Volume 72, Issue 4

August 1947

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ARTICLES

Nuclear Quadrupole Moment Effects in the Inversion Spectrum of Ammonia

Richard J. Watts and Dudley Williams

Phys. Rev. 72, 263 (1947) - Published 15 August, 1947

On the Origin of the Soft Component of Cosmic Radiation

W. Heitler and S. Power

Phys. Rev. 72, 266 (1947) - Published 15 August, 1947

Decay Scheme of ${Sb}^{124}$

Walter E. Meyerhof and Gertrude Scharff-Goldhaber

Phys. Rev. 72, 273 (1947) - Published 15 August, 1947

A Solid-State Interpretation of the Structure Near the Limit of the Continuous X-Ray Spectrum

Jesse W. M. DuMond

Phys. Rev. 72, 276 (1947) - Published 15 August, 1947

The Infra-Red Spectrum and Molecular Constants of $C^{12}$ $O^{16}$ and $C^{13}$ $O^{16}$

Robert T. Lagemann, Alvin H. Nielsen, and Fred P. Dickey

Phys. Rev. 72, 284 (1947) - Published 15 August, 1947

Negative Corona in Freon-Air Mixtures

G. L. Weissler and E. I. Mohr

Phys. Rev. 72, 289 (1947) - Published 15 August, 1947

Positive Corona in Freon-Air Mixtures

E. I. Mohr and G. L. Weissler

Phys. Rev. 72, 294 (1947) - Published 15 August, 1947

Statistical Geometry and Fundamental Particles

Nathan Rosen

Phys. Rev. 72, 298 (1947) - Published 15 August, 1947

The Deflection of Charged Particles in a Ferromagnetic Medium

Gregory H. Wannier

Phys. Rev. 72, 304 (1947) - Published 15 August, 1947

Interpretation of the Triton Moment

R. G. Sachs

Phys. Rev. 72, 312 (1947) - Published 15 August, 1947

Ultrasonic Measurements on Single Crystals

H. B. Huntington

Phys. Rev. 72, 321 (1947) - Published 15 August, 1947

Specular Reflection from Mercury Vapor

Jay M. Hansen and Harold W. Webb

Phys. Rev. 72, 332 (1947) - Published 15 August, 1947

The Electromagnetic Shift of Energy Levels

H. A. Bethe

Phys. Rev. 72, 339 (1947) - Published 15 August, 1947

Spectral Location of the Absorption Due to Color Centers in Alkali Halide Crystals

Henry F. Ivey

Phys. Rev. 72, 341 (1947) - Published 15 August, 1947

Letters to the Editor

Nuclear and Molecular Constants from Microwave Spectra: Methyl Chloride and Methyl Bromide

Walter Gordy, James W. Simmons, and A. G. Smith

Phys. Rev. 72, 344 (1947) - Published 15 August, 1947

Density of Surface States on Silicon Deduced from Contact Potential Measurements

W. H. Brattain and W. Shockley

Phys. Rev. 72, 345 (1947) - Published 15 August, 1947

Evidence for Surface States on Semiconductors from Change in Contact Potential on Illumination

W. H. Brattain

Phys. Rev. 72, 345 (1947) - Published 15 August, 1947

Note on the Disintegration Energies of ${Na}^{24}$ and ${Al}^{28}$

Walter H. Barkas

Phys. Rev. 72, 346 (1947) - Published 15 August, 1947

Cavity Accelerator for Electrons

H. L. Schultz, R. Beringer, C. L. Clarke, J. A. Lockwood, R. L. McCarthy, C. G. Montgomery, P. J. Rice, and W. W. Watson

Phys. Rev. 72, 346 (1947) - Published 15 August, 1947

The Isotopic Composition of Meteoritic Copper

Harrison Brown and M. G. Inghram

Phys. Rev. 72, 347 (1947) - Published 15 August, 1947

An Experimental Method for the Estimation of the Age of the Elements

Harrison Brown

Phys. Rev. 72, 348 (1947) - Published 15 August, 1947

The Effect of a Direct Current Potential on the Initiation of a Radiofrequency Discharge

F. Kirchner

Phys. Rev. 72, 348 (1947) - Published 15 August, 1947

On the Existence of a Calcium Isotope with an 8.5 Day Period

Roy Overstreet and Louis Jacobson

Phys. Rev. 72, 349 (1947) - Published 15 August, 1947

A New Naturally Occurring Lanthanum Isotope at Mass 138

Mark G. Inghram, Richard J. Hayden, and David C. Jess, Jr.

Phys. Rev. 72, 349 (1947) - Published 15 August, 1947

Theoretical Evaluation of the Size-Frequency Curve of Extensive Cosmic-Ray Showers

G. Cocconi

Phys. Rev. 72, 350 (1947) - Published 15 August, 1947

Altitude Dependence of High Energy Atmospheric Showers

Henry L. Kraybill and Paul J. Ovrebo

Phys. Rev. 72, 351 (1947) - Published 15 August, 1947

Fission of Bismuth, Lead, Thallium, Platinum, and Tantalum with High Energy Particles

I. Perlman, R. H. Goeckermann, D. H. Templeton, and J. J. Howland

Phys. Rev. 72, 352 (1947) - Published 15 August, 1947

The Radiations from 60-Day ${Ir}^{192}$ and 27-Day ${Pa}^{233}$

Paul W. Levy

Phys. Rev. 72, 352 (1947) - Published 15 August, 1947

On a Connection between the Fountain Effect, Second Sound, and Thermal Conductivity in Liquid Helium II

Laszlo Tisza

Phys. Rev. 72, 353 (1947) - Published 15 August, 1947

Production of Helium in Meteorites by Cosmic Radiation

Carl August Bauer

Phys. Rev. 72, 354 (1947) - Published 15 August, 1947

Erratum: On the Alleged Gamma Ray of $N^{13}$ [Phys. Rev. 71, 906 (1947)]

L. M. Langer, C. S. Cook, and M. B. Sampson

Phys. Rev. 72, 355 (1947) - Published 15 August, 1947

On the High Energy Neutron-Proton Scattering

J. Leite Lopes

Phys. Rev. 72, 355 (1947) - Published 15 August, 1947

Quantitative Alpha-Particle Counting by the Emulsion Technique

Herman Yagoda and Nathan Kaplan

Phys. Rev. 72, 356 (1947) - Published 15 August, 1947