Volume 42, Issue 18

C. Bromberg, G. Fox, R. Gomez, J. Pine, J. Rohlf, S. Stampke, K. Yung, S. Erhan, E. Lorenz, M. Medinnis, P. Schlein, V. Ashford, H. Haggerty, R. Juhala, E. Malamud, S. Mori, R. Abrams, R. Delzenero, H. Goldberg, S. Margulies, D. McLeod, J. Solomon, R. Stanek, A. Dzierba, and W. Kropac

Phys. Rev. Lett. 42, 1202 (1979) - Published 30 April, 1979

Atoms and Molecules

Analysis of the $R_{1} (J)$ - and $P_{1} (J)$ -Branch Absorption Spectrum of HD-Rare-Gas Mixtures: An Example of Positive Intercollisional Interference

R. M. Herman

Phys. Rev. Lett. 42, 1206 (1979) - Published 30 April, 1979

Classical Phenomenology and Applications

Radiation Reaction as a Mechanism for Increasing Energy-Momentum of a Particle Interacting with a Laser Field

D. M. Fradkin

Phys. Rev. Lett. 42, 1209 (1979) - Published 30 April, 1979

Critical Behavior of the Penetration Length of a Vortex into a Subcritical Region

R. Ribotta

Phys. Rev. Lett. 42, 1212 (1979) - Published 30 April, 1979

Fluids, Plasmas, and Electric Discharges

Measurement of Fast-Electron Energy Spectra and Preheating in Laser-Irradiated Targets

J. D. Hares, J. D. Kilkenny, M. H. Key, and J. G. Lunney

Phys. Rev. Lett. 42, 1216 (1979) - Published 30 April, 1979

Condensed Matter: Structure, Etc.

Freely Suspended Ferroelectric Liquid-Crystal Films: Absolute Measurements of Polarization, Elastic Constants, and Viscosities

Charles Rosenblatt, Ronald Pindak, Noel A. Clark, and Robert B. Meyer

Phys. Rev. Lett. 42, 1220 (1979) - Published 30 April, 1979

Microscopic Screening and Phonon Dispersion of Silicon: Moment Expansion for the Polarizability

P. E. Van Camp, V. E. Van Doren, and J. T. Devreese

Phys. Rev. Lett. 42, 1224 (1979) - Published 30 April, 1979

Condensed Matter: Electronic Properties, Etc.

Effective Renormalization Behavior of Ag Films Backed by Superconducting Pb

Z. G. Khim and W. J. Tomasch

Phys. Rev. Lett. 42, 1227 (1979) - Published 30 April, 1979

Evidence for Bose-Einstein Condensation of Biexcitons in CuCl

L. L. Chase, N. Peyghambarian, G. Grynberg, and A. Mysyrowicz

Phys. Rev. Lett. 42, 1231 (1979) - Published 30 April, 1979

Electric-Field-Dependent Thermopower of Nb ${Se}_{3}$

R. H. Dee, P. M. Chaikin, and N. P. Ong

Phys. Rev. Lett. 42, 1234 (1979) - Published 30 April, 1979

Negative Shake-Up Energy in Core Ionization

W. Domcke, L. S. Cederbaum, J. Schirmer, and W. von Niessen

Phys. Rev. Lett. 42, 1237 (1979) - Published 30 April, 1979

Giant Hyperfine Anomaly between Bound Negative Muon and Rh Nucleus in Pd Metal

T. Yamazaki, R. S. Hayano, Y. Kuno, J. Imazato, K. Nagamine, S. E. Kohn, and C. Y. Huang

Phys. Rev. Lett. 42, 1241 (1979) - Published 30 April, 1979

ERRATA

Charge Retention in Deep-Inelastic Electroproduction.

R. Erickson, I. Cohen, F. Messing, E. Nordberg, R. Siemann, J. Smith-Kintner, P. Stein, G. Drews, W. Gebert, F. Janata, P. Joos, A. Ladage, H. Nagel, H. Preissner, P. Söding, and A. Sadoff

Phys. Rev. Lett. 42, 1246 (1979) - Published 30 April, 1979

Composition of Primary Cosmic Rays above $10^{13}$ eV from the Study of Time Distributions of Energetic Hadrons Near Air-Shower Cores

J. A. Goodman, R. W. Ellsworth, A. S. Ito, J. R. MacFall, F. Siohan, R. E. Streitmatter, S. C. Tonwar, P. R. Vishwanath, and G. B. Yodh

Phys. Rev. Lett. 42, 1246 (1979) - Published 30 April, 1979

Physical Review Letters

Volume 42, Issue 18

Editorial

Computers and Typography

LETTERS

General Physics

Spectrum and Eigenfunctions for a Hamiltonian with Stochastic Trajectories

Elementary Particles and Fields

Natural Suppression of Strong $P$ - and $T$ -Invariance Violations and Calculable Mixing Angles in SU (2) ⊗ U (1)

Path-Integral Measure for Gauge-Invariant Fermion Theories

Measurement of the Elastic Scattering of Neutrinos and Antineutrinos by Protons

Jets Produced in $π^{-}$ , $π^{+}$ , and Proton Interactions at 200 GeV on Hydrogen and Aluminum Targets