Volume 54, Issue 16

T. Cowan, H. Backe, M. Begemann, K. Bethge, H. Bokemeyer, H. Folger, J. S. Greenberg, H. Grein, A. Gruppe, Y. Kido, M. Klüver, D. Schwalm, J. Schweppe, K. E. Stiebing, N. Trautmann, and P. Vincent

Phys. Rev. Lett. 54, 1761 (1985) - Published 22 April, 1985

SU(2) $β$ Function with and without Dynamical Fermions

U. Heller and F. Karsch

Phys. Rev. Lett. 54, 1765 (1985) - Published 22 April, 1985

$K^{0}$ , $({\bar{K}}^{0}) \to 2 γ$ Decays: Phenomenology and $CP$ Nonconservation

Ling-Lie Chau and Hai-Yang Cheng

Phys. Rev. Lett. 54, 1768 (1985) - Published 22 April, 1985

Microcanonical Determination of Effective-Spin Models for Finite-Temperature QCD

A. Gocksch and M. Ogilvie

Phys. Rev. Lett. 54, 1772 (1985) - Published 22 April, 1985

Observation of $τ$ -Lepton Decay to Five Charged Particles

I. Beltrami et al.

Phys. Rev. Lett. 54, 1775 (1985) - Published 22 April, 1985

Nuclei

Nucleus-Nucleus Potential inside the Strong-Absorption Radius from ${}^{16}O$ + ${}^{12}C$ Elastic Scattering at 94 MeV/u

P. Roussel, N. Alamanos, F. Auger, J. Barrette, B. Berthier, B. Fernandez, L. Papineau, H. Doubre, and W. Mittig

Phys. Rev. Lett. 54, 1779 (1985) - Published 22 April, 1985

$α$ Decay of Neutron-Deficient Odd Bi Nuclei: Shell-Model Intruder States in Tl and Bi Isotopes

E. Coenen, K. Deneffe, M. Huyse, P. Van Duppen, and J. L. Wood

Phys. Rev. Lett. 54, 1783 (1985) - Published 22 April, 1985

Atoms and Molecules

Experimental Determination of the Ground-State Inversion Splitting in $H_{3}$ $O^{+}$

Di-Jia Liu and Takeshi Oka

Phys. Rev. Lett. 54, 1787 (1985) - Published 22 April, 1985

Polarization Correlation of the Two Photons Emitted by Metastable Atomic Deuterium: A Test of Bell's Inequality

W. Perrie, A. J. Duncan, H. J. Beyer, and H. Kleinpoppen

Phys. Rev. Lett. 54, 1790 (1985) - Published 22 April, 1985

${}^{3}P_{1}$ -Orientation Velocity-Changing Collision Kernels Studied by Isolated Multipole Echoes

A. P. Ghosh, C. D. Nabors, M. A. Attili, and J. E. Thomas

Phys. Rev. Lett. 54, 1794 (1985) - Published 22 April, 1985

Classical Phenomenology and Applications

Observation of Bistable Reflectivity of a Phase-Conjugated Signal through Intracavity Nearly Degenerate Four-Wave Mixing

Hisao Nakajima and Robert Frey

Phys. Rev. Lett. 54, 1798 (1985) - Published 22 April, 1985

Squeezing Pattern in Resonance Fluorescence from a Regular $N$ -Atom System

W. Vogel and D. -G. Welsch

Phys. Rev. Lett. 54, 1802 (1985) - Published 22 April, 1985

Frustrated Optical Instability: Self-Induced Periodic and Chaotic Spatial Distribution of Polarization in Nonlinear Optical Media

Junji Yumoto and Kenju Otsuka

Phys. Rev. Lett. 54, 1806 (1985) - Published 22 April, 1985

Parametric Self-Enhancement of the Spontaneous Decay of Sound in Superfluid Helium

J. S. Foster and S. Putterman

Phys. Rev. Lett. 54, 1810 (1985) - Published 22 April, 1985

Condensed Matter: Structure, Etc.

Nonuniversal $ν$ from a van der Waals Theory of the Wetting Transition

T. Aukrust and E. H. Hauge

Phys. Rev. Lett. 54, 1814 (1985) - Published 22 April, 1985

New Type of Cholesteric Liquid Crystal

Harald Pleiner and Helmut R. Brand

Phys. Rev. Lett. 54, 1817 (1985) - Published 22 April, 1985

Specific Heat of Two-Dimensional Electrons in GaAs-GaAlAs Multilayers

E. Gornik, R. Lassnig, G. Strasser, H. L. Störmer, A. C. Gossard, and W. Wiegmann

Phys. Rev. Lett. 54, 1820 (1985) - Published 22 April, 1985

Effect of Criticality on Wetting Layers

M. P. Nightingale and J. O. Indekeu

Phys. Rev. Lett. 54, 1824 (1985) - Published 22 April, 1985

Theory of Ballistic Aggregation

P. Ramanlal and L. M. Sander

Phys. Rev. Lett. 54, 1828 (1985) - Published 22 April, 1985

Symmetry Criterion for the Lack of a Stable Fixed Point in the Renormalization-Group Recursion Relations

Louis Michel and Jean-Claude Toledano

Phys. Rev. Lett. 54, 1832 (1985) - Published 22 April, 1985

Condensed Matter: Electronic Properties, Etc.

Donor States in Hydrogenated Amorphous Silicon and Germanium

M. Stutzmann and R. A. Street

Phys. Rev. Lett. 54, 1836 (1985) - Published 22 April, 1985

Specular Boundary Scattering and Electrical Transport in Single-Crystal Thin Films of Co ${Si}_{2}$

J. C. Hensel, R. T. Tung, J. M. Poate, and F. C. Unterwald

Phys. Rev. Lett. 54, 1840 (1985) - Published 22 April, 1985

Method for Direct Determination of the Effective Correlation Energy of Defects in Semiconductors: Optical Modulation Spectroscopy of Dangling Bonds

Z. Vardeny and J. Tauc

Phys. Rev. Lett. 54, 1844 (1985) - Published 22 April, 1985

Evidence for Resonant Tunneling of Electrons via Sodium Ions in Silicon Dioxide

R. H. Koch and A. Hartstein

Phys. Rev. Lett. 54, 1848 (1985) - Published 22 April, 1985

Theory of Magnetic and Structural Ordering in Iron

C. S. Wang, B. M. Klein, and H. Krakauer

Phys. Rev. Lett. 54, 1852 (1985) - Published 22 April, 1985

New Look at the Mechanism for Alkali-Metal Promotion

W. Eberhardt, F. M. Hoffmann, R. dePaola, D. Heskett, I. Strathy, E. W. Plummer, and H. R. Moser

Phys. Rev. Lett. 54, 1856 (1985) - Published 22 April, 1985

Electron Localization in Alkali-Halide Clusters

Uzi Landman, Dafna Scharf, and Joshua Jortner

Phys. Rev. Lett. 54, 1860 (1985) - Published 22 April, 1985

Cross-Disciplinary Physics

Density of Low-Energy Vibrational States in a Protein Solution

A. S. Brill, F. G. Fiamingo, D. A. Hampton, P. D. Levin, and R. Thorkildsen

Phys. Rev. Lett. 54, 1864 (1985) - Published 22 April, 1985

Geophysics, Astronomy, and Astrophysics

Evolution of Cosmic Strings

A. Albrecht and N. Turok

Phys. Rev. Lett. 54, 1868 (1985) - Published 22 April, 1985

Simulations of High—Mach-Number Collisionless Perpendicular Shocks in Astrophysical Plasmas

Kevin B. Quest

Phys. Rev. Lett. 54, 1872 (1985) - Published 22 April, 1985

Evidence for a High-Energy Cosmic-Ray Spectrum Cutoff

R. M. Baltrusaitis, R. Cady, G. L. Cassiday, R. Cooper, J. W. Elbert, P. R. Gerhardy, S. Ko, E. C. Loh, Y. Mizumoto, M. Salamon, P. Sokolsky, and D. Steck

Phys. Rev. Lett. 54, 1875 (1985) - Published 22 April, 1985

ERRATA

Evidence for Collisional Damping in High-Energy Raman-Scattering Experiments at 0.26 μm

R. E. Turner, Kent Estabrook, R. L. Kauffman, D. R. Bach, R. P. Drake, D. W. Phillion, B. F. Lasinski, E. M. Campbell, W. L. Kruer, and E. A. Williams

Phys. Rev. Lett. 54, 1878 (1985) - Published 22 April, 1985