Volume 60, Issue 21

C. Shipbaugh, J. Wiss, M. Binkley, J. Butler, J. P. Cumalat, P. Coteus, M. DiCorato, M. Diesburg, J. Enagonio, J. Filaseta, P. L. Frabetti, I. Gaines, P. Garbincius, M. Gormley, D. Harding, T. Kroc, R. Ladbury, P. Lebrun, P. F. Manfredi, J. Peoples, A. Sala, and J. Slaughter

Phys. Rev. Lett. 60, 2117 (1988) - Published 23 May, 1988

Nuclear Physics

Nuclear-Target Effects in $\frac{J}{ψ}$ Production in 125-GeV/c Antiproton and $π^{-}$ Interactions

S. Katsanevas et al.

Phys. Rev. Lett. 60, 2121 (1988) - Published 23 May, 1988

Basis for a Characteristic Temperature in Nuclear Fragmentation

William A. Friedman

Phys. Rev. Lett. 60, 2125 (1988) - Published 23 May, 1988

Search for Motional Narrowing Effects in Nuclear $γ$ -Ray Spectra

F. S. Stephens, J. E. Draper, M. A. Deleplanque, R. M. Diamond, and A. O. Macchiavelli

Phys. Rev. Lett. 60, 2129 (1988) - Published 23 May, 1988

Nuclear Orientation of Radon Isotopes by Spin-Exchange Optical Pumping

M. Kitano, F. P. Calaprice, M. L. Pitt, J. Clayhold, W. Happer, M. Kadar-Kallen, M. Musolf, G. Ulm, K. Wendt, T. Chupp, J. Bonn, R. Neugart, E. Otten, and H. T. Duong

Phys. Rev. Lett. 60, 2133 (1988) - Published 23 May, 1988

Atomic, Molecular, and Optical Physics

Quantum-State-Selective Mirror Reflection of Atoms by Laser Light

V. I. Balykin, V. S. Letokhov, Yu. B. Ovchinnikov, and A. I. Sidorov

Phys. Rev. Lett. 60, 2137 (1988) - Published 23 May, 1988

Density Functionals for the Energy of Electronic Systems: Explicit Variational Construction

J. Cioslowski

Phys. Rev. Lett. 60, 2141 (1988) - Published 23 May, 1988

Fundamental Phenomenology and Applications

Direct Measurement of Beam-Induced Fields in Accelerating Structures

H. Figueroa, W. Gai, R. Konecny, J. Norem, A. Ruggiero, P. Schoessow, and J. Simpson

Phys. Rev. Lett. 60, 2144 (1988) - Published 23 May, 1988

Fluids, Plasmas, and Electric Discharges

Stabilization of Sawteeth with Additional Heating in the JET Tokamak

D. J. Campbell et al.

Phys. Rev. Lett. 60, 2148 (1988) - Published 23 May, 1988

Condensed Matter: Structure, Etc.

Characterization of Structural and Dynamical Behavior in Monolayers of Long-Chain Molecules Using Molecular-Dynamics Calculations

James P. Bareman, Gianni Cardini, and Michael L. Klein

Phys. Rev. Lett. 60, 2152 (1988) - Published 23 May, 1988

Amorphization and Conductivity of Silicon and Germanium Induced by Indentation

D. R. Clarke, M. C. Kroll, P. D. Kirchner, R. F. Cook, and B. J. Hockey

Phys. Rev. Lett. 60, 2156 (1988) - Published 23 May, 1988

Speckle in the Diffraction Patterns of Hendricks-Teller and Icosahedral Glass Models

Anupam Garg and Dov Levine

Phys. Rev. Lett. 60, 2160 (1988) - Published 23 May, 1988

Localized, Time-Dependent State in the Convection of a Nematic Liquid Crystal

A. Joets and R. Ribotta

Phys. Rev. Lett. 60, 2164 (1988) - Published 23 May, 1988

Layer Rigidity and Collective Effects in Pillared Lamellar Solids

H. Kim, W. Jin, S. Lee, P. Zhou, T. J. Pinnavaia, S. D. Mahanti, and S. A. Solin

Phys. Rev. Lett. 60, 2168 (1988) - Published 23 May, 1988

Observations of a Very Large Critical Length Scale in SrTi $O_{3}$

R. J. Nelmes, P. E. Hatton, and H. Vass

Phys. Rev. Lett. 60, 2172 (1988) - Published 23 May, 1988

Structure of GaAs(001) $(2 \times 4) - c (2 \times 8)$ Determined by Scanning Tunneling Microscopy

M. D. Pashley, K. W. Haberern, W. Friday, J. M. Woodall, and P. D. Kirchner

Phys. Rev. Lett. 60, 2176 (1988) - Published 23 May, 1988

Microdomain Structure Displaying Apparent Decagonal Symmetry

D. S. Zhou, H. Q. Ye, D. X. Li, and K. H. Kuo

Phys. Rev. Lett. 60, 2180 (1988) - Published 23 May, 1988

Condensed Matter: Electronic Properties, Etc.

Theoretical Evidence for an Optically Inducible Structural Transition of the Isolated As Antisite in GaAs: Identification and Explanation of $EL 2$ ?

Jaroslaw Dabrowski and Matthias Scheffler

Phys. Rev. Lett. 60, 2183 (1988) - Published 23 May, 1988

Metastability of the Isolated Arsenic-Antisite Defect in GaAs

D. J. Chadi and K. J. Chang

Phys. Rev. Lett. 60, 2187 (1988) - Published 23 May, 1988

Possible Origins of High- $T_{c}$ Superconductivity

J. R. Hardy and J. W. Flocken

Phys. Rev. Lett. 60, 2191 (1988) - Published 23 May, 1988

Temperature Dependence of the Resistivity Tensor in Superconducting ${Bi}_{2}$ ${Sr}_{2.2}$ ${Ca}_{0.8}$ ${Cu}_{2}$ $O_{8}$ Crystals

S. Martin, A. T. Fiory, R. M. Fleming, L. F. Schneemeyer, and J. V. Waszczak

Phys. Rev. Lett. 60, 2194 (1988) - Published 23 May, 1988

High Sensitivity of Positrons to Oxygen Vacancies and to Copper-Oxygen Chain Disorder in $Y {Ba}_{2} {Cu}_{3} O_{7 - x}$

E. C. von Stetten, S. Berko, X. S. Li, R. R. Lee, J. Brynestad, D. Singh, H. Krakauer, W. E. Pickett, and R. E. Cohen

Phys. Rev. Lett. 60, 2198 (1988) - Published 23 May, 1988

Giant Flux Creep and Irreversibility in an Y-Ba-Cu-O Crystal: An Alternative to the Superconducting-Glass Model

Y. Yeshurun and A. P. Malozemoff

Phys. Rev. Lett. 60, 2202 (1988) - Published 23 May, 1988

Unusual Transport Effects in Anisotropic Superconductors

B. Arfi, H. Bahlouli, C. J. Pethick, and David Pines

Phys. Rev. Lett. 60, 2206 (1988) - Published 23 May, 1988

Semiclassical Formalism of Optical Absorption and Breathers in Polyacetylene

B. Horovitz, A. R. Bishop, and S. R. Phillpot

Phys. Rev. Lett. 60, 2210 (1988) - Published 23 May, 1988

Singularities and Catastrophes in the Dynamics of One-Dimensional Systems

George Reiter

Phys. Rev. Lett. 60, 2214 (1988) - Published 23 May, 1988

Evidence for Interlayer Band Shifts upon Lithium Intercalation in Graphite from Inelastic X-Ray Scattering

W. Schülke, A. Berthold, A. Kaprolat, and H. -J. Güntherodt

Phys. Rev. Lett. 60, 2217 (1988) - Published 23 May, 1988

Electronic Structure and Optical Properties of Si-Ge Superlattices

K. B. Wong, M. Jaros, I. Morrison, and J. P. Hagon

Phys. Rev. Lett. 60, 2221 (1988) - Published 23 May, 1988

Volume 60, Issue 21

LETTERS

Gravitation and Astrophysics