Volume 81, Issue 5

March 1951

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ARTICLES

A Cloud-Chamber Study of Nuclear Interactions in Lead and Aluminum. Part I

B. P. Gregory and J. H. Tinlot

Phys. Rev. 81, 667 (1951) - Published 1 March, 1951

A Cloud-Chamber Study of Nuclear Interactions in Lead and Aluminum. Part II

B. P. Gregory and J. H. Tinlot

Phys. Rev. 81, 675 (1951) - Published 1 March, 1951

Angular Distribution of the Pions Produced in High Energy Nuclear Collisions

Enrico Fermi

Phys. Rev. 81, 683 (1951) - Published 1 March, 1951

Relative High Energy Neutron Yields from Targets Bombarded with Protons and Deuterons

William J. Knox

Phys. Rev. 81, 687 (1951) - Published 1 March, 1951

Multiple Traversals of High Energy Particles in a Cyclotron Beam through Thin Targets

W. J. Knox

Phys. Rev. 81, 693 (1951) - Published 1 March, 1951

Exciton-Enhanced Photoelectric Emission from $F$ -Centers in RbI near 85°K

L. Apker and E. Taft

Phys. Rev. 81, 698 (1951) - Published 1 March, 1951

Mechanism of Exciton-Enhanced Photoelectric Emission in Alkali Halides

Malcolm H. Hebb

Phys. Rev. 81, 702 (1951) - Published 1 March, 1951

Consequences of Guage Invariance for Radiative Transitions

R. G. Sachs and N. Austern

Phys. Rev. 81, 705 (1951) - Published 1 March, 1951

Interaction Effects on Radiative Transitions in Nuclei

N. Austern and R. G. Sachs

Phys. Rev. 81, 710 (1951) - Published 1 March, 1951

The Time Average Magnetic Field at the Nucleus in Nuclear Magnetic Resonance Experiments

W. C. Dickinson

Phys. Rev. 81, 717 (1951) - Published 1 March, 1951

An Increase of the Primary Cosmic-Ray Intensity Following a Solar Flare

Martin A. Pomerantz

Phys. Rev. 81, 731 (1951) - Published 1 March, 1951

Radioactivity of ${Ag}^{111}$ , ${Cd}^{111}$ , ${In}^{111}$ , and ${Sn}^{111}$

C. L. McGinnis

Phys. Rev. 81, 734 (1951) - Published 1 March, 1951

Half-Life of the Long-Lived ${Tc}^{99}$

Sherman Fried, A. H. Jaffey, N. F. Hall, and L. E. Glendenin

Phys. Rev. 81, 741 (1951) - Published 1 March, 1951

The Reaction Energies of Light Nuclei from Magnetic Analysis

E. N. Strait, D. M. Van Patter, W. W. Buechner, and A. Sperduto

Phys. Rev. 81, 747 (1951) - Published 1 March, 1951

Neutron-Deuteron Scattering at High Energy

R. L. Gluckstern and H. A. Bethe

Phys. Rev. 81, 761 (1951) - Published 1 March, 1951

Artificial Chains Collateral to the Heavy Radioactive Families

W. W. Meinke, A. Ghiorso, and G. T. Seaborg

Phys. Rev. 81, 782 (1951) - Published 1 March, 1951

Microwave Spectrum of Phosphine, Arsine, and Stibine

C. C. Loomis and M. W. P. Strandberg

Phys. Rev. 81, 798 (1951) - Published 1 March, 1951

Radiative Processes in the Presence of Heavy Nuclei

G. Parzen

Phys. Rev. 81, 808 (1951) - Published 1 March, 1951

Determination of the Photo-Nuclear Cross Sections $S^{32} (γ, d) P^{30}$ , $S^{32} (γ, n p) P^{30}$ , and $P^{31} (γ, n) P^{30}$

L. Katz and A. S. Penfold

Phys. Rev. 81, 815 (1951) - Published 1 March, 1951

Microwave Spectrum and Molecular Structure of Ge $F_{3}$ Cl

Wallace E. Anderson, John Sheridan, and Walter Gordy

Phys. Rev. 81, 819 (1951) - Published 1 March, 1951

The Spectrum of Iodine Excited in the Presence of Argon

Putcha Venkateswarlu

Phys. Rev. 81, 821 (1951) - Published 1 March, 1951

Relation between Lattice Vibration and London Theories of Superconductivity

J. Bardeen

Phys. Rev. 81, 829 (1951) - Published 1 March, 1951

The Mobility and Life of Injected Holes and Electrons in Germanium

J. R. Haynes and W. Shockley

Phys. Rev. 81, 835 (1951) - Published 1 March, 1951

The Theory of the Separation of Isotopes by Thermal Diffusion

Sudhansu Datta Majumdar

Phys. Rev. 81, 844 (1951) - Published 1 March, 1951

On the Definition and Approximation of Feynman's Path Integrals

Cécile Morette

Phys. Rev. 81, 848 (1951) - Published 1 March, 1951

Fluorescence of Solutions Bombarded with High Energy Radiation (Energy Transport in Liquids) Part II

Hartmut Kallmann and Milton Furst

Phys. Rev. 81, 853 (1951) - Published 1 March, 1951

Polarizabilities of Ions in Perovskite-Type Crystals

Shepard Roberts

Phys. Rev. 81, 865 (1951) - Published 1 March, 1951

On the Theory of Spin Waves in Ferromagnetic Media

Conyers Herring and Charles Kittel

Phys. Rev. 81, 869 (1951) - Published 1 March, 1951

Letters to the Editor

Products of the High Energy Helium Ion and Deuteron Bombardment of Tungsten

S. E. Turner and L. O. Morgan

Phys. Rev. 81, 881 (1951) - Published 1 March, 1951

Significance of Composition of Contact Point in Rectifying Junctions on Germanium

W. G. Pfann

Phys. Rev. 81, 882 (1951) - Published 1 March, 1951

Microwave Study of Ge, Si, and S Masses

S. Geschwind and R. Gunther-Mohr

Phys. Rev. 81, 882 (1951) - Published 1 March, 1951

Lattice Defects in Silver Bromide

H. Kanzaki

Phys. Rev. 81, 884 (1951) - Published 1 March, 1951

On the Aggregation of Trapping Centers in Semiconductors or Insulators

Tadatosi Hibi and Tetsuo Matsumura

Phys. Rev. 81, 884 (1951) - Published 1 March, 1951

The Determination of the Energy of a Ferromagnetic Domain Boundary

Harvey Kaplan

Phys. Rev. 81, 885 (1951) - Published 1 March, 1951

The Spin of ${Be}^{9}$

N. A. Schuster and G. E. Pake

Phys. Rev. 81, 886 (1951) - Published 1 March, 1951

Magnetic Domain Patterns on Nickel Crystals

Mikio Yamamoto and Takao Iwata

Phys. Rev. 81, 887 (1951) - Published 1 March, 1951

Paramagnetic Resonance in Metal Ammonia Solutions at Very Low Fields

Martin A. Garstens and Alden H. Ryan

Phys. Rev. 81, 888 (1951) - Published 1 March, 1951

Heat Production in Potassium

David E. Alburger

Phys. Rev. 81, 888 (1951) - Published 1 March, 1951

Periodic Deviations in the Schottky Effect for Polished Tantalum

G. B. Finn, W. B. LaBerge, and E. A. Coomes

Phys. Rev. 81, 889 (1951) - Published 1 March, 1951

The Latitude Effect of Cosmic-Ray Neutrons

W. P. Staker, M. Pavalow, and S. A. Korff

Phys. Rev. 81, 889 (1951) - Published 1 March, 1951

Multiple Scattering of Fast Particles in Photographic Emulsions

L. Voyvodic and E. Pickup

Phys. Rev. 81, 890 (1951) - Published 1 March, 1951

The Strength of Interstellar Magnetic Fields

Leverett Davis, Jr.

Phys. Rev. 81, 890 (1951) - Published 1 March, 1951

Scintillation Pulse Sizes of Solid Noncrystalline-Type Phosphors

M. G. Schorr and E. C. Farmer

Phys. Rev. 81, 891 (1951) - Published 1 March, 1951

Gamma-Ray Spectrum of $K^{40}$

Myron L. Good

Phys. Rev. 81, 891 (1951) - Published 1 March, 1951

The Fast Neutron Disintegration of $C^{12}$ and $B^{10}$

J. L. Perkin

Phys. Rev. 81, 892 (1951) - Published 1 March, 1951

Fission in ${Am}^{242}$

G. C. Hanna, B. G. Harvey, N. Moss, and P. R. Tunnicliffe

Phys. Rev. 81, 893 (1951) - Published 1 March, 1951

Note on Soft Gamma-Component of Cosmic Rays

F. G. Rest, L. Reiffel, and C. A. Stone

Phys. Rev. 81, 894 (1951) - Published 1 March, 1951

Detection of Positive $π$ -Mesons by $π^{+}$ Decay

M. Jakobson, A. Schulz, and J. Steinberger

Phys. Rev. 81, 894 (1951) - Published 1 March, 1951

The Neutrons from the Nucleonic Component as an Indicator of Changes in Primary Intensities

J. A. Simpson, Jr.

Phys. Rev. 81, 895 (1951) - Published 1 March, 1951

Magnetic Moment of the Deuteron

B. Smaller, E. Yasaitis, and H. L. Anderson

Phys. Rev. 81, 896 (1951) - Published 1 March, 1951

A Model for Photo-Nuclear Reactions

Luis Marquez

Phys. Rev. 81, 897 (1951) - Published 1 March, 1951

On the Branching Ratio of the $π^{+}$ Meson

Frances M. Smith

Phys. Rev. 81, 897 (1951) - Published 1 March, 1951

Neutron Capture Cross Sections and Level Density

H. Hurwitz, Jr. and H. A. Bethe

Phys. Rev. 81, 898 (1951) - Published 1 March, 1951

An Investigation of the Existence of a Sodium Lithium Molecule

B. B. Phillips, H. M. Froslie, and R. H. McFarland

Phys. Rev. 81, 898 (1951) - Published 1 March, 1951

Photo-Production of Neutral Mesons in Nuclear Electric Fields and the Mean Life of the Neutral Meson

H. Primakoff

Phys. Rev. 81, 899 (1951) - Published 1 March, 1951