Volume 29, Issue 24

11 December 1972

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LETTERS

Atoms, Molecules, and Related Topics

Projectile Structure Effects on Neon $K$ X-Ray Production by Fast, Highly Ionized Argon Beams

J. Richard Mowat, D. J. Pegg, R. S. Peterson, P. M. Griffin, and I. A. Sellin

Phys. Rev. Lett. 29, 1577 (1972) - Published 11 December, 1972

Vibrational Excitation in CO by Electron Impact in the Energy Range 10-90 eV

Ara Chutjian, Donald G. Truhlar, Walter Williams, and Sandor Trajmar

Phys. Rev. Lett. 29, 1580 (1972) - Published 11 December, 1972

Plasmas, Fluids, Thermodynamics, and Related Topics

Orienting Action of Sound on Nematic Liquid Crystals

W. Helfrich

Phys. Rev. Lett. 29, 1583 (1972) - Published 11 December, 1972

Multiple Soliton Production and the Korteweg—de Vries Equation

Noah Hershkowitz, Thomas Romesser, and David Montgomery

Phys. Rev. Lett. 29, 1586 (1972) - Published 11 December, 1972

Reduction by Magnetic Focusing of Multiple Coulomb Scattering Losses in Devices Containing Fully Ionized Matter

Robert A. Miller

Phys. Rev. Lett. 29, 1590 (1972) - Published 11 December, 1972

Solids

Superconductivity and Phonon Softening

Philip B. Allen and Marvin L. Cohen

Phys. Rev. Lett. 29, 1593 (1972) - Published 11 December, 1972

Photoconductivity and Luminescence Caused by Band-Band and by ${Cr}^{3 +}$ Crystal Field Absorptions in Cd ${Cr}_{2}$ $S_{4}$

P. K. Larsen and S. Wittekoek

Phys. Rev. Lett. 29, 1597 (1972) - Published 11 December, 1972

Band Narrowing and the $T$ -Matrix Pole

G. Horwitz and D. Jacobi

Phys. Rev. Lett. 29, 1600 (1972) - Published 11 December, 1972

Multiphonon Processes in the Two-Photon Absorption of T1C1 and the Temperature Dependence of the Band Edge

D. Fröhlich, J. Treusch, and W. Kottler

Phys. Rev. Lett. 29, 1603 (1972) - Published 11 December, 1972

Two-Phonon Deformation Potential in InSb

K. L. Ngai and E. J. Johnson

Phys. Rev. Lett. 29, 1607 (1972) - Published 11 December, 1972

Evaluation of Two-Phonon Deformation Potential of Ge

P. J. Lin-Chung and K. L. Ngai

Phys. Rev. Lett. 29, 1610 (1972) - Published 11 December, 1972

Nuclei

Further Evidence for the Dominance of Nucleon-Nucleon $P$ -Wave Forces in Vector Polarizations in $N - d$ Scattering below 15 MeV

J. S. C. McKee, H. E. Conzett, R. M. Larimer, and Ch. Leemann

Phys. Rev. Lett. 29, 1613 (1972) - Published 11 December, 1972

Elementary Particles and Fields

Perturbations on the Mixmaster Universe

B. L. Hu and T. Regge

Phys. Rev. Lett. 29, 1616 (1972) - Published 11 December, 1972

$π^{0}$ Photoproduction from Neutrons

A. M. Osborne, A. Brownam, K. Hanson, W. T. Meyer, A. Silverman, F. E. Taylor, and N. Horwitz

Phys. Rev. Lett. 29, 1621 (1972) - Published 11 December, 1972

Evidence for the Onset of Semi-inclusive Scaling in Proton-Proton Collisions in the $50 - 300 - \frac{GeV}{c}$ Momentum Range

P. Slattery

Phys. Rev. Lett. 29, 1624 (1972) - Published 11 December, 1972

$pp$ Interactions at $303 \frac{GeV}{c}$ : Multiplicity and Total Cross Section

F. T. Dao, D. Gordon, J. Lach, E. Malamud, T. Meyer, R. Poster, and W. Slater

Phys. Rev. Lett. 29, 1627 (1972) - Published 11 December, 1972

Measurement of the $Ξ^{-}$ Magnetic Moment

R. L. Cool, G. Giacomelli, E. W. Jenkins, T. F. Kycia, B. A. Leontić, K. K. Li, and J. Teiger

Phys. Rev. Lett. 29, 1630 (1972) - Published 11 December, 1972

Evidence for Duality Constraints in $Δ \to π + Δ (1236)$ Decays

U. Mehtani, S. Y. Fung, A. Kernan, T. L. Schalk, Y. Williamson, R. W. Birge, G. E. Kalmus, and W. Michael

Phys. Rev. Lett. 29, 1634 (1972) - Published 11 December, 1972

ERRATA

Theory of Diamagnetism of Cadmium Alloys

J. W. McClure and J. Martyniuk

Phys. Rev. Lett. 29, 1638 (1972) - Published 11 December, 1972

Physical Review Letters