Volume 50, Issue 4

24 January 1983

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LETTERS

General Physics

New Bäcklund Transformations and Superposition Principle for Gravitational Fields with Symmetries

F. J. Chinea

Phys. Rev. Lett. 50, 221 (1983) - Published 24 January, 1983

Elementary Particles and Fields

Data on the Gross-Llewellyn Smith Sum Rule as a Function of $q^{2}$

T. Bolognese, P. Fritze, J. Morfin, D. H. Perkins, K. Powell, and W. G. Scott

Phys. Rev. Lett. 50, 224 (1983) - Published 24 January, 1983

Quark Distributions in Nuclei

R. L. Jaffe

Phys. Rev. Lett. 50, 228 (1983) - Published 24 January, 1983

Masses of Superpartners of Quarks, Leptons, and Gauge Mesons in Supergravity Grand Unified Theories

R. Arnowitt, A. H. Chamseddine, and Pran Nath

Phys. Rev. Lett. 50, 232 (1983) - Published 24 January, 1983

Nuclei

Two-Body Effects and Neutron Polarization in the Reaction ${}^{2}H (γ, n) H$ at Low Energies

M. L. Rustgi, Reeta Vyas, and Manoj Chopra

Phys. Rev. Lett. 50, 236 (1983) - Published 24 January, 1983

Coexistence of Single-Particle, Collective-Quadrupole, and $α$ + ${}^{14}C$ Molecular-Dipole Degrees of Freedom in ${}^{18}O$

M. Gai, M. Ruscev, A. C. Hayes, J. F. Ennis, R. Keddy, E. C. Schloemer, S. M. Sterbenz, and D. A. Bromley

Phys. Rev. Lett. 50, 239 (1983) - Published 24 January, 1983

Fluids, Plasmas, and Electric Discharges

Electron-Cyclotron Maser Instability Driven by a Loss-Cone Distribution

Y. Y. Lau and K. R. Chu

Phys. Rev. Lett. 50, 243 (1983) - Published 24 January, 1983

Condensed Matter: Structure, Etc.

New Critical Point at the Vicinity of the Freezing Temperature of $K_{2}$ Cs

A. Voronel, I. Paperno, S. Rabinovich, and E. Lapina

Phys. Rev. Lett. 50, 247 (1983) - Published 24 January, 1983

Long-Range Periodic Decomposition of Irradiated Solid Solutions

G. Martin

Phys. Rev. Lett. 50, 250 (1983) - Published 24 January, 1983

Kinetics of Diffusion-Controlled Reactions in Polymer Melts

D. A. Bernard and J. Noolandi

Phys. Rev. Lett. 50, 253 (1983) - Published 24 January, 1983

Observation of $Δ ν = 4$ Vibrational Overtone Transitions in Solid hcp Parahydrogen

Chien-Yu Kuo, Martha M. F. Vieira, R. J. Kerl, and C. K. N. Patel

Phys. Rev. Lett. 50, 256 (1983) - Published 24 January, 1983

Coupling of Spin Waves with Zero Sound in Normal ${}^{3}{He}$

J. B. Ketterson

Phys. Rev. Lett. 50, 259 (1983) - Published 24 January, 1983

Kinetics of the $Q$ -State Potts Model in Two Dimensions

Paramdeep S. Sahni, Gary S. Grest, Michael P. Anderson, and David J. Srolovitz

Phys. Rev. Lett. 50, 263 (1983) - Published 24 January, 1983

Condensed Matter: Electronic Properties, Etc.

$L$ -Edge Absorption Spectra of the Rare Earths: Assessment of the Single-Particle Picture

G. Materlik, J. E. Müller, and J. W. Wilkins

Phys. Rev. Lett. 50, 267 (1983) - Published 24 January, 1983

Superconductivity in a New Family of Organic Conductors

S. S. P. Parkin, E. M. Engler, R. R. Schumaker, R. Lagier, V. Y. Lee, J. C. Scott, and R. L. Greene

Phys. Rev. Lett. 50, 270 (1983) - Published 24 January, 1983

Photoinduced Magnetic Effects in an Insulating Spin-Glass: Cobalt Aluminosilicate Glass

M. Ayadi and J. Ferré

Phys. Rev. Lett. 50, 274 (1983) - Published 24 January, 1983

Magnetoresistance Measurement of the Electron Inelastic Scattering Time in Two-Dimensional Al Films in the Presence of Superconducting Fluctuations

Y. Bruynseraede, M. Gijs, C. Van Haesendonck, and G. Deutscher

Phys. Rev. Lett. 50, 277 (1983) - Published 24 January, 1983

Positron Surface States on Clean and Oxidized Al and in Surface Vacancies

R. M. Nieminen and M. J. Puska

Phys. Rev. Lett. 50, 281 (1983) - Published 24 January, 1983

COMMENTS

Phonon Instabilities in Electronically Excited Semiconductors

Vinay Ambegaokar and Rana Biswas

Phys. Rev. Lett. 50, 285 (1983) - Published 24 January, 1983

Bok and Combescot Respond

Julien Bok and Monique Combescot

Phys. Rev. Lett. 50, 286 (1983) - Published 24 January, 1983

Physical Review Letters