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Physical Review Letters

Volume 26, Issue 25

21 June 1971

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LETTERS

Atoms, Molecules, and Related Topics

Raising of Discrete Levels into the Far Continuum

J. L. Dehmer, A. F. Starace, U. Fano, J. Sugar, and J. W. Cooper

Phys. Rev. Lett. 26, 1521 (1971) - Published 21 June, 1971

Plasmas, Fluids, Thermodynamics, and Related Topics

Hydrodynamics of Nematic Liquid Crystals

Huey-Wen Huang

Phys. Rev. Lett. 26, 1525 (1971) - Published 21 June, 1971

Modulated Electron-Beam Excitation of Low-Frequency Plasma-Cavity Modes

V. P. Bhatnagar and W. D. Getty

Phys. Rev. Lett. 26, 1527 (1971) - Published 21 June, 1971

Phonon Excitations in Liquid He II

A. Molinari and T. Regge

Phys. Rev. Lett. 26, 1531 (1971) - Published 21 June, 1971

Chemical Potential of ${He}^{3}$ - ${He}^{4}$ Solutions Near the Tricritical Point

Gregory Goellner and Horst Meyer

Phys. Rev. Lett. 26, 1534 (1971) - Published 21 June, 1971

Solids

Theory of Fluctuation-Induced Diamagnetism in Superconductors

Patrick A. Lee and Marvin G. Payne

Phys. Rev. Lett. 26, 1537 (1971) - Published 21 June, 1971

Existence of a Gap in the Electronic Density of States of a Tetrahedrally Bonded Solid of Arbitrary Structure

D. Weaire

Phys. Rev. Lett. 26, 1541 (1971) - Published 21 June, 1971

Surface and Pseudosurface Modes in Ionic Crystals

T. S. Chen, G. P. Alldredge, F. W. de Wette, and R. E. Allen

Phys. Rev. Lett. 26, 1543 (1971) - Published 21 June, 1971

Ground-State Properties in the Kondo Problem

V. J. Emery and A. Luther

Phys. Rev. Lett. 26, 1547 (1971) - Published 21 June, 1971

Electron-Phonon Umklapp Interaction in the Low-Temperature Electrical Resistivity of Potassium

J. W. Ekin

Phys. Rev. Lett. 26, 1550 (1971) - Published 21 June, 1971

Short-Wavelength Cyclotron Waves and Electron Correlations in Potassium

G. L. Dunifer, P. H. Schmidt, and W. M. Walsh, Jr.

Phys. Rev. Lett. 26, 1553 (1971) - Published 21 June, 1971

Kinematic Low-Energy Electron-Diffraction Intensities from Averaged Data: A Method for Surface Crystallography

Max G. Lagally, Tran C. Ngoc, and Maurice B. Webb

Phys. Rev. Lett. 26, 1557 (1971) - Published 21 June, 1971

Multiple Reflections in Gantmakher-Kaner Oscillations

R. F. Milligan and T. G. Castner, Jr.

Phys. Rev. Lett. 26, 1560 (1971) - Published 21 June, 1971

Electronic Structure of Crystalline and Amorphous ${As}_{2}$ $S_{3}$ and ${As}_{2}$ ${Se}_{3}$

R. Zallen, R. E. Drews, R. L. Emerald, and M. L. Slade

Phys. Rev. Lett. 26, 1564 (1971) - Published 21 June, 1971

Neutron Scattering and Second Magnon in Anisotropic Antiferromagnets

K. H. Michel and F. Schwabl

Phys. Rev. Lett. 26, 1568 (1971) - Published 21 June, 1971

Facet-Related Site Selectivity for Rare-Earth Ions in Yttrium Aluminum Garnet

R. Wolfe, M. D. Sturge, F. R. Merritt, and L. G. Van Uitert

Phys. Rev. Lett. 26, 1570 (1971) - Published 21 June, 1971

Variation of Characteristic Energy Losses in the Curie-Temperature Region of Ni (111)

B. Heimann and J. Hölzl

Phys. Rev. Lett. 26, 1573 (1971) - Published 21 June, 1971

Nuclei

Positive-Parity States in Odd-Even As Isotopes

R. R. Betts, D. J. Pullen, W. Scholz, and B. Rosner

Phys. Rev. Lett. 26, 1576 (1971) - Published 21 June, 1971

Observation of 1.5% Parity-Nonconserving $γ$ -Ray Asymmetry

K. S. Krane, C. E. Olsen, James R. Sites, and W. A. Steyert

Phys. Rev. Lett. 26, 1579 (1971) - Published 21 June, 1971

Cross Section of Slow Neutrons on Parahydrogen

Theodore L. Houk, David Shambroom, and Richard Wilson

Phys. Rev. Lett. 26, 1581 (1971) - Published 21 June, 1971

Elementary Particles and Fields

Single-Particle Distributions of $π$ Mesons Produced in $π^{+} p$ , $K^{+} p$ , $pp$ , and $π^{-} p$ Collisions at High Energies

M.-S. Chen, R. R. Kinsey, T. W. Morris, R. S. Panvini, L.-L. Wang, T. F. Wong, S. L. Stone, T. Ferbel, P. Slattery, B. Werner, J. W. Elbert, and A. R. Erwin

Phys. Rev. Lett. 26, 1585 (1971) - Published 21 June, 1971

Longitudinal- and Transverse-Momentum Distributions for $π^{-}$ Mesons in $18.5 - \frac{GeV}{c} π^{\pm} p$ Interactions

N. N. Biswas, N. M. Cason, V. P. Kenney, J. T. Powers, W. D. Shephard, and D. W. Thomas

Phys. Rev. Lett. 26, 1589 (1971) - Published 21 June, 1971

Photoproduction of $ϕ^{0}$ Mesons from Hydrogen, Deuterium, and Complex Nuclei

G. McClellan, N. Mistry, P. Mostek, H. Ogren, A. Osborne, J. Swartz, R. Talman, and G. Diambrini-Palazzi

Phys. Rev. Lett. 26, 1593 (1971) - Published 21 June, 1971

Photoproduction of $ϕ^{0}$ Mesons from Hydrogen and Carbon by Linearly Polarized Photons

G. McClellan, N. Mistry, B. Sandler, J. Swartz, R. Talman, P. Walstrom, and G. Diambrini-Palazzi

Phys. Rev. Lett. 26, 1597 (1971) - Published 21 June, 1971

Forward Compton Scattering from Hydrogen and Deuterium at 8 and 16 GeV

A. M. Boyarski, D. H. Coward, S. Ecklund, B. Richter, D. Sherden, R. Siemann, and C. Sinclair

Phys. Rev. Lett. 26, 1600 (1971) - Published 21 June, 1971

Is CP-Invariance Violation Caused by an SU(3) Singlet?

J. Nuyts

Phys. Rev. Lett. 26, 1604 (1971) - Published 21 June, 1971

Dynamics of Broken $SU (3) \otimes SU (3)$

Richard A. Brandt and Giuliano Preparata

Phys. Rev. Lett. 26, 1605 (1971) - Published 21 June, 1971

Description of High-Energy Scattering

B. B. Deo and M. K. Parida

Phys. Rev. Lett. 26, 1609 (1971) - Published 21 June, 1971

ERRATA

Temperature Dependence of Critical Opalescence in Carbon Dioxide

John A. White and Bruce S. Maccabee

Phys. Rev. Lett. 26, 1612 (1971) - Published 21 June, 1971