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Physical Review Letters

Volume 48, Issue 6

8 February 1982

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LETTERS

General Physics

Proof That the Bondi Mass is Positive

Richard Schoen and Shing Tung Yau

Phys. Rev. Lett. 48, 369 (1982) - Published 8 February, 1982

Gravitational Energy Cannot Become Negative

Gary T. Horowitz and Malcolm J. Perry

Phys. Rev. Lett. 48, 371 (1982) - Published 8 February, 1982

Elementary Particles and Fields

Elastic-Scattering Measurement of the Negative-Pion Radius

E. B. Dally, J. M. Hauptman, J. Kubic, D. H. Stork, A. B. Watson, Z. Guzik, T. S. Nigmanov, V. D. Riabtsoy, E. N. Tsyganov, A. S. Vodopianov, A. Beretvas, A. Grigorian, J. C. Tompkins, T. E. Toohig, A. A. Wehmann, J. A. Poirier, C. A. Rey, J. T. Volk, P. D. Rapp, and P. F. Shepard

Phys. Rev. Lett. 48, 375 (1982) - Published 8 February, 1982

Dynamical Symmetry Breaking and the Sigma-Meson Mass in Quantum Chromodynamics

R. Delbourgo and M. D. Scadron

Phys. Rev. Lett. 48, 379 (1982) - Published 8 February, 1982

Nuclei

$g$ Factors of High-Spin Yrast States in ${}^{232}{Th}$ and ${}^{238}U$

O. Häusser, H. Gräf, L. Grodzins, E. Jaeschke, V. Metag, D. Habs, D. Pelte, H. Emling, E. Grosse, R. Kulessa, D. Schwalm, R. S. Simon, and J. Keinonen

Phys. Rev. Lett. 48, 383 (1982) - Published 8 February, 1982

Dominance of Monopole and Quadrupole Pairs in the Nilsson Model

Takaharu Otsuka, Akito Arima, and Naotaka Yoshinaga

Phys. Rev. Lett. 48, 387 (1982) - Published 8 February, 1982

What Governs the Accuracy of Distorted-Wave Approximations

Daniel S. MacMillan and Edward F. Redish

Phys. Rev. Lett. 48, 391 (1982) - Published 8 February, 1982

Atoms and Molecules

Optical Stark Splitting of Rotational Raman Transitions

R. L. Farrow and L. A. Rahn

Phys. Rev. Lett. 48, 395 (1982) - Published 8 February, 1982

Measurement of the Lamb Shift in Hydrogenic ${Cl}^{16 +}$

O. R. Wood, II, C. K. N. Patel, D. E. Murnick, E. T. Nelson, M. Leventhal, H. W. Kugel, and Y. Niv

Phys. Rev. Lett. 48, 398 (1982) - Published 8 February, 1982

Fluids, Plasmas, and Electric Discharges

Evidence for Failure of Millikan's Law of Particle Fall in Gases

Yong W. Kim and Paul D. Fedele

Phys. Rev. Lett. 48, 403 (1982) - Published 8 February, 1982

Condensed Matter: Structure, Etc.

Ab Initio Force Constants of GaAs: A New Approach to Calculation of Phonons and Dielectric Properties

K. Kunc and Richard M. Martin

Phys. Rev. Lett. 48, 406 (1982) - Published 8 February, 1982

Computer Simulation of the Plastic-to-Crystalline Phase Transition in S $F_{6}$

G. S. Pawley and G. W. Thomas

Phys. Rev. Lett. 48, 410 (1982) - Published 8 February, 1982

Calculation of the $Γ - Δ$ Electron-Phonon and Hole-Phonon Scattering Matrix Elements in Silicon

Orest J. Glembocki and Fred H. Pollak

Phys. Rev. Lett. 48, 413 (1982) - Published 8 February, 1982

Equilibrium Fluctuations in Fluid Layers: Effects of Transport Across Fluid-Solid Interfaces

Dina Gutkowicz-Krusin and Itamar Procaccia

Phys. Rev. Lett. 48, 417 (1982) - Published 8 February, 1982

Condensed Matter: Electronic Properties, Etc.

Observation of a Reversible Field-Induced Doping Effect in Hydrogenated Amorphous Silicon

D. V. Lang, J. D. Cohen, and J. P. Harbison

Phys. Rev. Lett. 48, 421 (1982) - Published 8 February, 1982

Transient-Capacitance Measurement of the Grain Boundary Levels in Semiconductors

A. Broniatowski and J. -C. Bourgoin

Phys. Rev. Lett. 48, 424 (1982) - Published 8 February, 1982

Velocity Distributions of Sputtered Excited Atoms

Ming L. Yu, D. Grischkowsky, and A. C. Balant

Phys. Rev. Lett. 48, 427 (1982) - Published 8 February, 1982

Diffusive Solitons in Impure Sine-Gordon Chains: Experimental Evidence in ${(C D_{3})}_{4} N {Mn}_{(1 - c)} {Cu}_{c} {Cl}_{3}$

J. P. Boucher, H. Benner, F. Devreux, L. P. Regnault, J. Rossat-Mignod, C. Dupas, J. P. Renard, J. Bouillot, and W. G. Stirling

Phys. Rev. Lett. 48, 431 (1982) - Published 8 February, 1982

Self-Consistent Nonequilibrium Description of Phase-Slip States in Superconducting Filaments

A. Baratoff

Phys. Rev. Lett. 48, 434 (1982) - Published 8 February, 1982

Random-Field Effects in Two- and Three-Dimensional Ising Antiferromagnets

H. Yoshizawa, R. A. Cowley, G. Shirane, R. J. Birgeneau, H. J. Guggenheim, and H. Ikeda

Phys. Rev. Lett. 48, 438 (1982) - Published 8 February, 1982

Field-Induced Commensurate Phase in Thiourea

J. P. Jamet, P. Lederer, and A. H. Moudden

Phys. Rev. Lett. 48, 442 (1982) - Published 8 February, 1982

ERRATA

Measurement of a Quadrupole Transition Moment by Interference of Quadrupole and dc-Field-Induced Sum-Frequency Generation

Donald S. Bethune, Robert W. Smith, and Y. R. Shen

Phys. Rev. Lett. 48, 445 (1982) - Published 8 February, 1982

Droplet Theory of Low-Dimensional Ising Models

A. D. Bruce and D. J. Wallace

Phys. Rev. Lett. 48, 446 (1982) - Published 8 February, 1982

Long-Range Surface-Plasma Waves on Very Thin Metal Films

Dror Sarid

Phys. Rev. Lett. 48, 446 (1982) - Published 8 February, 1982