Volume 78, Issue 2

April 1950

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ARTICLES

A Reinterpretation of the Electron Spectra of Radioactive Ytterbium and Tantalum

J. M. Cork, H. B. Keller, W. C. Rutledge, and A. E. Stoddard

Phys. Rev. 78, 95 (1950) - Published 15 April, 1950

Quantum Electrodynamics: The Self-Energy Problem

Hartland S. Snyder

Phys. Rev. 78, 98 (1950) - Published 15 April, 1950

Scarcity of States of ${Li}^{7}$ , from Magnetic Observation of ${Be}^{9} (d, α) {Li}^{7}$

D. R. Inglis

Phys. Rev. 78, 104 (1950) - Published 15 April, 1950

Analysis of Proton-Proton Scattering by Means of the $f$ Function

G. Breit and R. D. Hatcher

Phys. Rev. 78, 110 (1950) - Published 15 April, 1950

Dipole Transitions in the Nuclear Photo-Effect

J. S. Levinger and H. A. Bethe

Phys. Rev. 78, 115 (1950) - Published 15 April, 1950

The Fission Yield of ${Xe}^{133}$ and Fine Structure in the Mass Yield Curve

J. Macnamara, C. B. Collins, and H. G. Thode

Phys. Rev. 78, 129 (1950) - Published 15 April, 1950

On the Charge Independence of Nuclear Forces

Julian Schwinger

Phys. Rev. 78, 135 (1950) - Published 15 April, 1950

Microwave Spectroscopy in the Region from Two to Three Millimeters

O. R. Gilliam, Charles M. Johnson, and Walter Gordy

Phys. Rev. 78, 140 (1950) - Published 15 April, 1950

Molecular Dipole Moments and Stark Effects. III. Dipole Moment Determinations

R. G. Shulman, B. P. Dailey, and C. H. Townes

Phys. Rev. 78, 145 (1950) - Published 15 April, 1950

On the Role of the Subsidiary Condition in Quantum Electrodynamics

F. Coester and J. M. Jauch

Phys. Rev. 78, 149 (1950) - Published 15 April, 1950

On the Forces Producing the Ultrasonic Wind

Francis E. Fox and Karl F. Herzfeld

Phys. Rev. 78, 156 (1950) - Published 15 April, 1950

Average Thermionic Constants of Polycrystalline Tungsten Wires

M. H. Nichols

Phys. Rev. 78, 158 (1950) - Published 15 April, 1950

The Radiative Collisions of Positrons and Electrons

J. Katzenstein

Phys. Rev. 78, 161 (1950) - Published 15 April, 1950

Letters to the Editor

On Polarization of Radiation by Interstellar Medium

W. A. Hiltner

Phys. Rev. 78, 170 (1950) - Published 15 April, 1950

Measurements of the Influence on the Fountain Effect of ${He}^{3}$ Dissolved in ${He}^{4}$

K. W. Taconis, J. J. M. Beenakker, and Z. Dokoupil

Phys. Rev. 78, 171 (1950) - Published 15 April, 1950

On the Determination of the Relative Positron Activity of ${Cu}^{64}$ in a Source of ${Cu}^{61}$

C. Sharp Cook and Chia-hua Chang

Phys. Rev. 78, 171 (1950) - Published 15 April, 1950

The Latitude and Longitude Effects in Cosmic Rays Over the United States and Canada at 30,000 Feet

A. T. Biehl and H. V. Neher

Phys. Rev. 78, 172 (1950) - Published 15 April, 1950

Energy Band Structures in Semiconductors

W. Shockley

Phys. Rev. 78, 173 (1950) - Published 15 April, 1950

Microwave Measurements on the Stable Selenium Isotopes in OCSe

S. Geschwind, H. Minden, and C. H. Townes

Phys. Rev. 78, 174 (1950) - Published 15 April, 1950

Resonance and Thermal Neutron Scattering in $V^{51}$

M. Hamermesh and C. O. Muehlhause

Phys. Rev. 78, 175 (1950) - Published 15 April, 1950

Observations of the Rapid Withdrawal of Stored Holes from Germanium Transistors and Varistors

L. A. Meacham and S. E. Michaels

Phys. Rev. 78, 175 (1950) - Published 15 April, 1950

The Elastic Constants of Germanium Single Crystals

W. L. Bond, W. P. Mason, H. J. McSkimin, K. M. Olsen, and G. K. Teal

Phys. Rev. 78, 176 (1950) - Published 15 April, 1950

Energies of Some Gamma-Rays from ThC″, RaC, and ${Na}^{24}$

J. L. Wolfson

Phys. Rev. 78, 176 (1950) - Published 15 April, 1950

Infra-Red Absorption of Silicon

H. Y. Fan and M. Becker

Phys. Rev. 78, 178 (1950) - Published 15 April, 1950

Masses of ${Cr}^{50}$ , ${Cr}^{52}$ , and ${Fe}^{54}$

Henry E. Duckworth and Howard A. Johnson

Phys. Rev. 78, 179 (1950) - Published 15 April, 1950

On the Disintegration Scheme of $I^{131}$

I. Feister and L. F. Curtiss

Phys. Rev. 78, 179 (1950) - Published 15 April, 1950

The Scattering of Electrons by Hydrogen Atoms

H. S. W. Massey and B. L. Moiseiwitsch

Phys. Rev. 78, 180 (1950) - Published 15 April, 1950

On the Sudden Increase in Cosmic-Ray Intensity on November 19, 1949

D. C. Rose

Phys. Rev. 78, 181 (1950) - Published 15 April, 1950

An Identity in Quantum Electrodynamics

J. C. Ward

Phys. Rev. 78, 182 (1950) - Published 15 April, 1950

The Partial Molal Entropy of Superfluid in Pure ${He}^{4}$ below the $λ$ -Point

O. K. Rice

Phys. Rev. 78, 182 (1950) - Published 15 April, 1950

Thermodynamics of ${He}^{3}$ - ${He}^{4}$ Solutions

O. K. Rice and Olive G. Engel

Phys. Rev. 78, 183 (1950) - Published 15 April, 1950

ERRATA

Erratum: Internal Pair Formation

M. E. Rose

Phys. Rev. 78, 184 (1950) - Published 15 April, 1950

Letters to the Editor

The H.F.S. Anomaly of the Potassium Isotopes

S. A. Ochs, R. A. Logan, and P. Kusch

Phys. Rev. 78, 184 (1950) - Published 15 April, 1950

Non-Local Fields

M. Fierz

Phys. Rev. 78, 184 (1950) - Published 15 April, 1950

Thermal Expansion in Silver Halides

A. W. Lawson

Phys. Rev. 78, 185 (1950) - Published 15 April, 1950

Causes of Abnormal Efficiencies in Scintillation Counters

W. G. Cross

Phys. Rev. 78, 185 (1950) - Published 15 April, 1950

Proceedings of the American Physical Society

Minutes of the Meeting of the Ohio Section at Cincinnati, March 4, 1950

Phys. Rev. 78, 187 (1950) - Published 15 April, 1950