Volume 79, Issue 3

August 1950

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ARTICLES

Transition Curves of 330-Mev Bremsstrahlung

Wade Blocker, Robert W. Kenney, and Wolfgang K. H. Panofsky

Phys. Rev. 79, 419 (1950) - Published 1 August, 1950

The Disintegration of Ruthenium 103 and Palladium 103

J. Y. Mei, C. M. Huddleston, and Allan C. G. Mitchell

Phys. Rev. 79, 429 (1950) - Published 1 August, 1950

Letters to the Editor

Nuclear Energy Level Argument for a Spheroidal Nuclear Model

James Rainwater

Phys. Rev. 79, 432 (1950) - Published 1 August, 1950

ARTICLES

The 4n + 1 Radioactive Series: The Decay Products of $U^{233}$

French Hagemann, L. I. Katzin, M. H. Studier, G. T. Seaborg, and A. Ghiorso

Phys. Rev. 79, 435 (1950) - Published 1 August, 1950

Interaction of 12- to 13-Mev Neutrons with Deuterons

G. L. Griffith, M. E. Remley, and P. G. Kruger

Phys. Rev. 79, 443 (1950) - Published 1 August, 1950

A Redetermination of the Relative Abundances of the Isotopes of Neon, Krypton, Rubidium, Xenon, and Mercury

Alfred O. Nier

Phys. Rev. 79, 450 (1950) - Published 1 August, 1950

Study of Electron-Electron Scattering

Gerhart Groetzinger, Lewis B. Leder, Fred L. Ribe, and Martin J. Berger

Phys. Rev. 79, 454 (1950) - Published 1 August, 1950

Magnetic Cloud-Chamber Analysis of Cosmic Rays at 3.4 Kilometers

Charles E. Miller, Joseph E. Henderson, David S. Potter, Jay Todd, Jr., and A. William Wotring

Phys. Rev. 79, 459 (1950) - Published 1 August, 1950

Evidence for the Formation of ${Ce}^{139}$ by an $n - γ$ Reaction

Alfred J. Moses and Don S. Martin, Jr.

Phys. Rev. 79, 467 (1950) - Published 1 August, 1950

Variational Principles for Scattering Processes. I

B. A. Lippmann and Julian Schwinger

Phys. Rev. 79, 469 (1950) - Published 1 August, 1950

Variational Principles for Scattering Processes. II. Scattering of Slow Neutrons by Para-Hydrogen

B. A. Lippmann

Phys. Rev. 79, 481 (1950) - Published 1 August, 1950

Isomerism in ${Co}^{58}$

Karl Strauch

Phys. Rev. 79, 487 (1950) - Published 1 August, 1950

Decay Constants of $K^{40}$

G. A. Sawyer and M. L. Wiedenbeck

Phys. Rev. 79, 490 (1950) - Published 1 August, 1950

Reflection Properties of Spin ½ Fields and a Universal Fermi-Type Interaction

C. N. Yang and J. Tiomno

Phys. Rev. 79, 495 (1950) - Published 1 August, 1950

The Origin of Cosmic Rays

Edwin M. McMillan

Phys. Rev. 79, 498 (1950) - Published 1 August, 1950

The Extraordinary Increase of Cosmic-Ray Intensity on November 19, 1949

Scott E. Forbush, Thomas B. Stinchcomb, and Marcel Schein

Phys. Rev. 79, 501 (1950) - Published 1 August, 1950

Ratio of Cross Sections for Electron Capture and Electron Loss by Proton Beams in Metals

Theodore Hall

Phys. Rev. 79, 504 (1950) - Published 1 August, 1950

The Nuclear Quadrupole Moment of $N^{14}$ and the Structure of Nitrogen Trifluoride from Microwave Spectra

John Sheridan and Walter Gordy

Phys. Rev. 79, 513 (1950) - Published 1 August, 1950

An Application of the W.K.B. Method to the Cohesive Energy of Monovalent Metals

T. S. Kuhn

Phys. Rev. 79, 515 (1950) - Published 1 August, 1950

Quantum Field Theory

Hartland S. Snyder

Phys. Rev. 79, 520 (1950) - Published 1 August, 1950

Notes on the Theory of Dielectric Breakdown in Ionic Crystals

H. Fröhlich and F. Seitz

Phys. Rev. 79, 526 (1950) - Published 1 August, 1950

Letters to the Editor

Fission of Medium Weight Elements

Roger E. Batzel and Glenn T. Seaborg

Phys. Rev. 79, 528 (1950) - Published 1 August, 1950

On the Nature of $V$ -Centers in the Alkali Halides

Frederick Seitz

Phys. Rev. 79, 529 (1950) - Published 1 August, 1950

A Note on the Vapor Pressure of ${He}^{3}$ , ${He}^{4}$ Solutions

John E. Kilpatrick

Phys. Rev. 79, 529 (1950) - Published 1 August, 1950

The Isotopes of Americium

K. Street, Jr., A. Ghiorso, and G. T. Seaborg

Phys. Rev. 79, 530 (1950) - Published 1 August, 1950

The Low Terms of Ti II

Abraham Many

Phys. Rev. 79, 531 (1950) - Published 1 August, 1950

Remarks on the Variational Method for Scattering Problems

L. Hulthén and P. O. Olsson

Phys. Rev. 79, 532 (1950) - Published 1 August, 1950

Photo-Fission of Bismuth

Nathan Sugarman

Phys. Rev. 79, 532 (1950) - Published 1 August, 1950

Polaron States in Ionic Crystals

Herbert B. Callen

Phys. Rev. 79, 533 (1950) - Published 1 August, 1950

Paramagnetic Resonance and Hyperfine Structure in the Iron Transition Group

A. Abragam

Phys. Rev. 79, 534 (1950) - Published 1 August, 1950

Properties of ${Tl}^{209}$

French Hagemann

Phys. Rev. 79, 534 (1950) - Published 1 August, 1950

Resistivity of Semiconductors Containing Both Acceptors and Donors

C. S. Hung and V. A. Johnson

Phys. Rev. 79, 535 (1950) - Published 1 August, 1950

Note on the Revision of the Hyperfine Structure of the Spectrum of Mercury

K. Murakawa

Phys. Rev. 79, 536 (1950) - Published 1 August, 1950

On the Isomerism of ${Kr}^{85}$

Ingmar Bergström and Sigvard Thulin

Phys. Rev. 79, 537 (1950) - Published 1 August, 1950

On the Decay of ${Xe}^{133 m}$

Ingmar Bergström and Sigvard Thulin

Phys. Rev. 79, 538 (1950) - Published 1 August, 1950

Scattering of 3.27-Mev Neutrons by Deuterons in the Wilson Chamber

I. Hamouda, J. Halter, and P. Scherrer

Phys. Rev. 79, 539 (1950) - Published 1 August, 1950

Note on Angular Asymmetries in ( $γ, n$ ) Reactions

H. L. Poss

Phys. Rev. 79, 539 (1950) - Published 1 August, 1950

A Large Fluctuation in the Rate of Production of Nuclear Disintegrations Following a Solar Flare

J. J. Lord, A. W. Elston, and Marcel Schein

Phys. Rev. 79, 540 (1950) - Published 1 August, 1950

The Beta-Spectra of ${Zn}^{62}$ and ${Cu}^{62}$

Raymond W. Hayward

Phys. Rev. 79, 541 (1950) - Published 1 August, 1950

The ${Sn}^{117}$ Isomeric Activity

Raymond W. Hayward

Phys. Rev. 79, 542 (1950) - Published 1 August, 1950

Magnetic Resonance in Antiferromagnetic Materials near the Curie Temperature

E. P. Trounson, D. F. Bleil, R. K. Wangsness, and L. R. Maxwell

Phys. Rev. 79, 542 (1950) - Published 1 August, 1950

Single Synthetic Zinc Sulfide Crystals

D. C. Reynolds and S. J. Czyzak

Phys. Rev. 79, 543 (1950) - Published 1 August, 1950

The Thermal Neutron Scattering by Ammonium Chloride

Motoharu Kimura

Phys. Rev. 79, 544 (1950) - Published 1 August, 1950

The Shape of the Rossi Curve

W. Bothe and H. Thurn

Phys. Rev. 79, 544 (1950) - Published 1 August, 1950

Proceedings of the American Physical Society

Sixth Meeting of the Division of Fluid Dynamics at Urbana, Illinois, May 12, 13, 1950

Phys. Rev. 79, 546 (1950) - Published 1 August, 1950