Volume 77, Issue 3

February 1950

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ARTICLES

Neutron Diffraction in Liquid Sulfur, Lead, and Bismuth

Owen Chamberlain

Phys. Rev. 77, 305 (1950) - Published 1 February, 1950

Neutron Deficient Radioactive Isotopes of Rhenium

Geoffrey Wilkinson and Harry G. Hicks

Phys. Rev. 77, 314 (1950) - Published 1 February, 1950

On the Theory of Slow Neutron Scattering by Liquid Helium

L. Goldstein, D. Sweeney, and M. Goldstein

Phys. Rev. 77, 319 (1950) - Published 1 February, 1950

Experimental Photo-Fission Thresholds in ${}_{92}U^{235}$ , ${}_{92}U^{238}$ , ${}_{92}U^{233}$ , ${}_{94}{Pu}^{239}$ , and ${}_{90}{Th}^{232}$

H. W. Koch, J. McElhinney, and E. L. Gasteiger

Phys. Rev. 77, 329 (1950) - Published 1 February, 1950

Multiple Production of Mesons

Phyllis Freier and E. P. Ney

Phys. Rev. 77, 337 (1950) - Published 1 February, 1950

A Cloud-Chamber Study of Cosmic-Ray Nuclear Interactions at 3260 Meters Elevation

W. W. Brown and A. S. McKay

Phys. Rev. 77, 342 (1950) - Published 1 February, 1950

Nuclear Dipole Vibrations and the Surface Symmetry Energy

R. D. Present

Phys. Rev. 77, 355 (1950) - Published 1 February, 1950

The Self-Stress of the Electron

F. Rohrlich

Phys. Rev. 77, 357 (1950) - Published 1 February, 1950

On the Effects of Internal Nuclear Motion on the Hyperfine Structure of Deuterium

Francis Low

Phys. Rev. 77, 361 (1950) - Published 1 February, 1950

Numerical Value of the Lamb Shift

H. A. Bethe, L. M. Brown, and J. R. Stehn

Phys. Rev. 77, 370 (1950) - Published 1 February, 1950

On the Solar Origin of Cosmic Radiation. II

H. Alfvén

Phys. Rev. 77, 375 (1950) - Published 1 February, 1950

On Some Low Ionizing Radiation Observed by Measurements of Cosmic Radiation at Great Depths

M. Miesowicz, L. Jurkiewicz, and J. M. Massalski

Phys. Rev. 77, 380 (1950) - Published 1 February, 1950

Surface Impedance of Superconducting Tin, Mercury, and Lead at 9200 Mc/Sec.

I. Šimon

Phys. Rev. 77, 384 (1950) - Published 1 February, 1950

Theory of Impurity Scattering in Semiconductors

E. Conwell and V. F. Weisskopf

Phys. Rev. 77, 388 (1950) - Published 1 February, 1950

Evaluation of the Stiffness Coefficients for Beryllium from Ultrasonic Measurements in Polycrystalline and Single Crystal Specimens

Louis Gold

Phys. Rev. 77, 390 (1950) - Published 1 February, 1950

A Note on the Quantization of Dissipative Systems

Wesley E. Brittin

Phys. Rev. 77, 396 (1950) - Published 1 February, 1950

Letters to the Editor

Mass Spectrographic Identification of Radioactive Lanthanum Isotopes

R. A. Naumann, F. L. Reynolds, and I. Perlman

Phys. Rev. 77, 398 (1950) - Published 1 February, 1950

Measurement of the Earth's Magnetic Field at High Altitudes at White Sands, New Mexico

S. F. Singer, E. Maple, and W. A. Bowen, Jr.

Phys. Rev. 77, 398 (1950) - Published 1 February, 1950

The Beta-Rays of $K^{40}$

P. R. Bell, Boyd Weaver, and J. M. Cassidy

Phys. Rev. 77, 399 (1950) - Published 1 February, 1950

Phase Relations in ${He}^{3}$ - ${He}^{4}$ Solutions

B. Weinstock, D. W. Osborne, and B. M. Abraham

Phys. Rev. 77, 400 (1950) - Published 1 February, 1950

Effects of Electrical Forming on the Rectifying Barriers of $n$ - and $p$ -Germanium Transistors

J. Bardeen and W. G. Pfann

Phys. Rev. 77, 401 (1950) - Published 1 February, 1950

Composite of Experimental Measurements of the Energy-Distribution among Beta-Particles from Tritium

E. P. Cooper and F. T. Rogers, Jr.

Phys. Rev. 77, 402 (1950) - Published 1 February, 1950

Natural Ferromagnetic Resonance

A. J. E. Welch, P. F. Nicks, Alan Fairweather, and F. F. Roberts

Phys. Rev. 77, 403 (1950) - Published 1 February, 1950

Beta-Spectrum and Decay Scheme of ${}_{65}{Tb}^{160}$

S. B. Burson, K. W. Blair, and D. Saxon

Phys. Rev. 77, 403 (1950) - Published 1 February, 1950

The Beta-Spectrum of ${He}^{6}$

V. Perez-Mendez and H. Brown

Phys. Rev. 77, 404 (1950) - Published 1 February, 1950

An Anomalous Dielectric Effect of Vacuum-Sputtered Ca $F_{2}$ Layers

Erkki A. Laurila

Phys. Rev. 77, 405 (1950) - Published 1 February, 1950

The Response of the Anthracene Scintillation Counter to Monoenergetic Electrons

John I. Hopkins

Phys. Rev. 77, 406 (1950) - Published 1 February, 1950

Energy Bands and Mobilities in Monatomic Semiconductors

W. Shockley and J. Bardeen

Phys. Rev. 77, 407 (1950) - Published 1 February, 1950

Color Centers in Calcium Fluoride and Barium Fluoride Crystals

Alexander Smakula

Phys. Rev. 77, 408 (1950) - Published 1 February, 1950

Gamma-Rays of $K^{40}$

P. R. Bell and J. M. Cassidy

Phys. Rev. 77, 409 (1950) - Published 1 February, 1950

Zenith Angle Dependence of Extensive Air Showers

H. L. Kraybill

Phys. Rev. 77, 410 (1950) - Published 1 February, 1950

The "1947 Values" of the Atomic Constants and the Revision of the Faraday Constant

Jesse W. M. DuMond

Phys. Rev. 77, 411 (1950) - Published 1 February, 1950

A Note on the ${Li}^{7} (p, n) {Be}^{7}$ Reaction and an Excited State of ${Be}^{7}$

T. A. Hall

Phys. Rev. 77, 411 (1950) - Published 1 February, 1950

Fast Protons from the Absorption of $π^{-}$ -Mesons by Nuclei

Stephen Tamor

Phys. Rev. 77, 412 (1950) - Published 1 February, 1950

Upper and Lower Bounds of Eigenvalues

Tosio Kato

Phys. Rev. 77, 413 (1950) - Published 1 February, 1950

Neutrons from ${Li}^{7} (p, n) {Be}^{7}$

V. R. Johnson, M. J. Wilson Laubenstein, and H. T. Richards

Phys. Rev. 77, 413 (1950) - Published 1 February, 1950

The Electromagnetic Concentration of ${Be}^{10}$

C. P. Keim, H. W. Savage, and Boyd Weaver

Phys. Rev. 77, 414 (1950) - Published 1 February, 1950

General Relation between Genuine and Chance Coincidences and Its Application to Measurement of High Activity Sources

Z. Bay and M. M. Slawsky

Phys. Rev. 77, 414 (1950) - Published 1 February, 1950

On the Motion of Particles in a Traveling Wave Linear Accelerator

John R. Terrall

Phys. Rev. 77, 415 (1950) - Published 1 February, 1950

Note on Nuclear Models

Hoff Lu

Phys. Rev. 77, 416 (1950) - Published 1 February, 1950

Measurement of Some Weak $γ$ -Ray Intensities

G. R. Bishop, Richard Wilson, and H. Halban

Phys. Rev. 77, 416 (1950) - Published 1 February, 1950

On the Classification of the Spectrum of Singly Ionized Uranium

J. Rand McNally, Jr.

Phys. Rev. 77, 417 (1950) - Published 1 February, 1950

On the Relativistic Electromagneto-Ionic Theory of Wave Propagation

V. A. Bailey

Phys. Rev. 77, 418 (1950) - Published 1 February, 1950

Calculation of Decay Times from Coincidence Experiments

Z. Bay

Phys. Rev. 77, 419 (1950) - Published 1 February, 1950

On the Energy Spectrum of Heavy Nuclei in Primary Cosmic Radiation

M. S. Vallarta

Phys. Rev. 77, 419 (1950) - Published 1 February, 1950

Longitudinal Photons in Quantum Electrodynamics

F. J. Dyson

Phys. Rev. 77, 420 (1950) - Published 1 February, 1950

The Microwave Spectrum of Bromine Monofluoride

D. F. Smith, M. Tidwell, and D. V. P. Williams

Phys. Rev. 77, 420 (1950) - Published 1 February, 1950

Intensity Distribution of the Second Positive ( $C {}^{3}Π \to B {}^{3}Π$ ) Band System of Molecular Nitrogen

R. W. Nicholls

Phys. Rev. 77, 421 (1950) - Published 1 February, 1950

New Types of Microwave Transitions Involving $l$ -Type Doubling in OCS and HCN

R. G. Shulman and C. H. Townes

Phys. Rev. 77, 421 (1950) - Published 1 February, 1950

Proceedings of the American Physical Society

Minutes of the Meeting of the New England Section at Williams College, Williamstown, Massachusetts, October 22, 1949

Phys. Rev. 77, 422 (1950) - Published 1 February, 1950