Volume 89, Issue 3

February 1953

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ARTICLES

The Internal Pair Production of $γ$ -Rays of Mesonic Origin; Alternate Modes of $π^{0}$ Decay

P. Lindenfeld, A. Sachs, and J. Steinberger

Phys. Rev. 89, 531 (1953) - Published 1 February, 1953

The Blocked Capillary Method for Determining Melting Pressures: The Melting Curve of Helium from 1.5° to 4°K

C. A. Swenson

Phys. Rev. 89, 538 (1953) - Published 1 February, 1953

$Z$ -Dependence of the Pair Production Cross Section at 1.33 and 2.62 Mev

Irving E. Dayton

Phys. Rev. 89, 544 (1953) - Published 1 February, 1953

Radiochemical Studies on the Fission of ${Th}^{232}$ with Li+D Neutrons

A. Turkevich, J. B. Niday, and Althea Tompkins

Phys. Rev. 89, 552 (1953) - Published 1 February, 1953

Ionization Probability Curves for Krypton and Xenon near Threshold

R. E. Fox, W. M. Hickam, and T. Kjeldaas, Jr.

Phys. Rev. 89, 555 (1953) - Published 1 February, 1953

Gamma-Radiations from ${Zr}^{95}$ and ${Nb}^{95}$

C. E. Mandeville, E. Shapiro, R. I. Mendenhall, E. R. Zucker, and G. L. Conklin

Phys. Rev. 89, 559 (1953) - Published 1 February, 1953

Neutron Scattering by Coupled Paramagnetic Ions

Philip J. Bendt

Phys. Rev. 89, 561 (1953) - Published 1 February, 1953

Genetics of the ${Ge}^{78}$ — ${As}^{78}$ Fission Chain

Nathan Sugarman

Phys. Rev. 89, 570 (1953) - Published 1 February, 1953

The Isomer ${Rb}^{84 m}$

R. S. Caird and Allan C. G. Mitchell

Phys. Rev. 89, 573 (1953) - Published 1 February, 1953

Multiple Scattering and the Many-Body Problem—Applications to Photomeson Production in Complex Nuclei

Kenneth M. Watson

Phys. Rev. 89, 575 (1953) - Published 1 February, 1953

A Quasi-Relativistic Theory of Gravitation

Marvin G. Moore

Phys. Rev. 89, 587 (1953) - Published 1 February, 1953

Pion-Nucleon Scattering When the Coupling Is Weak and Extended

Geoffrey F. Chew

Phys. Rev. 89, 591 (1953) - Published 1 February, 1953

Heat Conduction of the Boundary Layer in Liquid Helium II

David White, O. D. Gonzales, and H. L. Johnston

Phys. Rev. 89, 593 (1953) - Published 1 February, 1953

Nuclear Gyromagnetic Ratios. IV

Yu Ting and Dudley Williams

Phys. Rev. 89, 595 (1953) - Published 1 February, 1953

Some Points of the Theory of Liquid Helium II

Louis Goldstein

Phys. Rev. 89, 597 (1953) - Published 1 February, 1953

High Energy Photoproton Production by 322-Mev Bremsstrahlung

J. W. Rosengren and J. M. Dudley

Phys. Rev. 89, 603 (1953) - Published 1 February, 1953

Hyperfine Structure in the Paramagnetic Resonance of the Ion ${(S O_{3})}_{2}$ N $O^{- -}$

J. Townsend, S. I. Weissman, and G. E. Pake

Phys. Rev. 89, 606 (1953) - Published 1 February, 1953

Electron-Induced Showers in Copper

Asher Kantz and Robert Hofstadter

Phys. Rev. 89, 607 (1953) - Published 1 February, 1953

The Gyromagnetic Ratio of Supermalloy

G. G. Scott

Phys. Rev. 89, 618 (1953) - Published 1 February, 1953

The Symmetry of the $S$ Matrix

F. Coester

Phys. Rev. 89, 619 (1953) - Published 1 February, 1953

The ${Zr}^{92}$ — ${Mo}^{92}$ and ${Zr}^{94}$ — ${Mo}^{94}$ Pairs and the ${Zr}^{96}$ — ${Mo}^{96}$ — ${Ru}^{96}$ Triplet

James S. Geiger, Benjamin G. Hogg, Henry E. Duckworth, and John W. Dewdney

Phys. Rev. 89, 621 (1953) - Published 1 February, 1953

Magnetic Crystal Anisotropy and Magnetostriction of Iron-Nickel Alloys

R. M. Bozorth and J. G. Walker

Phys. Rev. 89, 624 (1953) - Published 1 February, 1953

The Spectrum of Discrete Eigenvalues in a Negative Atomic Ion

Ta-You Wu

Phys. Rev. 89, 629 (1953) - Published 1 February, 1953

Variations in Isotopic Abundances of Strontium

L. T. Aldrich, L. F. Herzog, W. K. Holyk, F. B. Whiting, and L. H. Ahrens

Phys. Rev. 89, 631 (1953) - Published 1 February, 1953

Magnetic Susceptibility of a Diamagnetic Electron Gas—The Role of Small Effective Electron Mass

E. N. Adams, II

Phys. Rev. 89, 633 (1953) - Published 1 February, 1953

The Proton-Proton Reaction and Energy Production in the Sun

E. A. Frieman and L. Motz

Phys. Rev. 89, 648 (1953) - Published 1 February, 1953

Interpretation of $α$ -Values in $p - n$ Junction Transistors

F. S. Goucher and M. B. Prince

Phys. Rev. 89, 651 (1953) - Published 1 February, 1953

Letters to the Editor

Some Properties of Superconductors below 1°K

T. S. Smith, W. B. Gager, and J. G. Daunt

Phys. Rev. 89, 654 (1953) - Published 1 February, 1953

Air Mass between an Observer and Outer Space

E. C. Pressly

Phys. Rev. 89, 654 (1953) - Published 1 February, 1953

The Electric Scattering of Deuterons

U. E. Kruse, N. F. Ramsey, and B. J. Malenka

Phys. Rev. 89, 655 (1953) - Published 1 February, 1953

Search for " $T$ -Tracks" in Photographic Plates

Paul H. Barrett, G. Cocconi, and Y. Eisenberg

Phys. Rev. 89, 656 (1953) - Published 1 February, 1953

The Lattice Expansion of Quartz Due to Fast Neutron Bombardment

M. Wittels

Phys. Rev. 89, 656 (1953) - Published 1 February, 1953

The Thermal Neutron Absorption Cross Section of Scandium

E. E. Lockett and E. Bowell

Phys. Rev. 89, 657 (1953) - Published 1 February, 1953

Intensities of Nuclear Magnetic Resonances in Cubic Crystals

G. D. Watkins and R. V. Pound

Phys. Rev. 89, 658 (1953) - Published 1 February, 1953

The Cross Section for ${Ta}^{181} (γ, 2 n) {Ta}^{179}$ at 17.6 Mev

J. H. Carver, R. D. Edge, and D. H. Wilkinson

Phys. Rev. 89, 658 (1953) - Published 1 February, 1953

A Theory of the Paramagnetism of Uranyl-Like Ions

R. J. Elliott

Phys. Rev. 89, 659 (1953) - Published 1 February, 1953

Influence of Electric Fields on Luminescence

Frank Matossi and Sol Nudelman

Phys. Rev. 89, 660 (1953) - Published 1 February, 1953

Anisotropic Susceptibility of Polycrystalline Graphite

W. P. Eatherly and J. D. McClelland

Phys. Rev. 89, 661 (1953) - Published 1 February, 1953

The Statistics of a Two-Dimensional, Hexagonal Net

J. P. Hobson and W. A. Nierenberg

Phys. Rev. 89, 662 (1953) - Published 1 February, 1953

Normal Fluid Concentration in Liquid Helium II below 1°K

D. de Klerk, R. P. Hudson, and J. R. Pellam

Phys. Rev. 89, 662 (1953) - Published 1 February, 1953

Effects of $F$ Centers on the Internal Friction of Rocksalt Single Crystals

D. R. Frankl and T. A. Read

Phys. Rev. 89, 663 (1953) - Published 1 February, 1953

Saturation in the X-Ray Coloration of Corundum Single Crystals

R. Allan Hunt and Robert H. Schuler

Phys. Rev. 89, 664 (1953) - Published 1 February, 1953

The Angular Momenta of the Excited States of ${Pt}^{196}$

Rolf M. Steffen

Phys. Rev. 89, 665 (1953) - Published 1 February, 1953

States of $S^{33}$ and ${Si}^{29}$ from ( $d, p$ ) Stripping

J. R. Holt and T. N. Marsham

Phys. Rev. 89, 665 (1953) - Published 1 February, 1953