Volume 51, Issue 7

15 August 1983

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LETTERS

General Physics

Phase Transitions in New Solvable Hamiltonians by a Hamiltonian Minimization

Mehran Kardar

Phys. Rev. Lett. 51, 523 (1983) - Published 15 August, 1983

Confirmation of Dynamical Scaling at the Percolation Threshold

R. B. Pandey and D. Stauffer

Phys. Rev. Lett. 51, 527 (1983) - Published 15 August, 1983

Elementary Particles and Fields

Four-Dimensional Ashkin-Teller Gauge Theory

Francisco C. Alcaraz and Laurence Jacobs

Phys. Rev. Lett. 51, 530 (1983) - Published 15 August, 1983

Comparison of the Deep-Inelastic Structure Functions of Deuterium and Aluminum Nuclei

A. Bodek, N. Giokaris, W. B. Atwood, D. H. Coward, D. L. Dubin, M. Breidenbach, J. E. Elias, J. I. Friedman, H. W. Kendall, J. S. Poucher, and E. M. Riordan

Phys. Rev. Lett. 51, 534 (1983) - Published 15 August, 1983

Faddeev-Popov Zeros and Confinement of Color in a Hyperspherical Gauge Model

R. E. Cutkosky

Phys. Rev. Lett. 51, 538 (1983) - Published 15 August, 1983

Nuclei

Atomic-Charge-State Distributions of Fusion-Evaporation Residues and Nuclear Shape Changes at High Spin

T. M. Cormier, P. M. Cormier, M. Herman, N. G. Nicolis, and P. M. Stwertka

Phys. Rev. Lett. 51, 542 (1983) - Published 15 August, 1983

Atoms and Molecules

Variational Fit to the Nonlocal Electron-Electron Exchange Potential: Is an Accurate $N^{3}$ Hartree-Fock Method Possible?

B. I. Dunlap

Phys. Rev. Lett. 51, 546 (1983) - Published 15 August, 1983

Theory of Spontaneous-Emission Line Shape in an Ideal Cavity

J. J. Sanchez-Mondragon, N. B. Narozhny, and J. H. Eberly

Phys. Rev. Lett. 51, 550 (1983) - Published 15 August, 1983

Detection of the Hydronium Ion ( $H_{3}$ $O^{+}$ ) by High-Resolution Infrared Spectroscopy

M. H. Begemann, C. S. Gudeman, J. Pfaff, and R. J. Saykally

Phys. Rev. Lett. 51, 554 (1983) - Published 15 August, 1983

Effect of Extrinsic Electric Fields upon Dielectronic Recombination: ${Mg}^{1 +}$

K. LaGattuta and Y. Hahn

Phys. Rev. Lett. 51, 558 (1983) - Published 15 August, 1983

Classical Phenomenology and Applications

Observation of Period Doubling in an All-Optical Resonator Containing N $H_{3}$ Gas

R. G. Harrison, W. J. Firth, C. A. Emshary, and I. A. Al-Saidi

Phys. Rev. Lett. 51, 562 (1983) - Published 15 August, 1983

Fluids, Plasmas, and Electric Discharges

Demonstration of a Two-Stage Backward-Wave-Oscillator Free-Electron Laser

Y. Carmel, V. L. Granatstein, and A. Gover

Phys. Rev. Lett. 51, 566 (1983) - Published 15 August, 1983

Double-Shell-Target Implosion by Four Beams from the GEKKO IV Laser System

Y. Kitagawa, N. Miyanaga, H. Hama, T. Yabe, K. Fujiwara, Y. Kawai, M. Nakatsuka, T. Norimatsu, Y. Izawa, T. Yamanaka, and C. Yamanaka

Phys. Rev. Lett. 51, 570 (1983) - Published 15 August, 1983

Absolute Parametric Instabilities in Inhomogeneous Plasmas

G. Picard and T. W. Johnston

Phys. Rev. Lett. 51, 574 (1983) - Published 15 August, 1983

Condensed Matter: Structure, Etc.

Anomalous Surface Phonon Dispersion Relations for Ag(111) Measured by Inelastic Scattering of He Atoms

R. B. Doak, U. Harten, and J. Peter Toennies

Phys. Rev. Lett. 51, 578 (1983) - Published 15 August, 1983

Evidence for a Commensurate-Incommensurate Phase Transition with an Intermediate Fluid Phase: $N_{2}$ Adsorbed on Ni(110)

M. Grunze, P. H. Kleban, W. N. Unertl, and Franz S. Rys

Phys. Rev. Lett. 51, 582 (1983) - Published 15 August, 1983

Melting and Wetting Behavior in Oxygen Films

D. D. Awschalom, G. N. Lewis, and S. Gregory

Phys. Rev. Lett. 51, 586 (1983) - Published 15 August, 1983

Observation of the Mechanical Response of the Condensate in He- $B$ in the Regime of Negligible Normal Fluid Density

A. M. Guénault, V. Keith, C. J. Kennedy, and G. R. Pickett

Phys. Rev. Lett. 51, 589 (1983) - Published 15 August, 1983

Condensed Matter: Electronic Properties, Etc.

Role of Electromagnetic Resonances in the Surface-Enhanced Raman Effect

S. A. Lyon and J. M. Worlock

Phys. Rev. Lett. 51, 593 (1983) - Published 15 August, 1983

Density-Functional Theory of Excitation Spectra of Semiconductors: Application to Si

C. S. Wang and W. E. Pickett

Phys. Rev. Lett. 51, 597 (1983) - Published 15 August, 1983

Effects of Oxygen Content on Pressure-Induced Superconductivity in Eu ${Mo}_{6}$ $S_{8}$

D. W. Capone, II, R. P. Guertin, S. Foner, D. G. Hinks, and Hung-Chen Li

Phys. Rev. Lett. 51, 601 (1983) - Published 15 August, 1983

Fractional Quantization of the Hall Effect: A Hierarchy of Incompressible Quantum Fluid States

F. D. M. Haldane

Phys. Rev. Lett. 51, 605 (1983) - Published 15 August, 1983

Geophysics, Astronomy, and Astrophysics

Nuclei with an Extra Quark, Stellar Burning, and the Solar Neutrino Problem

R. N. Boyd, R. E. Turner, M. Wiescher, and L. Rybarcyk

Phys. Rev. Lett. 51, 609 (1983) - Published 15 August, 1983

COMMENTS

Comment on "Collapse of Longitudinal Waves in a Plasma"

K. Rypdal, J. Juul Rasmussen, and K. Thomsen

Phys. Rev. Lett. 51, 613 (1983) - Published 15 August, 1983

Tskhakaia Responds

Davy D. Tskhakaia

Phys. Rev. Lett. 51, 614 (1983) - Published 15 August, 1983

Comment on "de Haas-van Alphen Study of Coherent Magnetic Breakdown in Magnesium"

Lorenz Lorenzen and Henrik Smith

Phys. Rev. Lett. 51, 615 (1983) - Published 15 August, 1983

ERRATA

Measurement of "Subthreshold" Production of $K^{-}$ and Antiprotons in Relativistic Nuclear Collisions

A. Shor, K. Ganezer, S. Abachi, J. Carroll, J. Geaga, G. Igo, P. Lindstrom, T. Mulera, V. Perez-Mendez, A. Sagle, D. Woodard, and F. Zarbakhsh

Phys. Rev. Lett. 51, 616 (1983) - Published 15 August, 1983

Criticality of the Anisotropic Quantum Heisenberg Model on a Self-Dual Hierarchical Lattice

Aníbal O. Caride, Constantino Tsallis, and Susana I. Zanette

Phys. Rev. Lett. 51, 616 (1983) - Published 15 August, 1983