Volume 75, Issue 7

April 1949

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ARTICLES

The Disintegration of ${Se}^{75}$

Michel Ter-Pogossian, J. Eugene Robinson, and C. Sharp Cook

Phys. Rev. 75, 995 (1949) - Published 1 April, 1949

Some Excitation Functions of Bismuth

E. L. Kelly and E. Segrè

Phys. Rev. 75, 999 (1949) - Published 1 April, 1949

Experimental Determinations of Stopping Powers Using Alpha-Particles of 15 to 37 Mev

E. L. Kelly

Phys. Rev. 75, 1006 (1949) - Published 1 April, 1949

Neutron Diffraction Studies of Order-Disorder in Alloys

C. G. Shull and Sidney Siegel

Phys. Rev. 75, 1008 (1949) - Published 1 April, 1949

A New Measurement of the Packing Fractions of the Nickel Isotopes

A. E. Shaw

Phys. Rev. 75, 1011 (1949) - Published 1 April, 1949

Microwave Investigations of Methyl Fluoride, Fluoroform, and Phosphorus Trifluoride

O. R. Gilliam, H. D. Edwards, and Walter Gordy

Phys. Rev. 75, 1014 (1949) - Published 1 April, 1949

The Characteristic Radiations of Praseodymium (142)

C. E. Mandeville

Phys. Rev. 75, 1017 (1949) - Published 1 April, 1949

Radioactive Isotopes of Platinum and Gold

Geoffrey Wilkinson

Phys. Rev. 75, 1019 (1949) - Published 1 April, 1949

Boundary Conditions and Range of Force for $S$ State of Two Protons

G. Breit and W. G. Bouricius

Phys. Rev. 75, 1029 (1949) - Published 1 April, 1949

Separation of a Gas Mixture Flowing through a Long Tube at Low Pressure

R. D. Present and A. J. Debethune

Phys. Rev. 75, 1050 (1949) - Published 1 April, 1949

The Density Spectrum of Extensive Air Showers of Cosmic Rays

G. Cocconi and V. Cocconi Tongiorgi

Phys. Rev. 75, 1058 (1949) - Published 1 April, 1949

Penetrating Particles in Extensive Cosmic-Ray Air Showers

G. Cocconi, V. Cocconi Tongiorgi, and K. Greisen

Phys. Rev. 75, 1063 (1949) - Published 1 April, 1949

Range of Cascade Showers in Lead

K. Greisen

Phys. Rev. 75, 1071 (1949) - Published 1 April, 1949

Some Properties of the Cosmic-Ray Ionizing Particles That Generate Penetrating Showers

G. Cocconi

Phys. Rev. 75, 1074 (1949) - Published 1 April, 1949

On the Quantization of a Unitary Field Theory

R. J. Finkelstein

Phys. Rev. 75, 1079 (1949) - Published 1 April, 1949

On the Canonical Reduction of Quadratic Forms

R. G. Helsel

Phys. Rev. 75, 1088 (1949) - Published 1 April, 1949

Remarks on the Evolution of the Expanding Universe

Ralph A. Alpher and Robert C. Herman

Phys. Rev. 75, 1089 (1949) - Published 1 April, 1949

Relation Between Half-Life and Energy in Alpha-Decay

I. Perlman, A. Ghiorso, and G. T. Seaborg

Phys. Rev. 75, 1096 (1949) - Published 1 April, 1949

Letters to the Editor

The Effect of Small Angle Scattering on Neutron Cross-Section Measurements

H. H. A. Krueger, D. Meneghetti, G. R. Ringo, and L. Winsberg

Phys. Rev. 75, 1098 (1949) - Published 1 April, 1949

Angular Distribution of Protons from Photo-Disintegration of the Deuteron

N. O. Lassen

Phys. Rev. 75, 1099 (1949) - Published 1 April, 1949

Gamma-Rays from ${Na}^{24}$ and $V^{48}$

J. Eugene Robinson, Michel Ter-Pogossian, and C. Sharp Cook

Phys. Rev. 75, 1099 (1949) - Published 1 April, 1949

Radioactive Thallium Isotopes Produced from Gold

D. A. Orth, L. Marquez, W. J. Heiman, and D. H. Templeton

Phys. Rev. 75, 1100 (1949) - Published 1 April, 1949

On the Hole Current in the Germanium Transistor

Kurt Lehovec

Phys. Rev. 75, 1100 (1949) - Published 1 April, 1949

On the Difficulty of the Meson Theory of Nuclear Forces

Gentaro Araki

Phys. Rev. 75, 1101 (1949) - Published 1 April, 1949

Microwave Spectrum of Methyl Bromide

A. Harry Sharbaugh and John Mattern

Phys. Rev. 75, 1102 (1949) - Published 1 April, 1949

ERRATA

Erratum: Screening and Relativistic Effects on Beta-Spectra

C. Longmire and H. Brown

Phys. Rev. 75, 1102 (1949) - Published 1 April, 1949

Letters to the Editor

Electronic Eigenfunctions in Ionic Crystals

Reikichi Nosawa

Phys. Rev. 75, 1102 (1949) - Published 1 April, 1949

Approximate Densities of Liquid ${He}^{3}$ between 1.27° and 2.79°K

E. R. Grilly, E. F. Hammel, and S. G. Sydoriak

Phys. Rev. 75, 1103 (1949) - Published 1 April, 1949

Space-Charge Wave Amplification Effects

V. A. Bailey

Phys. Rev. 75, 1104 (1949) - Published 1 April, 1949

Alpha-Radioactivity in Elements Lighter than Bismuth

N. E. Ballou

Phys. Rev. 75, 1105 (1949) - Published 1 April, 1949

The Determination of the Mass of $N_{7}^{16}$ by Means of Interpolation

Tibor Z. Szelenyi

Phys. Rev. 75, 1105 (1949) - Published 1 April, 1949

Energy of Beta-Rays from $K^{40}$

J. J. Floyd and L. B. Borst

Phys. Rev. 75, 1106 (1949) - Published 1 April, 1949

Exchange Moments of $H^{3}$ and ${He}^{3}$

R. Avery and E. N. Adams, II

Phys. Rev. 75, 1106 (1949) - Published 1 April, 1949

Radioactivity of $K^{40}$

Robert W. Stout

Phys. Rev. 75, 1107 (1949) - Published 1 April, 1949

The Beta-Ray Spectra of ${Cu}^{64}$ and the Ratio of N + /N -

C. S. Wu and R. D. Albert

Phys. Rev. 75, 1107 (1949) - Published 1 April, 1949

The Fundamental Band of Carbon Monoxide at $4.7 μ$ in the Solar Spectrum

Marcel V. Migeotte

Phys. Rev. 75, 1108 (1949) - Published 1 April, 1949

Shape of the Beta-Spectrum of the Forbidden Transition of Yttrium 91

Lawrence M. Langer and H. Clay Price, JR.

Phys. Rev. 75, 1109 (1949) - Published 1 April, 1949

Threshold Energy for Meson Production

Walter H. Barkas

Phys. Rev. 75, 1109 (1949) - Published 1 April, 1949

ERRATA

Erratum: On the Numerical Calculation of the Internal Conversion in the $K$ -Shell—The Electric Dipole Case

B. A. Griffith and J. P. Stanley

Phys. Rev. 75, 1110 (1949) - Published 1 April, 1949

Letters to the Editor

Alpha-Particle Ionization in Argon and in Air and the Range-Energy Curves

William P. Jesse and John Sadauskis

Phys. Rev. 75, 1110 (1949) - Published 1 April, 1949

Radiative Corrections to the Klein-Nishina-Formula

R. Schafroth

Phys. Rev. 75, 1111 (1949) - Published 1 April, 1949

Local Production of the Penetrating Particles in Extensive Showers

G. Salvini and G. Tagliaferri

Phys. Rev. 75, 1112 (1949) - Published 1 April, 1949

Nuclear Moments of Silver

M. F. Crawford, A. L. Schawlow, W. M. Gray, and F. M. Kelly

Phys. Rev. 75, 1112 (1949) - Published 1 April, 1949

Proceedings of the American Physical Society

Minutes of the Meeting of the Ohio Section at Columbus, February 19, 1949

Phys. Rev. 75, 1113 (1949) - Published 1 April, 1949