Volume 80, Issue 5

December 1950

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ARTICLES

Proton Groups from the $N^{14} (d, p) N^{15}$ and $N^{15} (d, p) 16$ Reactions

Robert Malm and W. W. Buechner

Phys. Rev. 80, 771 (1950) - Published 1 December, 1950

On the Bombardment of ${Li}_{2}$ O and C by Alpha-Particles and Deuterons

Isadore B. Berlman

Phys. Rev. 80, 775 (1950) - Published 1 December, 1950

The New Element Berkelium (Atomic Number 97)

S. G. Thompson, A. Ghiorso, and G. T. Seaborg

Phys. Rev. 80, 781 (1950) - Published 1 December, 1950

The New Element Californium (Atomic Number 98)

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

Phys. Rev. 80, 790 (1950) - Published 1 December, 1950

Singular Potentials

K. M. Case

Phys. Rev. 80, 797 (1950) - Published 1 December, 1950

Neutron Yields from Photo-Disintegration by Gamma-Rays from Lithium

B. D. McDaniel, R. L. Walker, and M. B. Stearns

Phys. Rev. 80, 807 (1950) - Published 1 December, 1950

On the Origin of the Lighter Elements

William Band

Phys. Rev. 80, 813 (1950) - Published 1 December, 1950

Interaction of Fast Neutrons with Nitrogen

C. H. Johnson and H. H. Barschall

Phys. Rev. 80, 818 (1950) - Published 1 December, 1950

The Scattering of Gamma-Rays by Nucleons

R. G. Sachs and L. L. Foldy

Phys. Rev. 80, 824 (1950) - Published 1 December, 1950

Penetrating Showers in Carbon

John R. Green

Phys. Rev. 80, 832 (1950) - Published 1 December, 1950

Total Cross Sections of Nuclei for 42-Mev Neutrons

Roger H. Hildebrand and Cecil E. Leith

Phys. Rev. 80, 842 (1950) - Published 1 December, 1950

Changes in Conductivity of Germanium Induced by Alpha-Particle Bombardment

W. H. Brattain and G. L. Pearson

Phys. Rev. 80, 846 (1950) - Published 1 December, 1950

The High Energy Neutrons from the Disintegration of $C^{13}$ by Deuterons

J. E. Richardson

Phys. Rev. 80, 850 (1950) - Published 1 December, 1950

The Total Scattering Cross Section of Neutrons by Hydrogen and Carbon

E. E. Lampi, G. D. Freier, and J. H. Williams

Phys. Rev. 80, 853 (1950) - Published 1 December, 1950

Pressure Measurement in Superflow

R. Bowers, B. S. Chandrasekhar, and K. Mendelssohn

Phys. Rev. 80, 856 (1950) - Published 1 December, 1950

Anomalous Heat Flow in Superconductors

K. Mendelssohn and J. L. Olsen

Phys. Rev. 80, 859 (1950) - Published 1 December, 1950

The Disintegration of Praseodymium 142

Erling N. Jensen, L. Jackson Laslett, and D. J. Zaffarano

Phys. Rev. 80, 862 (1950) - Published 1 December, 1950

Internal Conversion in the $L_{I}$ -Shell

H. Gellman, B. A. Griffith, and J. P. Stanley

Phys. Rev. 80, 866 (1950) - Published 1 December, 1950

Experimental Verification of Space Charge and Transit Time Reduction of Noise in Electron Beams

C. C. Cutler and C. F. Quate

Phys. Rev. 80, 875 (1950) - Published 1 December, 1950

Equilibrium Currents Induced in Zincblende by Electron Bombardment of Negative Electrode

Merril F. Distad

Phys. Rev. 80, 879 (1950) - Published 1 December, 1950

Periodic Deviations in the Schottky Effect for Tantalum

R. J. Munick, W. B. LaBerge, and E. A. Coomes

Phys. Rev. 80, 887 (1950) - Published 1 December, 1950

Magnetoresistance of Bismuth at 3000 Megacycles

C. W. Heaps

Phys. Rev. 80, 892 (1950) - Published 1 December, 1950

Magnetic Moments and Eddy Currents in Spheres of Superconducting Tin

James J. Fritz, Oscar D. Gonzalez, and Herrick L. Johnston

Phys. Rev. 80, 894 (1950) - Published 1 December, 1950

Letters to the Editor

Production of a $π^{+}$ Meson Beam Using the Deflected Proton Beam of the 184-Inch Synchro-Cyclotron

C. Richman, M. Skinner, J. Merritt, and B. Youtz

Phys. Rev. 80, 900 (1950) - Published 1 December, 1950

A Geometrical Model for the Unified Theory of Physical Fields

J. I. Horváth

Phys. Rev. 80, 901 (1950) - Published 1 December, 1950

The Diamagnetic Correction for Protons in Water and Mineral Oil

H. A. Thomas

Phys. Rev. 80, 901 (1950) - Published 1 December, 1950

Spectrum of the Boron Monosulfide (BS) Molecule

P. B. Zeeman

Phys. Rev. 80, 902 (1950) - Published 1 December, 1950

The Slow Neutron Resonant Scattering of Gold

J. Tittman, C. Sheer, J. Rainwater, and W. W. Havens, Jr.

Phys. Rev. 80, 903 (1950) - Published 1 December, 1950

Screening of Electronic Interactions in a Metal

David Bohm and David Pines

Phys. Rev. 80, 903 (1950) - Published 1 December, 1950

Neutron Yield from ${Be}^{9} (γ, n) {Be}^{8}$ Reaction

G. J. Hine and F. E. Senftle

Phys. Rev. 80, 904 (1950) - Published 1 December, 1950

Half-Life of ${Cu}^{66}$

A. G. W. Cameron and L. Katz

Phys. Rev. 80, 904 (1950) - Published 1 December, 1950

Stars Induced by 350- to 400-Mev Protons

G. Bernardini, E. T. Booth, and S. J. Lindenbaum

Phys. Rev. 80, 905 (1950) - Published 1 December, 1950

The Nuclear Spin of ${}_{43}{Tc}^{99}$

Karl G. Kessler and William F. Meggers

Phys. Rev. 80, 905 (1950) - Published 1 December, 1950

ERRATA

Erratum: Nuclear Isomerism and Shell Structure

R. D. Hill

Phys. Rev. 80, 906 (1950) - Published 1 December, 1950

Letters to the Editor

On the $π$ -Meson Absorption and Emission Mechanisms in Nuclei

P. Cüer

Phys. Rev. 80, 906 (1950) - Published 1 December, 1950

Noise Temperature of a D.C. Gas Discharge Plasma

Shoji Kojima and Kazuo Takayama

Phys. Rev. 80, 907 (1950) - Published 1 December, 1950

Fluorescent Decay of Scintillation Crystals

S. H. Liebson, M. E. Bishop, and J. O. Elliot

Phys. Rev. 80, 907 (1950) - Published 1 December, 1950

The Thermal Neutron Absorption Cross Section of Silicon

C. W. Tittle and Henry Faul

Phys. Rev. 80, 908 (1950) - Published 1 December, 1950

The Gamma-Ray Spectrum of ${Ba}^{131}$

E. L. Zimmerman, E. B. Dale, D. G. Thomas, and J. D. Kurbatov

Phys. Rev. 80, 908 (1950) - Published 1 December, 1950

On the Radioactivity of Potassium

M. Ceccarelli, G. Quareni, and A. Rostagni

Phys. Rev. 80, 909 (1950) - Published 1 December, 1950

Microwave Resonance Absorption of NiO ${Fe}_{2}$ $O_{3}$

Tosihiko Okamura, Yosiharu Torizuka, and Yūzō Kojima

Phys. Rev. 80, 910 (1950) - Published 1 December, 1950

Microwave Spectroscopic Evidence for Internal Rotation in Methyl Silane

David R. Lide and Donald K. Coles

Phys. Rev. 80, 911 (1950) - Published 1 December, 1950

An Empirical Correlation Among Superconductors

J. G. Daunt

Phys. Rev. 80, 911 (1950) - Published 1 December, 1950

On the Cohesive Energy of Metallic Lithium

R. A. Silverman and W. Kohn

Phys. Rev. 80, 912 (1950) - Published 1 December, 1950

Remarks on the Nuclear Resonance Shift in Metallic Lithium

W. Kohn and N. Bloembergen

Phys. Rev. 80, 913 (1950) - Published 1 December, 1950

The Nature of Wide-Angle Sprays. I

R. Ronald Rau

Phys. Rev. 80, 914 (1950) - Published 1 December, 1950

The Nature of Wide-Angle Sprays. II

R. Ronald Rau and A. S. Wightman

Phys. Rev. 80, 914 (1950) - Published 1 December, 1950

On the Half-Life of Actinium

J. M. Hollander and R. F. Leininger

Phys. Rev. 80, 915 (1950) - Published 1 December, 1950

Large Angle Scattering of $π^{-}$ -Mesons

H. Bradner and B. Rankin

Phys. Rev. 80, 916 (1950) - Published 1 December, 1950

The Branching Ratio of $K^{40}$ Radioactive Decay

Mark G. Inghram, Harrison Brown, Clair Patterson, and David C. Hess

Phys. Rev. 80, 916 (1950) - Published 1 December, 1950

The Precision Determination of Some Half-Lives

James W. Cobble and R. W. Atteberry

Phys. Rev. 80, 917 (1950) - Published 1 December, 1950

The Virial Theorem and the Variation Principle

Irvin Isenberg

Phys. Rev. 80, 917 (1950) - Published 1 December, 1950

Note on the Inertia and Damping Constant of Ferromagnetic Domain Boundaries

C. Kittel

Phys. Rev. 80, 918 (1950) - Published 1 December, 1950

Radiative Capture of Neutrons in Deuterium

B. B. Kinsey and G. A. Bartholomew

Phys. Rev. 80, 918 (1950) - Published 1 December, 1950

Pressure Dependence of Resistance of Germanium

Julius H. Taylor

Phys. Rev. 80, 919 (1950) - Published 1 December, 1950

Penetrating Showers of Cosmic Rays

André G. Voisin

Phys. Rev. 80, 920 (1950) - Published 1 December, 1950

High Energy Neutron Scattering by Nuclei

Simon Pasternack and Hartland S. Snyder

Phys. Rev. 80, 921 (1950) - Published 1 December, 1950

Penetrating Showers from Lithium

W. B. Fretter

Phys. Rev. 80, 921 (1950) - Published 1 December, 1950

Two Comments on the Limits of Validity of the P. R. Weiss Theory of Ferromagnetism

P. W. Anderson

Phys. Rev. 80, 922 (1950) - Published 1 December, 1950

Two-Fluid Theory of Liquid Helium II below 1°K

S. Nakajima and M. Shimizu

Phys. Rev. 80, 923 (1950) - Published 1 December, 1950

A 1.7× $10^{- 9}$ -Sec. Isomeric State in ${}_{68}{Er}^{166}$

F. K. McGowan

Phys. Rev. 80, 923 (1950) - Published 1 December, 1950

Nuclear Interaction of $π^{-}$ -Mesons

G. Bernardini, E. T. Booth, L. Lederman, and J. Tinlot

Phys. Rev. 80, 924 (1950) - Published 1 December, 1950

Secondary Electron Emission and Atomic Shell Structure

E. J. Sternglass

Phys. Rev. 80, 925 (1950) - Published 1 December, 1950

Proceedings of the American Physical Society

Minutes of the 1950 Autumn Meeting of the New York State Section at Potsdam

Phys. Rev. 80, 927 (1950) - Published 1 December, 1950