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Physical Review Letters

Volume 21, Issue 4

22 July 1968

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LETTERS

Positronium Diffusion in Solids

Werner Brandt and Robert Paulin

Phys. Rev. Lett. 21, 193 (1968) - Published 22 July, 1968

Stimulated Infrared Emission from Optical Phonons

J. P. Biscar, R. Braunstein, and S. Gratch

Phys. Rev. Lett. 21, 195 (1968) - Published 22 July, 1968

Decay of Superfluid "Persistent Currents"

G. Kukich, R. P. Henkel, and J. D. Reppy

Phys. Rev. Lett. 21, 197 (1968) - Published 22 July, 1968

Vortex-Ring Interactions in Superfluid Liquid Helium

G. Gamota and T. M. Sanders, Jr.

Phys. Rev. Lett. 21, 200 (1968) - Published 22 July, 1968

Spectrum of Light Scattering from Thermal Shear Waves in Liquids

G. I. A. Stegeman and B. P. Stoicheff

Phys. Rev. Lett. 21, 202 (1968) - Published 22 July, 1968

Observations of Nonlinear Damping of Tonks-Dattner Resonances

J. F. Decker and C. W. Mendel, Jr.

Phys. Rev. Lett. 21, 206 (1968) - Published 22 July, 1968

Self-Trapping and Instability of Hydromagnetic Waves Along the Magnetic Field in a Cold Plasma

T. Taniuti and H. Washimi

Phys. Rev. Lett. 21, 209 (1968) - Published 22 July, 1968

Capacitance Observations of Landau Levels in Surface Quantization

M. Kaplit and J. N. Zemel

Phys. Rev. Lett. 21, 212 (1968) - Published 22 July, 1968

Singlet Exciton-Exciton Interaction in Anthracene

C. L. Braun

Phys. Rev. Lett. 21, 215 (1968) - Published 22 July, 1968

Effect of Surface Strains on the Diamagnetic and Field-Retaining Properties of Type-i Hollow Cylinders

Donald G. Schweitzer, Peter D. Adams, and Louis J. Nicolosi

Phys. Rev. Lett. 21, 220 (1968) - Published 22 July, 1968

Calculation of Energetic Deuteron Momentum Spectra from Proton-Nucleus Collisions at BeV

A. Rotsstein and A. Van Ginneken

Phys. Rev. Lett. 21, 223 (1968) - Published 22 July, 1968

( $p, p^{'} n$ ), ( $p, p^{'} γ$ ), and ( $p, n p^{'}$ ) Reactions on ${Sn}^{119}$ and ${Ni}^{61}$

B. L. Cohen, E. C. May, T. M. O'Keefe, C. L. Fink, and B. Rosner

Phys. Rev. Lett. 21, 226 (1968) - Published 22 July, 1968

Reaction ${Li}^{6} (π^{+}, p p) {He}^{4}$ and $T = 1$ States in ${He}^{4}$

R. L. Burman and M. E. Nordberg, Jr.

Phys. Rev. Lett. 21, 229 (1968) - Published 22 July, 1968

Nuclear Spectroscopy with Average Spectra from Neutron Resonance Capture

L. M. Bollinger and G. E. Thomas

Phys. Rev. Lett. 21, 233 (1968) - Published 22 July, 1968

High-Spin Isomer ${Ir}^{194 m_{2}}$ Produced by Triple Neutron Capture

A. W. Sunyar, G. Scharff-Goldhaber, and M. McKeown

Phys. Rev. Lett. 21, 237 (1968) - Published 22 July, 1968

Chiral Symmetry and the Pion Mass

P. B. Kantor and J. L. Pietenpol

Phys. Rev. Lett. 21, 241 (1968) - Published 22 July, 1968

Gauge Invariance, Broken Symmetries, and Field-Current Identities

Tulsi Dass

Phys. Rev. Lett. 21, 242 (1968) - Published 22 July, 1968

Finite-Width Corrections to the Vector-Meson-Dominance Prediction for $ρ \to e^{+} e^{-}$

G. J. Gounaris and J. J. Sakurai

Phys. Rev. Lett. 21, 244 (1968) - Published 22 July, 1968

Measurements of Single $π^{-}$ and $π^{+}$ Photoproduction at Small Momentum Transfers

P. Heide, U. Kötz, R. A. Lewis, P. Schmüser, H. J. Skronn, and H. Wahl

Phys. Rev. Lett. 21, 248 (1968) - Published 22 July, 1968

Lorentz Invariance in Reggeization of Pion Photoproduction Amplitudes

T. Ebata and K. E. Lassila

Phys. Rev. Lett. 21, 250 (1968) - Published 22 July, 1968

Experimental Evidence Against the Existence of Strange Leptons

Kenneth K. Young, Jerome A. Helland, and Michael J. Longo

Phys. Rev. Lett. 21, 254 (1968) - Published 22 July, 1968

Experimental Determination of $Re ξ$ from $K_{μ 3}^{0}$ Decay

Jerome A. Helland, Michael J. Longo, and Kenneth K. Young

Phys. Rev. Lett. 21, 257 (1968) - Published 22 July, 1968

Precise Comparison of $π^{+}$ and $π^{-}$ Lifetimes

David S. Ayres, Allan M. Cormack, Arthur J. Greenberg, Robert W. Kenney, David O. Caldwell, Virgil B. Elings, William P. Hesse, and Rollin J. Morrison

Phys. Rev. Lett. 21, 261 (1968) - Published 22 July, 1968

ERRATA

Evidence for $A_{1}^{0}$ Production in $K^{-} p$ Interactions at 4.6 and 5.0 BeV/c.

R. E. Juhala, R. A. Leacock, J. I. Rhode, J. B. Kopelman, L. Marshall Libby, and E. Urvater

Phys. Rev. Lett. 21, 266 (1968) - Published 22 July, 1968

Second-Harmonic Generation of Light at the Boundary of Alkali Halides and Glasses.

Charles C. Wang and A. N. Duminski

Phys. Rev. Lett. 21, 266 (1968) - Published 22 July, 1968

Fourth test of General Relativity: Preliminary Results.

Irwin I. Shapiro, Gordon H. Pettengill, Michael E. Ash, Melvin L. Stone, William B. Smith, Richard P. Ingalls, and Richard A. Brockelman

Phys. Rev. Lett. 21, 266 (1968) - Published 22 July, 1968

Icarus: Further Confirmation of the Relativistic Perihelion Precession.

Irwin I. Shapiro, Michael E. Ash, and William B. Smith

Phys. Rev. Lett. 21, 266 (1968) - Published 22 July, 1968

Some Considerations on the Intermediate-Boson Hypothesis and $CP$ Nonconservation.

S. Pakvasa, S. F. Tuan, and Tai Tsun Wu

Phys. Rev. Lett. 21, 266 (1968) - Published 22 July, 1968