Volume 186, Issue 2

October 1969

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ARTICLES

Measurements and Calculations of Critical Angles for Planar Channeling

S. T. Picraux and J. U. Andersen

Phys. Rev. 186, 267 (1969) - Published 10 October, 1969

Calculation of Electronic States of ${Li}_{2}^{+}$ as a Free Ion and in a Point-Ion Lattice

C. R. Fischer and P. J. Kemmey

Phys. Rev. 186, 272 (1969) - Published 10 October, 1969

Energy Levels of ${Ce}^{2 +}$ in Ca $F_{2}$

R. C. Alig, Z. J. Kiss, J. P. Brown, and D. S. McClure

Phys. Rev. 186, 276 (1969) - Published 10 October, 1969

Nuclear-Magnetic-Resonance Studies of ${Fe}^{57}$ in Barium Ferrite

R. L. Streever

Phys. Rev. 186, 285 (1969) - Published 10 October, 1969

Microscopic Inhomogeneous Broadening and Nuclear Spin-Spin Interactions

D. Hone, V. Jaccarino, Tin Ngwe, and P. Pincus

Phys. Rev. 186, 291 (1969) - Published 10 October, 1969

Mössbauer Diffraction. II. Dynamical Theory of Mössbauer Optics

J. P. Hannon and G. T. Trammell

Phys. Rev. 186, 306 (1969) - Published 10 October, 1969

Change in Nuclear Radius upon Excitation for ${}^{119}{Sn}$ , ${}^{121}{Sb}$ , ${}^{125}{Te}$ , ${}^{127, 129}I$ , and ${}^{129}{Xe}$ from Mössbauer Isomer Shifts

S. L. Ruby and G. K. Shenoy

Phys. Rev. 186, 326 (1969) - Published 10 October, 1969

Optical Emission Spectrum of ${Cr}^{3 +}$ - ${Eu}^{3 +}$ Pairs in Europium Gallium Garnet

J. P. van der Ziel and L. G. Van Uitert

Phys. Rev. 186, 332 (1969) - Published 10 October, 1969

Line Strengths of the ${}^{6}P$ Multiplets of ${Gd}^{3 +}$ in Ca $F_{2}$ at Cubic Sites

John A. Detrio

Phys. Rev. 186, 339 (1969) - Published 10 October, 1969

Infrared Laser Action in Sr Vapor Resulting from Optical Pumping and Inelastic Collisions

P. P. Sorokin and J. R. Lankard

Phys. Rev. 186, 342 (1969) - Published 10 October, 1969

Particle Tracks in Emulsion

Robert Katz and E. J. Kobetich

Phys. Rev. 186, 344 (1969) - Published 10 October, 1969

Perturbing Effect of Two Rotating Fields on Angular Correlations

R. R. Lewis, Jr.

Phys. Rev. 186, 352 (1969) - Published 10 October, 1969

Hyperfine Interactions in Europium Iron Garnet

M. Stachel, S. Hüfner, G. Crecelius, and D. Quitmann

Phys. Rev. 186, 355 (1969) - Published 10 October, 1969

Observation of Two Charged States of a Nickel-Oxygen Vacancy Pair in SrTi $O_{3}$ by Paramagnetic Resonance

K. A. Müller, W. Berlinger, and R. S. Rubins

Phys. Rev. 186, 361 (1969) - Published 10 October, 1969

Stopping Power of Zr, Gd, and Ta for 5-12-MeV Protons and Deuterons. Further Evidence of an Oscillatory Behavior of the Excitation Potential

H. H. Andersen, H. Simonsen, H. Sørensen, and P. Vajda

Phys. Rev. 186, 372 (1969) - Published 10 October, 1969

Positron Effective Mass in an Electron Gas

Birger Bergersen and Erkki Pajanne

Phys. Rev. 186, 375 (1969) - Published 10 October, 1969

Nuclear Zeeman Effect in $W^{182}$ in Iron

R. B. Frankel, Y. Chow, L. Grodzins, and J. Wulff

Phys. Rev. 186, 381 (1969) - Published 10 October, 1969

Spectral Broadening of Europium Ions in Glass

D. K. Rice and L. G. DeShazer

Phys. Rev. 186, 387 (1969) - Published 10 October, 1969

Noise in a Driven Josephson Oscillator

Michael J. Stephen

Phys. Rev. 186, 393 (1969) - Published 10 October, 1969

Tunneling Investigation of Energy-Gap Anisotropy in Superconducting Bulk Pb

B. L. Blackford and R. H. March

Phys. Rev. 186, 397 (1969) - Published 10 October, 1969

Temperature Dependence of the Infrared Divergence in the Degenerate Fermi Gas

Richard A. Ferrell

Phys. Rev. 186, 399 (1969) - Published 10 October, 1969

Low-Frequency Response Function of a Superconductor at Finite Temperature

A. Bardasis

Phys. Rev. 186, 402 (1969) - Published 10 October, 1969

Electron Correlational Effects on Plasmon Damping and Ultraviolet Absorption in Metals

D. F. DuBois and M. G. Kivelson

Phys. Rev. 186, 409 (1969) - Published 10 October, 1969

Relaxation and Electromagnetic Response of a Superconductor in a State of Supercurrent Flow

Albert Schmid

Phys. Rev. 186, 420 (1969) - Published 10 October, 1969

Electron Correlation in Narrow Energy Bands. II. One Reversed Spin in an Otherwise Fully Aligned Narrow $S$ Band

Laura M. Roth

Phys. Rev. 186, 428 (1969) - Published 10 October, 1969

Friedel Density Oscillations about a Coulombic Impurity in a High Magnetic Field

Norman J. Horing

Phys. Rev. 186, 434 (1969) - Published 10 October, 1969

Angular Momentum and Transition-Metal Superconductivity

J. J. Hopfield

Phys. Rev. 186, 443 (1969) - Published 10 October, 1969

Selection Rule for Tunneling from Superconductors

J. E. Dowman, M. L. A. MacVicar, and J. R. Waldram

Phys. Rev. 186, 452 (1969) - Published 10 October, 1969

Possible Pairing without Superconductivity at Low Carrier Concentrations in Bulk and Thin-Film Superconducting Semiconductors

D. M. Eagles

Phys. Rev. 186, 456 (1969) - Published 10 October, 1969

Theory of Many-Body Effects in Tunneling

Joel A. Appelbaum and W. F. Brinkman

Phys. Rev. 186, 464 (1969) - Published 10 October, 1969

Spin Correlations in the Electron Liquid

R. Lobo, K. S. Singwi, and M. P. Tosi

Phys. Rev. 186, 470 (1969) - Published 10 October, 1969

Structural Phase Transitions in PrAl $O_{3}$

E. Cohen, L. A. Risberg, W. A. Nordland, R. D. Burbank, R. C. Sherwood, and L. G. Van Uitert

Phys. Rev. 186, 476 (1969) - Published 10 October, 1969

Polarized-Neutron-Diffraction Study of Magnetic Moments in Yttrium-Cobalt Alloys

E. Krén, J. Schweizer, and F. Tasset

Phys. Rev. 186, 479 (1969) - Published 10 October, 1969

Electron Correlation in Ferromagnetism

R. Kishore and S. K. Joshi

Phys. Rev. 186, 484 (1969) - Published 10 October, 1969

Ultrasonic Propagation in RbMn $F_{3}$ . II. Magnetoelastic Properties

R. L. Melcher and D. I. Bolef

Phys. Rev. 186, 491 (1969) - Published 10 October, 1969

Lorenz Number for Metals with Magnetic Impurities

Sang Boo Nam and Martin S. Fullenbaum

Phys. Rev. 186, 506 (1969) - Published 10 October, 1969

High-Field Magnetization of Thulium Single Crystals

D. B. Richards and S. Legvold

Phys. Rev. 186, 508 (1969) - Published 10 October, 1969

Specific Heat of Three Magnetic Linear-Chain Antiferromagnets

Douglas H. Lowndes, Jr., Leonard Finegold, R. N. Rogers, and Bruno Morosin

Phys. Rev. 186, 515 (1969) - Published 10 October, 1969

Magnetoelastic Spin Hamiltonians: Applications to Garnets

Richard Alben and Earl Callen

Phys. Rev. 186, 522 (1969) - Published 10 October, 1969

Energy Transport in Magnetic Chains

D. L. Huber, J. S. Semura, and C. G. Windsor

Phys. Rev. 186, 534 (1969) - Published 10 October, 1969

Effect of Surface Pinning Fields on the Properties of the Heisenberg Ferromagnet

Léonard Dobrzynski and D. L. Mills

Phys. Rev. 186, 538 (1969) - Published 10 October, 1969

Properties of the Renormalized Random-Phase Approximation for Dilute Magnetic Alloys

D. R. Hamann

Phys. Rev. 186, 549 (1969) - Published 10 October, 1969

Magnetic Neutron Scattering in Dysprosium Aluminum Garnet. I. Long-Range Order

J. C. Norvell, W. P. Wolf, L. M. Corliss, J. M. Hastings, and R. Nathans

Phys. Rev. 186, 557 (1969) - Published 10 October, 1969

Magnetic Neutron Scattering in Dysprosium Aluminum Garnet. II. Short-Range Order and Critical Scattering

J. C. Norvell, W. P. Wolf, L. M. Corliss, J. M. Hastings, and R. Nathans

Phys. Rev. 186, 567 (1969) - Published 10 October, 1969

Effect of Pressure on the Néel Temperature of Magnetite

G. A. Samara and A. A. Giardini

Phys. Rev. 186, 577 (1969) - Published 10 October, 1969

Critical Correlations of Certain Lattice Systems with Long-Range Forces

G. Stell and W. K. Theumann

Phys. Rev. 186, 581 (1969) - Published 10 October, 1969

COMMENTS

Plasmon Excitation by Electron Tunneling

C. B. Duke

Phys. Rev. 186, 588 (1969) - Published 10 October, 1969

Surface-Plasmon Excitation by Tunneling Electrons in GaAs-Pb Tunnel Junctions

D. C. Tsui and A. S. Barker, Jr.

Phys. Rev. 186, 590 (1969) - Published 10 October, 1969

Fowler's Hypothesis and the Determination of Photoemission Thresholds

F. Wooten and R. N. Stuart

Phys. Rev. 186, 592 (1969) - Published 10 October, 1969

Exact Configurational Entropy of Copper Formate Tetrahydrate Model

J. F. Nagle

Phys. Rev. 186, 594 (1969) - Published 10 October, 1969