Volume 29, Issue 26

V. Bartenev, A. Kuznetsov, B. Morozov, V. Nikitin, Y. Pilipenko, V. Popov, L. Zolin, R. Carrigan, E. Malamud, R. Yamada, R. L. Cool, K. Goulianos, S. L. Olsen, I-Hung Chiang, A. C. Melissinos, and D. Gross

Phys. Rev. Lett. 29, 1755 (1972) - Published 25 December, 1972

Reaction $p + p \to γ^{+}$ Anything at 205 GeV and Its Implications for $π^{0}$ Production

G. Charlton, Y. Cho, M. Derrick, R. Engelmann, T. Fields, L. Hyman, K. Jaeger, U. Mehtani, B. Musgrave, Y. Oren, D. Rhines, P. Schreiner, H. Yuta, L. Voyvodic, R. Walker, J. Whitmore, H. B. Crawley, Z. Ming Ma, and R. G. Glasser

Phys. Rev. Lett. 29, 1759 (1972) - Published 25 December, 1972

Role of $π$ in High-Energy $n - p$ Charge Exchange

M. Glück

Phys. Rev. Lett. 29, 1762 (1972) - Published 25 December, 1972

Lepton Symmetry

Sydney Meshkov and S. Peter Rosen

Phys. Rev. Lett. 29, 1764 (1972) - Published 25 December, 1972

ERRATA

Observation of a Frequency Dependence in the Conduction-Electron Spin Resonance of Al, Cu, and Ag, Interpreted as a New Many-Body Effect in Metals with $g$ Anisotropy

D. Lubzens, M. R. Shanabarger, and S. Schultz

Phys. Rev. Lett. 29, 1768 (1972) - Published 25 December, 1972

Elastic Constants of Argon and Neon by Brillouin Scattering from Single Crystals near Their Triple Points

S. Gewurtz, H. Kiefte, D. Landheer, R. A. McLaren, and B. P. Stoicheff

Phys. Rev. Lett. 29, 1768 (1972) - Published 25 December, 1972

Physical Review Letters

Volume 29, Issue 26

Notice

Two Special Errata. A New Requirement

LETTERS

Atoms, Molecules, and Related Topics

Effect of Multiple Ionization on the Fluorescence Yield of Ne

Plasmas, Fluids, Thermodynamics, and Related Topics

Diffusion-Limited Destruction of Metastable States in He II

Measurement of the dc Plasma Electric Resistivity Perpendicular to the Magnetic Surface

Second-Order Effects in the Weibel Instability

Instability of a Relativistically Strong Electromagnetic Wave of Circular Polarization

Solids

Structure in the Brillouin Spectra of Thin Films

Hopping Conduction through Localized States in Nb/ ${Al}_{2}$ $O_{3}$ Films

Distortion-Enhanced Optical Absorption in SrTi $O_{3}$ at the Cubic-to-Tetragonal Transition

Nuclei

Total Neutron Cross Section of Deuterium below 1000 keV

Excitation of the Parent Analogs of the ${}^{58}{Ni}$ Giant $M 1$ Resonance by the Reaction ${}^{58}{Ni} (t, h) {}^{58}{Co}$

Elementary Particles and Fields

Recoil-Proton Polarization in Neutral-Pion Photoproduction and in Proton Compton Scattering

Small-Angle Elastic Proton-Proton Scattering from 25 to 200 GeV