Volume 45, Issue 21

24 November 1980

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Editorial

A New Section for Physical Review Letters

Robert K. Adair and Gene L. Wells

Phys. Rev. Lett. 45, 1661 (1980) - Published 24 November, 1980

LETTERS

Elementary Particles and Fields

Signature $F^{+} \to p \bar{n}$ as an Unambiguous Proof of the Annihilation Mechanism

Xuan Yem Pham

Phys. Rev. Lett. 45, 1663 (1980) - Published 24 November, 1980

Nuclei

Evidence for Deformation Effect on the Giant Monopole Resonance

M. Buenerd, D. Lebrun, Ph. Martin, P. de Saintignon, and C. Perrin

Phys. Rev. Lett. 45, 1667 (1980) - Published 24 November, 1980

Splitting of the Giant Monopole Resonance with Deformation in Sm Nuclei

U. Garg, P. Bogucki, J. D. Bronson, Y. -W. Lui, C. M. Rozsa, and D. H. Youngblood

Phys. Rev. Lett. 45, 1670 (1980) - Published 24 November, 1980

Search for Quark Effects in the $d$ + ${}^{4}{He}$ System

J. B. McClelland, J. B. Carroll, G. J. Igo, J. Oostens, F. Brochard, V. Perez-Mendez, A. L. Sagle, R. Talaga, E. t. B. Whipple, and F. Zarbakhsh

Phys. Rev. Lett. 45, 1674 (1980) - Published 24 November, 1980

Parity Nonconservation in ${}^{18}F$ , ${}^{19}F$ , and ${}^{21}{Ne}$

W. C. Haxton, B. F. Gibson, and E. M. Henley

Phys. Rev. Lett. 45, 1677 (1980) - Published 24 November, 1980

Nuclear-Structure Effects on Parity Nonconservation in Light Nuclei

B. A. Brown, W. A. Richter, and N. S. Godwin

Phys. Rev. Lett. 45, 1681 (1980) - Published 24 November, 1980

Atoms and Molecules

Laser-Enhanced Lyman- $α$ Production in Collisions between Hydrogen Ions and Sodium Atoms

V. S. Kushawaha, C. E. Burkhardt, and J. J. Leventhal

Phys. Rev. Lett. 45, 1686 (1980) - Published 24 November, 1980

Initial Tests of Possible Second-Born-Term Source of Asymmetry in Forward Electron Ejection by Fast Bare Nuclei

Marianne Breinig, Stuart Elston, Ivan Sellin, Leif Liljeby, Robert Thoe, Charles R. Vane, Harvey Gould, Richard Marrus, and Roman Laubert

Phys. Rev. Lett. 45, 1689 (1980) - Published 24 November, 1980

Fluids, Plasmas, and Electric Discharges

Stability and Nonlinear Evolution of Plasma Clouds via Regularized Contour Dynamics

Edward A. Overman, II and Norman J. Zabusky

Phys. Rev. Lett. 45, 1693 (1980) - Published 24 November, 1980

Condensed Matter: Structure, Etc.

Time-Dependent Images in Transmission Electron Microscopy Associated with the Phase Transitions of Nb ${Se}_{3}$

K. K. Fung and J. W. Steeds

Phys. Rev. Lett. 45, 1696 (1980) - Published 24 November, 1980

Identification of Satellite Faces on Single Crystals of the Incommensurate Structures ${Rb}_{2}$ Zn ${Br}_{4}$ and ${Rb}_{2}$ Zn ${Cl}_{4}$

A. Janner, Th. Rasing, P. Bennema, and W. H. v. d. Linden

Phys. Rev. Lett. 45, 1700 (1980) - Published 24 November, 1980

Condensed Matter: Electronic Properties, Etc.

Alloy Clustering in ${Al}_{x} {Ga}_{1 - x} As$ -GaAs Quantum-Well Heterostructures

N. Holonyak, Jr., W. D. Laidig, B. A. Vojak, K. Hess, J. J. Coleman, P. D. Dapkus, and J. Bardeen

Phys. Rev. Lett. 45, 1703 (1980) - Published 24 November, 1980

Strain-Induced Softening of Certain Eutectics

H. Suhl, B. T. Matthias, S. Hecker, and J. L. Smith

Phys. Rev. Lett. 45, 1707 (1980) - Published 24 November, 1980

Observation of Inelastic Impurity Scattering of Electrons in the Resistivity of Potassium-Rubidium Alloys

C. W. Lee, W. P. Pratt, Jr., J. A. Rowlands, and P. A. Schroeder

Phys. Rev. Lett. 45, 1708 (1980) - Published 24 November, 1980

Resonant Optical Energy Transfer in Ruby

P. E. Jessop and A. Szabo

Phys. Rev. Lett. 45, 1712 (1980) - Published 24 November, 1980

Energy Transfer and Anderson Localization in Ruby

S. Chu, H. M. Gibbs, S. L. McCall, and A. Passner

Phys. Rev. Lett. 45, 1715 (1980) - Published 24 November, 1980

Cyclotron Resonance and Far-Infrared Magneto-Absorption Experiments on Semimetallic InAs-GaSb Superlattices

Y. Guldner, J. P. Vieren, P. Voisin, M. Voos, L. L. Chang, and L. Esaki

Phys. Rev. Lett. 45, 1719 (1980) - Published 24 November, 1980

Sharp Metal-Insulator Transition in a Random Solid

T. F. Rosenbaum, K. Andres, G. A. Thomas, and R. N. Bhatt

Phys. Rev. Lett. 45, 1723 (1980) - Published 24 November, 1980

Four-Particle Radiative Transitions of Biexcitons and Multiple Bound Excitons in Si

W. Schmid

Phys. Rev. Lett. 45, 1726 (1980) - Published 24 November, 1980

Frequency and Electric Field Dependence of the Conductivity of Metallic Polyacetylene

A. J. Epstein, H. W. Gibson, P. M. Chaikin, W. G. Clark, and G. Grüner

Phys. Rev. Lett. 45, 1730 (1980) - Published 24 November, 1980

Electronic Properties of Semiconductors with Negative- $U$ Centers

H. J. Hoffmann

Phys. Rev. Lett. 45, 1733 (1980) - Published 24 November, 1980

ERRATA

Violations of SU(6) Selection Rules from Quark Hyperfine Interactions.

Nathan Isgur, Gabriel Karl, and Roman Koniuk

Phys. Rev. Lett. 45, 1738 (1980) - Published 24 November, 1980

Doubly Coherent Production of $π^{-}$ BY ${}^{3}{He}$ Ions of 910 MeV.

E. Aslanides, P. Fassnacht, F. Hibou, E. Chiavassa, G. Dellacasa, M. Gallio, A. Musso, T. Bressani, and G. Puddu