Volume 79, Issue 4

August 1950

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ARTICLES

Fine Structure of the Hydrogen Atom. Part I

Willis E. Lamb, Jr. and Robert C. Retherford

Phys. Rev. 79, 549 (1950) - Published 15 August, 1950

Bremsstrahlung in High Energy Nucleon-Nucleon Collisions

Albert Simon

Phys. Rev. 79, 573 (1950) - Published 15 August, 1950

Results of 12.4-Mev Proton-Proton Scattering at 90°

F. E. Faris and Byron T. Wright

Phys. Rev. 79, 577 (1950) - Published 15 August, 1950

New Radioactive Isotopes of Iridium

T. C. Chu

Phys. Rev. 79, 582 (1950) - Published 15 August, 1950

Non-Equilibrium Phenomena in a Bose-Einstein Gas. Part II. Heat Transfer

William Band

Phys. Rev. 79, 589 (1950) - Published 15 August, 1950

Investigation of Nuclear Energy Levels in Sulfur

R. E. Peterson, H. H. Barschall, and C. K. Bockelman

Phys. Rev. 79, 593 (1950) - Published 15 August, 1950

The Neutrons from the Disintegration of the Separated Isotopes of Magnesium by Deuterons

C. P. Swann, C. E. Mandeville, and W. D. Whitehead

Phys. Rev. 79, 598 (1950) - Published 15 August, 1950

Diffusion Coefficient of C in $α$ -Iron

C. A. Wert

Phys. Rev. 79, 601 (1950) - Published 15 August, 1950

Radioactivity of ${Scandium}^{44}$

Joseph A. Bruner and Lawrence M. Langer

Phys. Rev. 79, 606 (1950) - Published 15 August, 1950

Radiations from ${Os}^{185}$ , ${Os}^{191}$ , and ${Os}^{193}$

Merle E. Bunker, Robert Canada, and Allan C. G. Mitchell

Phys. Rev. 79, 610 (1950) - Published 15 August, 1950

High Energy Elastic Scattering of Electrons on Protons

M. N. Rosenbluth

Phys. Rev. 79, 615 (1950) - Published 15 August, 1950

Anomalous Molecular Rotation and the Temperature of the Upper Atmosphere

Lewis M. Branscomb

Phys. Rev. 79, 619 (1950) - Published 15 August, 1950

The Liquid-Solid Transformation in Helium near Absolute Zero

C. A. Swenson

Phys. Rev. 79, 626 (1950) - Published 15 August, 1950

Fission Excitation Functions for Charged Particles

J. Jungerman

Phys. Rev. 79, 632 (1950) - Published 15 August, 1950

The Production of Mesons by Photons

K. A. Brueckner

Phys. Rev. 79, 641 (1950) - Published 15 August, 1950

The Fine Structure of the Microwave Absorption Spectrum of Oxygen

James H. Burkhalter, Roy S. Anderson, William V. Smith, and Walter Gordy

Phys. Rev. 79, 651 (1950) - Published 15 August, 1950

A Directional and Latitude Survey of Cosmic Rays at High Altitudes

J. R. Winckler, T. Stix, K. Dwight, and R. Sabin

Phys. Rev. 79, 656 (1950) - Published 15 August, 1950

Narrow Air Showers of Cosmic Rays II. Absorption Measurements

J. P. N. Wei

Phys. Rev. 79, 670 (1950) - Published 15 August, 1950

A Precision Evaluation of $\frac{h}{e}$ by X-Rays

J. A. Bearden and Guenter Schwarz

Phys. Rev. 79, 674 (1950) - Published 15 August, 1950

Nuclear Electric Quadrupole Interactions in Crystals

R. V. Pound

Phys. Rev. 79, 685 (1950) - Published 15 August, 1950

Quantization of Higher Order Equations

W. Thirring

Phys. Rev. 79, 703 (1950) - Published 15 August, 1950

Generalizations of the Weiss Molecular Field Theory of Antiferromagnetism

P. W. Anderson

Phys. Rev. 79, 705 (1950) - Published 15 August, 1950

$μ$ -Pair Theories and the $π$ -Meson

Gregor Wentzel

Phys. Rev. 79, 710 (1950) - Published 15 August, 1950

Letters to the Editor

A Method of Approximation for Cooperative Phenomena

Ryoichi Kikuchi

Phys. Rev. 79, 718 (1950) - Published 15 August, 1950

Cosmic Rays Underground

C. M. Garelli and G. Wataghin

Phys. Rev. 79, 718 (1950) - Published 15 August, 1950

Energy Levels in $C^{12}$ from ${Be}^{9} (α, n) C^{12}$

William H. Guier and James H. Roberts

Phys. Rev. 79, 719 (1950) - Published 15 August, 1950

Scintillations in Liquids and Solutions

M. Ageno, M. Chiozzotto, and R. Querzoli

Phys. Rev. 79, 720 (1950) - Published 15 August, 1950

On the Relative Production of $π^{+}$ - and $π^{-}$ - Mesons by Neutrons

Hugh Bradner, D. J. O'Connel, and B. Rankin

Phys. Rev. 79, 720 (1950) - Published 15 August, 1950

The Excited Nuclear State of ${Be}^{7}$

George D. Freier, T. F. Stratton, and L. Rosen

Phys. Rev. 79, 721 (1950) - Published 15 August, 1950

Multiplication Processes for Slow Moving Dislocations

F. C. Frank and W. T. Read, Jr.

Phys. Rev. 79, 722 (1950) - Published 15 August, 1950

Prismatic Dislocations and Prismatic Punching in Crystals

Frederick Seitz

Phys. Rev. 79, 723 (1950) - Published 15 August, 1950

Special and Magic Numbers as Factors in Nuclear Stability and Abundance

William D. Harkins

Phys. Rev. 79, 724 (1950) - Published 15 August, 1950

Yields of Photo-Neutrons with Calorimetrically Measured 320-Mev Bremsstrahlung

D. W. Kerst and G. A. Price

Phys. Rev. 79, 725 (1950) - Published 15 August, 1950

The Resistivity and Hall Effect of Germanium at Low Temperatures

C. S. Hung and J. R. Gliessman

Phys. Rev. 79, 726 (1950) - Published 15 August, 1950

Theory of Resistivity and Hall Effect at Very Low Temperatures

C. S. Hung

Phys. Rev. 79, 727 (1950) - Published 15 August, 1950

Infra-Red Spectra of Condensed Oxygen and Nitrogen

A. Lee Smith, William E. Keller, and Herrick L. Johnston

Phys. Rev. 79, 728 (1950) - Published 15 August, 1950

Beta-Gamma-Angular Correlation Experiments

J. R. Beyster and M. L. Wiedenbeck

Phys. Rev. 79, 728 (1950) - Published 15 August, 1950

Neutron-Deuteron Scattering at 4.5 and 5.5 Mev

Ernest Wantuch

Phys. Rev. 79, 729 (1950) - Published 15 August, 1950

Intensity and Lateral Distribution of the $N$ -Component in the Extensive Showers of the Cosmic Radiation

G. Cocconi and V. Cocconi Tongiorgi

Phys. Rev. 79, 730 (1950) - Published 15 August, 1950

Spectral Emission from Scintillation Solutions and Crystals

F. B. Harrison and G. T. Reynolds

Phys. Rev. 79, 732 (1950) - Published 15 August, 1950

Temperature Characteristics of Naphthalene-Anthracene Mixtures

S. H. Liebson and R. T. Farrar

Phys. Rev. 79, 733 (1950) - Published 15 August, 1950

Ambipolar Diffusion in Neon

Manfred A. Biondi

Phys. Rev. 79, 733 (1950) - Published 15 August, 1950

A New Method for Measuring Film Transport in Liquid He II

H. A. Boorse and J. G. Dash

Phys. Rev. 79, 734 (1950) - Published 15 August, 1950

A Precision Determination of the Half-Life of Radium C′

Guy von Dardel

Phys. Rev. 79, 734 (1950) - Published 15 August, 1950

Decay Time and Efficiency of a Liquid Scintillator

R. F. Post

Phys. Rev. 79, 735 (1950) - Published 15 August, 1950

The Velocity of Second Sound in Mixtures of ${He}^{3}$ and ${He}^{4}$

Ernest A. Lynton and Henry A. Fairbank

Phys. Rev. 79, 735 (1950) - Published 15 August, 1950

The Ionization of Hydrogen in Metals

Irvin Isenberg

Phys. Rev. 79, 736 (1950) - Published 15 August, 1950

The Virial Theorem and the Variation Principle

Irvin Isenberg

Phys. Rev. 79, 737 (1950) - Published 15 August, 1950

Superconductivity of Vanadium

Aaron Wexler and W. S. Corak

Phys. Rev. 79, 737 (1950) - Published 15 August, 1950

Cosmic Rays as the Source of General Galactic Radio Emission

K. O. Kiepenheuer

Phys. Rev. 79, 738 (1950) - Published 15 August, 1950

Ferromagnetic Block

L. W. McKeehan

Phys. Rev. 79, 739 (1950) - Published 15 August, 1950

Debye Modes and Superconductivity

William Band

Phys. Rev. 79, 739 (1950) - Published 15 August, 1950

On the Lower Levels of ${He}^{5}$

Herbert Goldstein

Phys. Rev. 79, 740 (1950) - Published 15 August, 1950

A Note on Asymmetric Fission

T. Yasaki and O. Miyatake

Phys. Rev. 79, 740 (1950) - Published 15 August, 1950

On the Particles Initiating High Energy Penetrating Showers

M. B. Gottlieb, A. J. Hartzler, and Marcel Schein

Phys. Rev. 79, 741 (1950) - Published 15 August, 1950

The Measurement of Proton Energies with Scintillation Counters

W. Franzen, R. W. Peelle, and R. Sherr

Phys. Rev. 79, 742 (1950) - Published 15 August, 1950

The Problem of Red Giants and Cepheid Variables

G. Gamow and C. Longmire

Phys. Rev. 79, 743 (1950) - Published 15 August, 1950

Pressure Broadening of Spectral Lines

T. Holstein

Phys. Rev. 79, 744 (1950) - Published 15 August, 1950

On the Evaluation of the Fermi $β$ -Distribution Function

Harvey Hall

Phys. Rev. 79, 745 (1950) - Published 15 August, 1950

Physical Theory of Ferromagnetic Domains

L. W. McKeehan

Phys. Rev. 79, 745 (1950) - Published 15 August, 1950

Nuclear Size Resonances

K. W. Ford and D. Bohm

Phys. Rev. 79, 745 (1950) - Published 15 August, 1950