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Physical Review Letters

Volume 42, Issue 9

26 February 1979

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Editorial

Referees and Editors

Robert K. Adair, George L. Trigg, and Gene L. Wells

Phys. Rev. Lett. 42, 545 (1979) - Published 26 February, 1979

LETTERS

General Physics

Proof of the Positive-Action Conjecture in Quantum Relativity

Richard M. Schoen and Shing-Tung Yau

Phys. Rev. Lett. 42, 547 (1979) - Published 26 February, 1979

Improved Laser Test of the Isotropy of Space

A. Brillet and J. L. Hall

Phys. Rev. Lett. 42, 549 (1979) - Published 26 February, 1979

Elementary Particles and Fields

Measurement of Shadowing in Photon-Nucleus Total Cross Sections from 20 to 185 GeV

D. O. Caldwell, J. P. Cumalat, A. M. Eisner, A. Lu, R. J. Morrison, F. V. Murphy, S. J. Yellin, P. J. Davis, M. G. Donnelly, R. M. Egloff, G. J. Luste, J. F. Martin, J. D. Prentice, and T. Nash

Phys. Rev. Lett. 42, 553 (1979) - Published 26 February, 1979

Upper Limit for the Decay $μ^{+} \to e^{+} γ$

J. D. Bowman, M. D. Cooper, M. Hamm, C. M. Hoffman, R. E. Mischke, D. E. Nagle, J. S. Sarracino, P. A. Thompson, H. L. Anderson, W. W. Kinnison, H. S. Matis, S. C. Wright, R. L. Carrington, R. A. Eichler, R. Hofstadter, E. B. Hughes, and T. McPharlin

Phys. Rev. Lett. 42, 556 (1979) - Published 26 February, 1979

Nuclei

Incomplete Momentum Transfer in Peripheral Heavy-Ion Collisions at 20 MeV/Nucleon

P. Dyer, T. C. Awes, C. K. Gelbke, B. B. Back, A. Mignerey, K. L. Wolf, H. Breuer, V. E. Viola, Jr., and W. G. Meyer

Phys. Rev. Lett. 42, 560 (1979) - Published 26 February, 1979

Giant $E 1$ Mode and Its Energy Broadening from the Charge Distributions in Heavy-Ion Reactions

L. G. Moretto, J. Sventek, and G. Mantzouranis

Phys. Rev. Lett. 42, 563 (1979) - Published 26 February, 1979

Origin of Gross Structure in ${}^{12}C$ + ${}^{12}C$ and ${}^{16}O$ + ${}^{16}O$ Inelastic Scattering

R. L. Phillips, K. A. Erb, D. A. Bromley, and J. Weneser

Phys. Rev. Lett. 42, 566 (1979) - Published 26 February, 1979

Atoms and Molecules

Observation of Mixed-Parity Electric-Dipole Oscillations in Charge Transfer to the $n = 2$ Hydrogen Levels by Fast Protons in Gases

I. A. Sellin, L. Liljeby, S. Mannervik, and S. Hultberg

Phys. Rev. Lett. 42, 570 (1979) - Published 26 February, 1979

Fluids, Plasmas, and Electric Discharges

Charged Droplets in Cryogenic ${}^{4}{He}$ Vapor

G. Akinci and J. A. Northby

Phys. Rev. Lett. 42, 573 (1979) - Published 26 February, 1979

Condensed Matter: Structure, Etc.

Monte Carlo Study of an Ordering Alloy on an fcc Lattice

Mohan K. Phani, Joel L. Lebowitz, M. H. Kalos, and C. C. Tsai

Phys. Rev. Lett. 42, 577 (1979) - Published 26 February, 1979

Superfluid Two-Phase Sound

Seth Putterman, David Heckerman, Ralph Rosenbaum, and Gary A. Williams

Phys. Rev. Lett. 42, 580 (1979) - Published 26 February, 1979

Calculation of Thermal Expansion, Compressiblity, an Melting in Alkali Halides: NaCl and KCl

L. L. Boyer

Phys. Rev. Lett. 42, 584 (1979) - Published 26 February, 1979

Absolute Composition Depth Profile of a NiCu Alloy in a Surface Segregation Study

Yee S. Ng, T. T. Tsong, and S. B. McLane, Jr.

Phys. Rev. Lett. 42, 588 (1979) - Published 26 February, 1979

Condensed Matter: Electronic Properties, Etc.

Importance of Polarization of Bound Projectile $s$ Electrons for Transient Magnetic Fields

K. Dybdal, J. L. Eberhardt, and N. Rud

Phys. Rev. Lett. 42, 592 (1979) - Published 26 February, 1979

Observation of Sixfold Valley Degeneracy in Electron Inversion Layers on Si(111)

D. C. Tsui and G. Kaminsky

Phys. Rev. Lett. 42, 595 (1979) - Published 26 February, 1979

Near Cancellation of Electron-Phonon Corrections in Thermoelectric Effects in Alloys

A. Vilenkin and P. L. Taylor

Phys. Rev. Lett. 42, 597 (1979) - Published 26 February, 1979

Definite Evidence for Population Inversion of Hot Electrons in Silver Halides

Susumu Komiyama, Taizo Masumi, and Koji Kajita

Phys. Rev. Lett. 42, 600 (1979) - Published 26 February, 1979

Zero-Field NMR in $Cu Mn$ : New Viewpoint on Remanence in Spin-Glasses

H. Alloul

Phys. Rev. Lett. 42, 603 (1979) - Published 26 February, 1979

Specific Heat near the Critical Concentration for the Dilute Simple-Cubic Magnet ${Co}_{p} {Zn}_{1 - p} {(C_{5} H_{5} NO)}_{6} {(Cl O_{4})}_{2}$

H. A. Algra, L. J. de Jongh, and J. Reedijk

Phys. Rev. Lett. 42, 606 (1979) - Published 26 February, 1979

Cross-Disciplinary Physics

Production of 0.5-TW Proton Pulses with a Spherical Focusing, Magnetically Insulated Diode

D. J. Johnson, G. W. Kuswa, A. V. Farnsworth, Jr., J. P. Quintenz, R. J. Leeper, E. J. T. Burns, and S. Humphries, Jr.

Phys. Rev. Lett. 42, 610 (1979) - Published 26 February, 1979

ERRATA

Raman Scattering Measurements of the $E_{g}$ Optical Phonon in $V_{3}$ Si.

H. Wipf, Miles V. Klein, B. S. Chandrasekhar, T. H. Geballe, and J. H. Wernick

Phys. Rev. Lett. 42, 614 (1979) - Published 26 February, 1979

Absence of Substrate Nucleation for bcc Solid ${}^{3}{He}$ on Grafoil.

J. Landau and Y. Eckstein

Phys. Rev. Lett. 42, 614 (1979) - Published 26 February, 1979

Parity of Bound $J = 1$ Levels in ${}^{208}{Pb}$ .

A. M. Nathan, R. Starr, R. M. Laszewski, and P. Axel

Phys. Rev. Lett. 42, 614 (1979) - Published 26 February, 1979

Light Scattering from Nonequilibrium Stationary States: The Implication of Broken Time-Reversal Symmetry.

Itamar Procaccia, David Ronis, and Irwin Oppenheim

Phys. Rev. Lett. 42, 614 (1979) - Published 26 February, 1979