Volume 63, Issue 13

D. A. Whitehouse, E. C. Booth, W. J. Fickinger, K. P. Gall, M. D. Hasinoff, N. P. Hessey, D. Horváth, J. Lowe, E. K. McIntyre, D. F. Measday, J. P. Miller, A. J. Noble, B. L. Roberts, D. K. Robinson, M. Sakitt, and M. Salomon

Phys. Rev. Lett. 63, 1352 (1989) - Published 25 September, 1989

Nuclear Physics

Electroexcitation of rotational vibrations in ${}^{164}{Dy}$

F. G. Scholtz, R. Nojarov, and Amand Faessler

Phys. Rev. Lett. 63, 1356 (1989) - Published 25 September, 1989

Atomic, Molecular, and Optical Physics

Cooling and slowing of trapped antiprotons below 100 meV

G. Gabrielse, X. Fei, L. A. Orozco, R. L. Tjoelker, J. Haas, H. Kalinowsky, T. A. Trainor, and W. Kells

Phys. Rev. Lett. 63, 1360 (1989) - Published 25 September, 1989

Resonance contributions to the photoionization spectrum of atomic hydrogen in an electric field

Gabriel Alvarez and Harris J. Silverstone

Phys. Rev. Lett. 63, 1364 (1989) - Published 25 September, 1989

Photoionization of mass-selected $K_{n}^{+}$ ions: A test for the ionization scaling law

C. Bréchignac, Ph. Cahuzac, F. Carlier, and J. Leygnier

Phys. Rev. Lett. 63, 1368 (1989) - Published 25 September, 1989

Origin of periodic, chaotic, and bistable emission from Raman lasers

R. G. Harrison, Weiping Lu, and P. K. Gupta

Phys. Rev. Lett. 63, 1372 (1989) - Published 25 September, 1989

Resonance fluorescence spectrum of an atom strongly coupled to a cavity

Craig M. Savage

Phys. Rev. Lett. 63, 1376 (1989) - Published 25 September, 1989

Plasma and Beam Physics

Current drive via magnetohydrodynamic helicity waves

R. R. Mett and J. A. Tataronis

Phys. Rev. Lett. 63, 1380 (1989) - Published 25 September, 1989

Current drive by plasma waves and helicity conservation

J. B. Taylor

Phys. Rev. Lett. 63, 1384 (1989) - Published 25 September, 1989

Cyclotron emission asymmetry from Kirchhoff’s law in a mode-conversion layer

D. G. Swanson and Suwon Cho

Phys. Rev. Lett. 63, 1386 (1989) - Published 25 September, 1989

Condensed Matter: Structure, Etc.

Shapes of laser-produced CsH particles

T. Tanaka, T. Mitsui, K. Sugiyama, M. Kitano, and T. Yabuzaki

Phys. Rev. Lett. 63, 1390 (1989) - Published 25 September, 1989

Isotope effects in dense solid hydrogen: Phase transition in deuterium at 190±20 GPa

R. J. Hemley and H. K. Mao

Phys. Rev. Lett. 63, 1393 (1989) - Published 25 September, 1989

Theory of hydrogen pairing in yttrium

Feng Liu, M. Challa, S. N. Khanna, and P. Jena

Phys. Rev. Lett. 63, 1396 (1989) - Published 25 September, 1989

Anomalous local hopping of Sn impurities in lead

H. Shechter, E. A. Stern, Y. Yacoby, R. Brener, and Zhe Zhang

Phys. Rev. Lett. 63, 1400 (1989) - Published 25 September, 1989

Origins of stress on elemental and chemisorbed semiconductor surfaces

Robert D. Meade and David Vanderbilt

Phys. Rev. Lett. 63, 1404 (1989) - Published 25 September, 1989

Determination of the structure of hydrogen on a W(211) surface

O. Grizzi, M. Shi, H. Bu, J. W. Rabalais, R. R. Rye, and P. Nordlander

Phys. Rev. Lett. 63, 1408 (1989) - Published 25 September, 1989

Electronic states of metal atoms on the GaAs(110) surface studied by scanning tunneling microscopy

R. M. Feenstra

Phys. Rev. Lett. 63, 1412 (1989) - Published 25 September, 1989

Metallicity and gap states in tunneling to Fe clusters in GaAs(110)

P. N. First, Joseph A. Stroscio, R. A. Dragoset, D. T. Pierce, and R. J. Celotta

Phys. Rev. Lett. 63, 1416 (1989) - Published 25 September, 1989

Condensed Matter: Electronic Properties, Etc.

Internal photoemission of holes and the mobility gap of hydrogenated amorphous silicon

C. R. Wronski, S. Lee, M. Hicks, and Satyendra Kumar

Phys. Rev. Lett. 63, 1420 (1989) - Published 25 September, 1989

High-field magnetization of a quasi-one-dimensional S=1 antiferromagnet Ni( $C_{2}$ $H_{8}$ $N_{2}$ $)_{2}$ ${NO}_{2}$ ( ${ClO}_{4}$ : Observation of the Haldane gap

Yoshitami Ajiro, Tsuneaki Goto, Hikomitsu Kikuchi, Toshiro Sakakibara, and Toshiya Inami

Phys. Rev. Lett. 63, 1424 (1989) - Published 25 September, 1989

Defects, vortices, and critical current in Josephson-junction arrays

W. Xia and P. L. Leath

Phys. Rev. Lett. 63, 1428 (1989) - Published 25 September, 1989

Cross-Disciplinary Physics

Translational tunneling of protons in benzoic-acid crystals

Andreas Oppenländer, Christophe Rambaud, H. Peter Trommsdorff, and Jean-Claude Vial

Phys. Rev. Lett. 63, 1432 (1989) - Published 25 September, 1989

COMMENTS

Symmetries of internally resonant, parametrically excited surface waves

John Miles

Phys. Rev. Lett. 63, 1436 (1989) - Published 25 September, 1989

Meron and Procaccia reply:

Ehud Meron and Itamar Procaccia

Phys. Rev. Lett. 63, 1437 (1989) - Published 25 September, 1989

Comment on ‘‘Speckle in the diffraction patterns of Hendricks-Teller and icosahedral glass models’’

X. B. Kan and J. L. Robertson

Phys. Rev. Lett. 63, 1438 (1989) - Published 25 September, 1989

Garg and Levine reply:

Anupam Garg and Dov Levine

Phys. Rev. Lett. 63, 1439 (1989) - Published 25 September, 1989

Comment on ‘‘Critical frontier of the antiferromagnetic Ising model in a magnetic field: The honeycomb lattice’’

Leh-Hun Gwa

Phys. Rev. Lett. 63, 1440 (1989) - Published 25 September, 1989

Comment on ‘‘Pseudoquasicrystals: Quasicrystal-like crystals with thirteen to eighteen strong electron scatterers per unit cell’’

K. H. Kuo

Phys. Rev. Lett. 63, 1441 (1989) - Published 25 September, 1989

ERRATA

Ordering and Criticality in Spin-1 Chains

Rajiv R. P. Singh and Martin P. Gelfand

Phys. Rev. Lett. 63, 1442 (1989) - Published 25 September, 1989

Comment on "Ordering and Criticality in Spin-1 Chains."

Ian Affleck

Phys. Rev. Lett. 63, 1442 (1989) - Published 25 September, 1989

Photon Pairing and the Strong-Coupling Phase of Massive Quantum Electrodynamics

R. Fukuda

Phys. Rev. Lett. 63, 1442 (1989) - Published 25 September, 1989

Anyon Superconductivity and the Fractional Quantum Hall Effect

Dung-Hai Lee and Matthew P. A. Fisher

Phys. Rev. Lett. 63, 1442 (1989) - Published 25 September, 1989