Volume 53, Issue 8

R. E. Renfordt, D. Schall, R. Bock, R. Brockmann, J. W. Harris, A. Sandoval, R. Stock, H. Ströbele, D. Bangert, W. Rauch, G. Odyniec, H. G. Pugh, and L. S. Schroeder

Phys. Rev. Lett. 53, 763 (1984) - Published 20 August, 1984

Measurement of the Ground-State Gamma-Ray Branching Ratio of the $dt$ Reaction at Low Energies

F. E. Cecil and F. J. Wilkinson, III

Phys. Rev. Lett. 53, 767 (1984) - Published 20 August, 1984

Atoms and Molecules

Electron-Impact Ionization and Dissociative Ionization of the C $D_{3}$ and C $D_{2}$ Free Radicals

Frank A. Baiocchi, Robert C. Wetzel, and Robert S. Freund

Phys. Rev. Lett. 53, 771 (1984) - Published 20 August, 1984

Shape Resonances in the Hydrogen Stark Effect in Fields up to 3 MV/cm

T. Bergeman, C. Harvey, K. B. Butterfield, H. C. Bryant, D. A. Clark, P. A. M. Gram, D. MacArthur, M. Davis, J. B. Donahue, J. Dayton, and W. W. Smith

Phys. Rev. Lett. 53, 775 (1984) - Published 20 August, 1984

Classical Phenomenology and Applications

Undulator and Čerenkov Free-Electron Lasers: A Preliminary Comparison

J. Walsh, B. Johnson, G. Dattoli, and A. Renieri

Phys. Rev. Lett. 53, 779 (1984) - Published 20 August, 1984

Fluids, Plasmas, and Electric Discharges

Thermal-Barrier Production and Identification in a Tandem Mirror

D. P. Grubb et al.

Phys. Rev. Lett. 53, 783 (1984) - Published 20 August, 1984

Condensed Matter: Structure, Etc.

Critical Slowing Down of Biaxiality Fluctuations at the Uniaxial-to-Biaxial Phase Transition in a Lyotropic Disklike Nematic Liquid Crystal

M. B. Lacerda Santos, Y. Galerne, and G. Durand

Phys. Rev. Lett. 53, 787 (1984) - Published 20 August, 1984

Liquid-Crystal Fréedericksz Transition and Surface-Induced Smectic Ordering

Charles Rosenblatt

Phys. Rev. Lett. 53, 791 (1984) - Published 20 August, 1984

Phase Separation in Two-Dimensional ${}^{3}{He}$ - ${}^{4}{He}$ Mixtures

R. A. Guyer

Phys. Rev. Lett. 53, 795 (1984) - Published 20 August, 1984

Critical Behavior of a Dilute Interacting Bose Fluid

Mark Rasolt, Michael J. Stephen, Michael E. Fisher, and Peter B. Weichman

Phys. Rev. Lett. 53, 798 (1984) - Published 20 August, 1984

Integral and Nonintegral Layer Formation in Multilayer Growth of Solid ${}^{4}{He}$ on Grafoil

V. Gridin, J. Adler, Y. Eckstein, and E. Polturak

Phys. Rev. Lett. 53, 802 (1984) - Published 20 August, 1984

Phase Transitions in Lattice-Gas Models Far from Equilibrium

Henk van Beijeren and Lawrence S. Schulman

Phys. Rev. Lett. 53, 806 (1984) - Published 20 August, 1984

Melting Transition of Submonolayer Ar Adsorbed on Graphite

A. D. Migone, Z. R. Li, and M. H. W. Chan

Phys. Rev. Lett. 53, 810 (1984) - Published 20 August, 1984

Neutron-Scattering Study of Ethylene Motions on Graphite Surfaces

B. H. Grier, L. Passell, J. Eckert, H. Patterson, D. Richter, and R. J. Rollefson

Phys. Rev. Lett. 53, 814 (1984) - Published 20 August, 1984

Molecular-Dynamics Calculations for Ethylene Adsorbed on Graphite

Shūichi Nosé and Michael L. Klein

Phys. Rev. Lett. 53, 818 (1984) - Published 20 August, 1984

Large Finite-Size Effect on the Critical Temperature of Adsorbed Layers: Xe on Pd [8(100) × (110)]

J. M. Soler, N. García, R. Miranda, N. Cabrera, and J. J. Sáenz

Phys. Rev. Lett. 53, 822 (1984) - Published 20 August, 1984

Surface Vibrational Excitations on Si(001) 2 × 1

Douglas C. Allan and E. J. Mele

Phys. Rev. Lett. 53, 826 (1984) - Published 20 August, 1984

New Model for the Alloy ${(GaAs)}_{1 - x} {Ge}_{2 x}$

H. Holloway and L. C. Davis

Phys. Rev. Lett. 53, 830 (1984) - Published 20 August, 1984

Dynamics of Long-Wavelength Concentration Fluctuations in Solutions of Linear Polymers

Pierre Wiltzius, Hans R. Haller, David S. Cannell, and Dale W. Schaefer

Phys. Rev. Lett. 53, 834 (1984) - Published 20 August, 1984

Condensed Matter: Electronic Properties, Etc.

Anticorrugating Effect of Hybridization on the Helium Diffraction Potential for Metal Surfaces

James F. Annett and Roger Haydock

Phys. Rev. Lett. 53, 838 (1984) - Published 20 August, 1984

Soliton Formation at the Neutral-to-Ionic Phase Transition in the Mixed-Stack Charge-Transfer Crystal Tetrathiafulvalene - $p$ - Chloranil

T. Mitani, G. Saito, Y. Tokura, and T. Koda

Phys. Rev. Lett. 53, 842 (1984) - Published 20 August, 1984

Electric Field Dependence of Elastic Properties of Ta $S_{3}$

J. W. Brill and W. Roark

Phys. Rev. Lett. 53, 846 (1984) - Published 20 August, 1984

Cross-Disciplinary Physics

$π$ -Bonded $N_{2}$ on Fe(111): The Precursor for Dissociation

M. Grunze, M. Golze, W. Hirschwald, H. -J. Freund, H. Pulm, U. Seip, M. C. Tsai, G. Ertl, and J. Küppers

Phys. Rev. Lett. 53, 850 (1984) - Published 20 August, 1984

ERRATA

Supersymmetry Breaking by the Eleven-Dimensional Scalar Field $φ (x, y)$

Y. S. Myung and Y. D. Kim

Phys. Rev. Lett. 53, 857 (1984) - Published 20 August, 1984

Volume 53, Issue 8

LETTERS

General Physics

Elementary Particles and Fields

Nuclei