Volume 81, Issue 6

March 1951

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ARTICLES

The Altitude and Latitude Variation in the Rate of Occurrence of Nuclear Disintegrations Produced in the Stratosphere by Cosmic Rays

J. J. Lord

Phys. Rev. 81, 901 (1951) - Published 15 March, 1951

Low States of ${Li}^{7}$ in Intermediate Coupling

H. H. Hummel and D. R. Inglis

Phys. Rev. 81, 910 (1951) - Published 15 March, 1951

The $B^{10} (n, α)$ Reaction and the Low Excited State of ${Li}^{7}$

D. R. Inglis

Phys. Rev. 81, 914 (1951) - Published 15 March, 1951

Variation with Energy of Nuclear Collision Cross Sections for High Energy Neutrons

J. DeJuren and B. J. Moyer

Phys. Rev. 81, 919 (1951) - Published 15 March, 1951

The Production of Mesons by Protons on Deuterons

H. P. Noyes

Phys. Rev. 81, 924 (1951) - Published 15 March, 1951

The Angular Distribution of Photo-Protons from Deuterium

Gerson Goldhaber

Phys. Rev. 81, 930 (1951) - Published 15 March, 1951

Renormalization of Neutral Mesons in Three-Field Problems

P. T. Matthews

Phys. Rev. 81, 936 (1951) - Published 15 March, 1951

The Nuclear Spins and Quadrupole Moments of Stable Germanium Isotopes

J. M. Mays and C. H. Townes

Phys. Rev. 81, 940 (1951) - Published 15 March, 1951

Note on Higher Order Effects in Beta-Decay

Eugen Merzbacher

Phys. Rev. 81, 942 (1951) - Published 15 March, 1951

Covariant Transformation Law for the Field Equations

Jack Heller

Phys. Rev. 81, 946 (1951) - Published 15 March, 1951

The Mass of $S^{35}$ from Microwave Spectroscopy

Tunis Wentink, Jr., Walter S. Koski, and Victor W. Cohen

Phys. Rev. 81, 948 (1951) - Published 15 March, 1951

Photo-Activation of Bismuth

Nathan Sugarman and Robert Peters

Phys. Rev. 81, 951 (1951) - Published 15 March, 1951

Observations on Lithium and Beryllium Nuclei Ejected from Heavy Nuclei by High Energy Particles

Luis Marquez and I. Perlman

Phys. Rev. 81, 953 (1951) - Published 15 March, 1951

Long-Lived ${Bi}^{207}$ and Energy Levels of ${Pb}^{207}$

H. M. Neumann and I. Perlman

Phys. Rev. 81, 958 (1951) - Published 15 March, 1951

On the Systematics of Even-Even Alpha-Emitters

Irving Kaplan

Phys. Rev. 81, 962 (1951) - Published 15 March, 1951

Determination of the Number of Neutrons Associated with the Stoppage of Negative $μ$ -Mesons in Lead

Gerhart Groetzinger, Martin J. Berger, and Gordon W. McClure

Phys. Rev. 81, 969 (1951) - Published 15 March, 1951

High Energy Photo-Nuclear Reactions

Karl Strauch

Phys. Rev. 81, 973 (1951) - Published 15 March, 1951

Effective Photon Energies of High Energy Photo-Nuclear Reactions

Leonard Eyges

Phys. Rev. 81, 981 (1951) - Published 15 March, 1951

A Theory of Cooperative Phenomena

Ryoichi Kikuchi

Phys. Rev. 81, 988 (1951) - Published 15 March, 1951

Photo-Mesons from Carbon

J. M. Peterson, W. S. Gilbert, and R. S. White

Phys. Rev. 81, 1003 (1951) - Published 15 March, 1951

The Piezoelectric Constant of Zinc-Sulfide

B. D. Saksena

Phys. Rev. 81, 1012 (1951) - Published 15 March, 1951

A Note on the Ground State in Antiferromagnetics

J. M. Luttinger

Phys. Rev. 81, 1015 (1951) - Published 15 March, 1951

Interaction of Slow Electrons and Surface Films of Ionic Crystals

Harold Jacobs and Dietrich Dobischek

Phys. Rev. 81, 1019 (1951) - Published 15 March, 1951

Conservation Laws in the General Theory of Relativity with Electromagnetic Field

Henry Zatzkis

Phys. Rev. 81, 1023 (1951) - Published 15 March, 1951

Electron Loss Cross Sections for Hydrogen Atoms Passing through Hydrogen Gas

J. H. Montague

Phys. Rev. 81, 1026 (1951) - Published 15 March, 1951

Calculations of Surface Energy for a Free-Electron Metal

H. B. Huntington

Phys. Rev. 81, 1035 (1951) - Published 15 March, 1951

A Direct Determination of the Magnetic Moment of the Protons in Units of the Nuclear Magneton

C. D. Jeffries

Phys. Rev. 81, 1040 (1951) - Published 15 March, 1951

Letters to the Editor

Production of $μ$ -Mesons by Gamma-Rays

Peter A. Wolff

Phys. Rev. 81, 1056 (1951) - Published 15 March, 1951

Disintegrations of ${Nd}^{147}$ and ${Pm}^{149}$

Evani Kondaiah

Phys. Rev. 81, 1056 (1951) - Published 15 March, 1951

$K^{40}$ and the Age of the Atmosphere

K. F. Chackett

Phys. Rev. 81, 1057 (1951) - Published 15 March, 1951

Radioactive Strontium Produced by Deuteron Bombardment of Rubidium

Michel Ter-Pogossian and Fred T. Porter

Phys. Rev. 81, 1057 (1951) - Published 15 March, 1951

Resonance in Antiferromagnetics

K. W. H. Stevens

Phys. Rev. 81, 1058 (1951) - Published 15 March, 1951

Positron Search in $K^{40}$

Myron L. Good

Phys. Rev. 81, 1058 (1951) - Published 15 March, 1951

Measurement of Semiconductor Impurity Content

Carl N. Klahr and L. P. Hunter

Phys. Rev. 81, 1059 (1951) - Published 15 March, 1951

The Mechanism of Star Production by Gamma-Rays

Seishi Kikuchi

Phys. Rev. 81, 1060 (1951) - Published 15 March, 1951

A Note on Exchange Magnetic Moments

G. J. Kynch

Phys. Rev. 81, 1060 (1951) - Published 15 March, 1951

The Deuteron Quadrupole Moment and the Radiofrequency Spectra of $H_{2}$ and $D_{2}$ in Low Magnetic Fields

H. G. Kolsky, T. E. Phipps, Jr., N. F. Ramsey, and H. B. Silsbee

Phys. Rev. 81, 1061 (1951) - Published 15 March, 1951

Masses of Al, Si, P, and S Isotopes

Henry T. Morz

Phys. Rev. 81, 1061 (1951) - Published 15 March, 1951

Radiations of ${Nd}^{147}$

W. S. Emmerich and J. D. Kurbatov

Phys. Rev. 81, 1062 (1951) - Published 15 March, 1951

Electron-Electron Scattering from 0.6 to 1.7 Mev

Lorne A. Page

Phys. Rev. 81, 1062 (1951) - Published 15 March, 1951

The Positron Activity of $K^{40}$

Stirling A. Colgate

Phys. Rev. 81, 1063 (1951) - Published 15 March, 1951

The Dielectric Properties of BaTi $O_{3}$ at Low Temperatures

Walter J. Merz

Phys. Rev. 81, 1064 (1951) - Published 15 March, 1951

The Intensity of the Total and of the Hard Component of the Cosmic Radiation as a Function of Altitude at Geomagnetic Latitudes of 28° N and 55° N

M. Vidale and Marcel Schein

Phys. Rev. 81, 1065 (1951) - Published 15 March, 1951

An 8× $10^{- 10}$ -Sec Isomeric State in ${}_{76}{Os}^{186}$

F. K. McGowan

Phys. Rev. 81, 1066 (1951) - Published 15 March, 1951

On the Spin and Magnetic Moment of $O^{17}$

F. Alder and F. C. Yu

Phys. Rev. 81, 1067 (1951) - Published 15 March, 1951

Scintillation Counting of Cosmic-Ray Particles

E. P. Ney and D. M. Thon

Phys. Rev. 81, 1068 (1951) - Published 15 March, 1951

A Scintillation Counter Measurement of Heavy Nuclei

E. P. Ney and D. M. Thon

Phys. Rev. 81, 1069 (1951) - Published 15 March, 1951

Non-Equilibrium Thermodynamics of Two-Fluid Models

S. R. de Groot, L. Jansen, and P. Mazur

Phys. Rev. 81, 1070 (1951) - Published 15 March, 1951

Field Variation of Superconducting Penetration Depth

J. Bardeen

Phys. Rev. 81, 1070 (1951) - Published 15 March, 1951

Magic Numbers and the Missing Elements Technetium and Promethium

Hans E. Suess

Phys. Rev. 81, 1071 (1951) - Published 15 March, 1951

On the Radioactivity of ${Hf}^{181}$ and ${Hf}^{175}$

Arne Hedgran and Sigvard Thulin

Phys. Rev. 81, 1072 (1951) - Published 15 March, 1951