

Phys. Rev. 80, 93 (1950) - Published 1 October, 1950

The $γ$ -Ray Spectrum Resulting from Capture of Negative $π$ -Mesons in Hydrogen

Wolfgang K. H. Panofsky, Lee Aamodt, James Hadley, and Robert Phillips

Phys. Rev. 80, 94 (1950) - Published 1 October, 1950

Atomic Positions and Vibrations in the Ferroelectric BaTi $O_{3}$ Lattice

W. Kaenzig

Phys. Rev. 80, 94 (1950) - Published 1 October, 1950

Role of Metastable ( ${}^{3}P_{2}$ ) Hg Atoms in Low Current Discharges in Hg Rare Gas Mixtures

Carl Kenty

Phys. Rev. 80, 95 (1950) - Published 1 October, 1950

A New Form of Discharge in Gas Mixtures: The Flashing Discharge

Carl Kenty

Phys. Rev. 80, 96 (1950) - Published 1 October, 1950

Grain Counts and Corrected $α$ -Particle Range-Energy Curve for Ilford E-1 Emulsions

Isadore B. Berlman

Phys. Rev. 80, 96 (1950) - Published 1 October, 1950

The Probable Energy Loss of Electrons in Matter

S. D. Warshaw and Joses J. L. Chen

Phys. Rev. 80, 97 (1950) - Published 1 October, 1950

Effect of Finite Range Interactions in the ( $jj$ ) Coupling Shell Model

Dieter Kurath

Phys. Rev. 80, 98 (1950) - Published 1 October, 1950

${Os}^{182}$ and ${Os}^{183}$ , New Radioactive Osmium Isotopes

Betsy Jones Stover

Phys. Rev. 80, 99 (1950) - Published 1 October, 1950

Sheath Formation in Ion-Neutralized Electron Beams

E. G. Linder

Phys. Rev. 80, 99 (1950) - Published 1 October, 1950

Some Remarks on the Analysis of the First U-Spark Spectrum

J. C. van den Bosch

Phys. Rev. 80, 100 (1950) - Published 1 October, 1950

Isotopic Separation due to Settling in the Atmosphere

John H. McQueen

Phys. Rev. 80, 100 (1950) - Published 1 October, 1950

Ionic Mobilities and the Electric Quadrupole Moment of $N_{2}$

M. H. Johnson

Phys. Rev. 80, 101 (1950) - Published 1 October, 1950

Microwave Investigation of SCSe

Børge Bak, Raymond Sloan, and Dudley Williams

Phys. Rev. 80, 101 (1950) - Published 1 October, 1950

Isotopic Constitution of Thulium

C. R. Lagergren and M. E. Kettner

Phys. Rev. 80, 102 (1950) - Published 1 October, 1950

On Nuclear Quadrupole Moments

R. Sternheimer

Phys. Rev. 80, 102 (1950) - Published 1 October, 1950

Nuclear Magnetic Resonance for $K^{39}$

T. L. Collins

Phys. Rev. 80, 103 (1950) - Published 1 October, 1950

Magnetic Moments of Odd Nuclei

A. de-Shalit

Phys. Rev. 80, 103 (1950) - Published 1 October, 1950

Natural Spread of the Conic Distribution of the Čerenkov Radiation

Yin-Yuan Li

Phys. Rev. 80, 104 (1950) - Published 1 October, 1950

Isomers and Shell Structure

Peter Axel

Phys. Rev. 80, 104 (1950) - Published 1 October, 1950

On the Determination of the $P - P$ Interaction from Scattering Experiments

Carl-Erik Fröberg

Phys. Rev. 80, 105 (1950) - Published 1 October, 1950

Theory of Natural Alpha-Radioactivity

Bernard L. Cohen

Phys. Rev. 80, 105 (1950) - Published 1 October, 1950

Ionization by Recoil Particles from Alpha-Decay

Rufus C. Ling and Julian K. Knipp

Phys. Rev. 80, 106 (1950) - Published 1 October, 1950

The Meson Spectrum and Meterological Variations in Cosmic-Ray Intensity

D. C. Rose

Phys. Rev. 80, 106 (1950) - Published 1 October, 1950

Gamma-Ray Resonances Produced by the Bombardment of Phosphorus with Protons

G. R. Grove, John N. Cooper, and J. C. Harris

Phys. Rev. 80, 107 (1950) - Published 1 October, 1950

New Evidence for the Existence of Positively Charged Particles Appearing near Beta-Ray Emitters

Gerhart Groetzinger and David Kahn

Phys. Rev. 80, 108 (1950) - Published 1 October, 1950

Neutron Production by Proton Bombardment below the ( $p, n$ ) Threshold

B. Jennings, K. H. Sun, and H. A. Leiter

Phys. Rev. 80, 109 (1950) - Published 1 October, 1950

Chemical Shifts in the Magnetic Resonance of $F^{19}$

H. S. Gutowsky and C. J. Hoffman

Phys. Rev. 80, 110 (1950) - Published 1 October, 1950

The $β$ -Spectrum of $C^{14}$

S. D. Warshaw

Phys. Rev. 80, 111 (1950) - Published 1 October, 1950

A Thermal Mechanism for Residual Latent Image Fading in Nuclear Emulsions

Arthur Beiser

Phys. Rev. 80, 112 (1950) - Published 1 October, 1950

Mechanism of Magnetization in Alnico V

E. A. Nesbitt and H. J. Williams

Phys. Rev. 80, 112 (1950) - Published 1 October, 1950

On the Isomerism of ${Xe}^{131}$

Ingmar Bergström

Phys. Rev. 80, 114 (1950) - Published 1 October, 1950

Microwave Magnetic Resonance Absorption in Nitrogen Dioxide

J. G. Castle, Jr. and Robert Beringer

Phys. Rev. 80, 114 (1950) - Published 1 October, 1950

Angular Correlation of the Gamma-Rays Emitted from the Excited States of $A^{38}$

Rolf M. Steffen

Phys. Rev. 80, 115 (1950) - Published 1 October, 1950

ERRATA

Erratum: On the Primary Cosmic-Ray Spectrum

J. A. Van Allen and S. F. Singer

Phys. Rev. 80, 116 (1950) - Published 1 October, 1950

Letters to the Editor

Apparent Error in the Measured Mass of $S^{32}$

A. S. Penfold

Phys. Rev. 80, 116 (1950) - Published 1 October, 1950

Detection of Beta-Induced Scintillations from Crystals with a Photo-Sensitive Geiger-Mueller Counter

C. E. Mandeville and H. O. Albrecht

Phys. Rev. 80, 117 (1950) - Published 1 October, 1950

The Scattering Lengths of the Deuteron

D. G. Hurst and N. Z. Alcock

Phys. Rev. 80, 117 (1950) - Published 1 October, 1950

Angular Correlation: A General Proof of the Method of D. R. Hamilton

Stuart P. Lloyd

Phys. Rev. 80, 118 (1950) - Published 1 October, 1950

Quantum Effects in the Interaction of Electrons with High Frequency Fields

J. C. Ward

Phys. Rev. 80, 119 (1950) - Published 1 October, 1950

Self-Diffusion in Cobalt

Foster C. Nix and Frank E. Jaumot, Jr.

Phys. Rev. 80, 119 (1950) - Published 1 October, 1950

A New Method of Integration of Weak Nuclear Magnetic Resonance Signals

G. Suryan

Phys. Rev. 80, 119 (1950) - Published 1 October, 1950

Proceedings of the American Physical Society

Minutes of the Meeting at Mexico City, June 21-23, 1950

Phys. Rev. 80, 120 (1950) - Published 1 October, 1950