Volume 57, Issue 9

1 September 1986

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LETTERS

General Physics

Minimax Principle for the Dirac Equation

James D. Talman

Phys. Rev. Lett. 57, 1091 (1986) - Published 1 September, 1986

Quantized Currents and Topological Invariants for Electrons in Incommensurate Potentials

H. Kunz

Phys. Rev. Lett. 57, 1095 (1986) - Published 1 September, 1986

Self-Similarity of Fluctuations in Random Multiplicative Processes

L. Pietronero and A. P. Siebesma

Phys. Rev. Lett. 57, 1098 (1986) - Published 1 September, 1986

Elementary Particles and Fields

Topological Terms Induced by Finite Temperature and Density Fluctuations

Antti J. Niemi

Phys. Rev. Lett. 57, 1102 (1986) - Published 1 September, 1986

$B \to K l^{+} l^{-}$ and Other Rare $B$ -Meson Decays

N. G. Deshpande, G. Eilam, A. Soni, and G. L. Kane

Phys. Rev. Lett. 57, 1106 (1986) - Published 1 September, 1986

$WW$ Production from $pp$ Collisions

Duane A. Dicus and Roberto Vega

Phys. Rev. Lett. 57, 1110 (1986) - Published 1 September, 1986

Nuclei

Precise Test for the Unitarized Pion Photoproduction Impulse Amplitude in Exclusive Nuclear Reactions

R. Wittman and Nimai C. Mukhopadhyay

Phys. Rev. Lett. 57, 1113 (1986) - Published 1 September, 1986

Comprehensive Calculations of the ( $π^{+}, K^{+}$ ) Reaction on ${}^{12}C$

Dean Halderson, Yizhang Mo, and Pingzhi Ning

Phys. Rev. Lett. 57, 1117 (1986) - Published 1 September, 1986

Neutron-Star Masses as a Constraint on the Nuclear Compression Modulus

N. K. Glendenning

Phys. Rev. Lett. 57, 1120 (1986) - Published 1 September, 1986

Definition of the Shape Parameter $γ$ in the Interacting-Boson Model

J. P. Elliott, J. A. Evans, and P. Van Isacker

Phys. Rev. Lett. 57, 1124 (1986) - Published 1 September, 1986

Atoms and Molecules

Computation of Second-Order Many-Body Corrections in Relativistic Atomic Systems

W. R. Johnson and J. Sapirstein

Phys. Rev. Lett. 57, 1126 (1986) - Published 1 September, 1986

Coincidence Study of Doubly Differential Cross Sections: Projectile Ionization in ${He}^{+}$ -He Collisions

R. D. DuBois and Steven T. Manson

Phys. Rev. Lett. 57, 1130 (1986) - Published 1 September, 1986

Fluids, Plasmas, and Electric Discharges

Structure of a One-Component Plasma in an External Field: A Molecular-Dynamics Study of Particle Arrangement in a Heavy-Ion Storage Ring

A. Rahman and J. P. Schiffer

Phys. Rev. Lett. 57, 1133 (1986) - Published 1 September, 1986

Suppression of Sawtooth Oscillations by Lower-Hybrid Current Drive in the ASDEX Tokamak

F. X. Söldner et al.

Phys. Rev. Lett. 57, 1137 (1986) - Published 1 September, 1986

Condensed Matter: Structure, Etc.

Quantum Beats from Nuclei Excited by Synchrotron Radiation

E. Gerdau, R. Rüffer, R. Hollatz, and J. P. Hannon

Phys. Rev. Lett. 57, 1141 (1986) - Published 1 September, 1986

Energy Surfaces of Polymeric Sulfur: Structure and Electronic Properties

M. Springborg and R. O. Jones

Phys. Rev. Lett. 57, 1145 (1986) - Published 1 September, 1986

Coulomb Energy in Pseudobinary Alloys

Mark van Schilfgaarde, An-Ban Chen, and A. Sher

Phys. Rev. Lett. 57, 1149 (1986) - Published 1 September, 1986

Evidence for the Ir(100) Surface Reconstruction by Field-ion Microscopy

J. Witt and K. Müller

Phys. Rev. Lett. 57, 1153 (1986) - Published 1 September, 1986

Synchrotron X-Ray Study of a Fibonacci Superlattice

J. Todd, R. Merlin, Roy Clarke, K. M. Mohanty, and J. D. Axe

Phys. Rev. Lett. 57, 1157 (1986) - Published 1 September, 1986

Nuclear Ferromagnetism of Two-Dimensional ${}^{3}{He}$

H. Franco, R. E. Rapp, and H. Godfrin

Phys. Rev. Lett. 57, 1161 (1986) - Published 1 September, 1986

Condensed Matter: Electronic Properties, Etc.

Spin-Freezing Process in a Spin-Glass: ${Cd}_{0.6}$ ${Mn}_{0.4}$ Te

M. Ayadi, J. Ferré, A. Mauger, and R. Triboulet

Phys. Rev. Lett. 57, 1165 (1986) - Published 1 September, 1986

Critical Properties of a Random-Anisotropy System $a - DyNi$ : A New Universality Class in Disordered Systems?

B. Dieny and B. Barbara

Phys. Rev. Lett. 57, 1169 (1986) - Published 1 September, 1986

Phase-Transition Behavior in a Random-Anisotropy System

D. J. Sellmyer and S. Nafis

Phys. Rev. Lett. 57, 1173 (1986) - Published 1 September, 1986

Transition of Local Moments Coupled to Itinerant Electrons in the Quasi One-Dimensional Conductor Copper Phthalocyanine Iodide

M. Y. Ogawa, B. M. Hoffman, S. Lee, M. Yudkowsky, and W. P. Halperin

Phys. Rev. Lett. 57, 1177 (1986) - Published 1 September, 1986

First-Principles Calculation of the Residual Electrical Resistivity of Random Alloys

James C. Swihart, William H. Butler, G. Malcolm Stocks, D. M. Nicholson, and R. C. Ward

Phys. Rev. Lett. 57, 1181 (1986) - Published 1 September, 1986

Cross-Disciplinary Physics

Reaction of Si(100) with N $H_{3}$ : Rate-Limiting Steps and Reactivity Enhancement via Electronic Excitation

F. Bozso and Ph. Avouris

Phys. Rev. Lett. 57, 1185 (1986) - Published 1 September, 1986

COMMENTS

Comment on "Experimental Study of the Elastic Properties of a Percolating System"

Jean Vareille

Phys. Rev. Lett. 57, 1189 (1986) - Published 1 September, 1986

Benguigui Responds:

L. Benguigui

Phys. Rev. Lett. 57, 1190 (1986) - Published 1 September, 1986

Comment on "NMR Study of the Structure and Motion of Charge-Density Waves in Nb ${Se}_{3}$ "

S. N. Coppersmith

Phys. Rev. Lett. 57, 1191 (1986) - Published 1 September, 1986