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Physical Review Letters

Volume 19, Issue 5

31 July 1967

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LETTERS

Nuclear Alignment of the ${}^{1}S_{0}$ Ground State of ${}^{131}{Xe}$ by Electron Pumping and Metastability-Exchange Collisions

Tetsuo Hadeishi and Chung-Heng Liu

Phys. Rev. Lett. 19, 211 (1967) - Published 31 July, 1967

Threshold for Superfluid Vortex Lines in a Rotating Annulus

Philip J. Bendt and Russell J. Donnelly

Phys. Rev. Lett. 19, 214 (1967) - Published 31 July, 1967

Measurements of Angular Momentum in Superfluid Helium

G. B. Hess and W. M. Fairbank

Phys. Rev. Lett. 19, 216 (1967) - Published 31 July, 1967

Plasma Wave Echo

R. W. Gould, T. M. O'Neil, and J. H. Malmberg

Phys. Rev. Lett. 19, 219 (1967) - Published 31 July, 1967

Nondirect Processes and Optical Properties of Metals

R. K. Nesbet and P. M. Grant

Phys. Rev. Lett. 19, 222 (1967) - Published 31 July, 1967

Direct Electromagnetic Generation of Acoustic Waves

J. R. Houck, H. V. Bohm, B. W. Maxfield, and J. W. Wilkins

Phys. Rev. Lett. 19, 224 (1967) - Published 31 July, 1967

Thermomagnetic Effects in Superconducting Niobium

A. T. Fiory and B. Serin

Phys. Rev. Lett. 19, 227 (1967) - Published 31 July, 1967

Amplitude-Independent Ultrasonic Attenuation in Superconducting Lead

W. A. Fate and R. W. Shaw

Phys. Rev. Lett. 19, 230 (1967) - Published 31 July, 1967

Energy of Motion of Vacancies in Tungsten

Dexter Jeannotte and J. M. Galligan

Phys. Rev. Lett. 19, 232 (1967) - Published 31 July, 1967

Soft Optic Modes in Barium Titanate

G. Shirane, B. C. Frazer, V. J. Minkiewicz, J. A. Leake, and A. Linz

Phys. Rev. Lett. 19, 234 (1967) - Published 31 July, 1967

Nonparabolicity of the $L_{1}$ Conduction Band in Germanium from Magnetopiezotransmission Experiments

R. L. Aggarwal, M. D. Zuteck, and Benjamin Lax

Phys. Rev. Lett. 19, 236 (1967) - Published 31 July, 1967

Effect of the Pauli Principle in $O^{16}$ - $O^{16}$ Elastic Scattering

Barry Block and F. B. Malik

Phys. Rev. Lett. 19, 239 (1967) - Published 31 July, 1967

Elastic Electron Scattering from Lead-208 at 175 and 250 MeV

J. B. Bellicard and K. J. van Oostrum

Phys. Rev. Lett. 19, 242 (1967) - Published 31 July, 1967

Exclusion Principle and the Neutron-Alpha Equivalent Potential

Peter Swan

Phys. Rev. Lett. 19, 245 (1967) - Published 31 July, 1967

Total Muon-Capture Rate and the Consistency of Migdal's Theory

Mannque Rho

Phys. Rev. Lett. 19, 248 (1967) - Published 31 July, 1967

Short-Period Variations of Cosmic-Ray Intensity

M. S. Dhanju and V. A. Sarabhai

Phys. Rev. Lett. 19, 252 (1967) - Published 31 July, 1967

Nonuniqueness of Mass-Formulas from Infinite-Dimensional Groups and Algebras

Moshé Flato and Daniel Sternheimer

Phys. Rev. Lett. 19, 254 (1967) - Published 31 July, 1967

Search for $S = + 1$ Baryon States in Photoproduction

J. Tyson, J. S. Greenberg, V. W. Hughes, D. C. Lu, R. C. Minehart, S. Mori, and J. E. Rothberg

Phys. Rev. Lett. 19, 255 (1967) - Published 31 July, 1967

New Structures in the $K^{+} - p$ AND $K^{+} - d$ Total Cross Sections Between 1.55 and 3.30 GeV/c

R. J. Abrams, R. L. Cool, G. Giacomelli, T. F. Kycia, B. A. Leontić, K. K. Li, and D. N. Michael

Phys. Rev. Lett. 19, 259 (1967) - Published 31 July, 1967

$K^{0}$ Photoproduction Cross Sections Compared to Quark-Model Predictions

Charles E. Roos, Joe H. Mullins, and Donald G. Coyne

Phys. Rev. Lett. 19, 261 (1967) - Published 31 July, 1967

Asymptotic SU(3), Superconvergence, and the $K_{l 3}$ Form-Factor $F_{+}$

L. K. Pandit

Phys. Rev. Lett. 19, 263 (1967) - Published 31 July, 1967

Large-Angle $\bar{p} p$ Elastic Scattering at 3.66 GeV/c

W. M. Katz, B. Forman, and T. Ferbel

Phys. Rev. Lett. 19, 265 (1967) - Published 31 July, 1967

Pion Photoproduction at O°

S. D. Drell and J. D. Sullivan

Phys. Rev. Lett. 19, 268 (1967) - Published 31 July, 1967

Kinematic Interpretation of the Low-Mass $K π π$ Enhancement in $Kp π π$ Final States

Peter J. Dornan, Virgil E. Barnes, George R. Kalbfleisch, Ian O. Skillicorn, Marvin Goldberg, Barton Goz, Richard Wolfe, and Jack Leitner

Phys. Rev. Lett. 19, 271 (1967) - Published 31 July, 1967

Asymptotic Chiral Symmetry

J. Schechter and G. Venturi

Phys. Rev. Lett. 19, 276 (1967) - Published 31 July, 1967

Determination of the Scattering Amplitudes from Polarization Measurements

Markus Simonius

Phys. Rev. Lett. 19, 279 (1967) - Published 31 July, 1967

ERRATA

Total and Differential Cross Sections for $π^{-} + p \to η + n$ from Threshold to 1300 MeV.

W. Bruce Richards, Charles B. Chiu, Richard D. Eandi, A. Carl Helmholz, Robert W. Kenney, Burton J. Moyer, John A. Poirier, Robert J. Cence, Vincent Z. Peterson, Narender K. Sehgal, and Victor J. Stenger

Phys. Rev. Lett. 19, 281 (1967) - Published 31 July, 1967

Exact Relation for Magnon Theories of Magnetism and Its Consequences in Calculations of Magnon Specific Heats.

R. E. Mills

Phys. Rev. Lett. 19, 281 (1967) - Published 31 July, 1967