Volume 33, Issue 1

1 July 1974

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LETTERS

Atoms, Molecules, and Related Topics

End-Point Energy Variations in the Noncharacteristic Radiation Produced by S, C1, Ar, K, Ca, and Ti Bombardment of Si

G. Bissinger and L. C. Feldman

Phys. Rev. Lett. 33, 1 (1974) - Published 1 July, 1974

New Method for Lamb-Shift Measurements

A. van Wijngaarden, G. W. F. Drake, and P. S. Farago

Phys. Rev. Lett. 33, 4 (1974) - Published 1 July, 1974

Efficient Positronium Formation by Slow Positrons Incident on Solid Targets

K. F. Canter, A. P. Mills, Jr., and S. Berko

Phys. Rev. Lett. 33, 7 (1974) - Published 1 July, 1974

Atoms, Nuclei, and Particles in Matter

Raman Scattering from Coherent Spin States in $n$ -Type Cds

R. Romestain, S. Geschwind, G. E. Devlin, and P. A. Wolff

Phys. Rev. Lett. 33, 10 (1974) - Published 1 July, 1974

Plasmas, Fluids, Thermodynamics, and Related Topics

Molecular Theory of Orientational Fluctuations and Optical Kerr Effect in the Isotropic Phase of a Liquid Crystal

C. Flytzanis and Y. R. Shen

Phys. Rev. Lett. 33, 14 (1974) - Published 1 July, 1974

Longitudinal Spin Relaxation in ${}^{3}{He}$ Gas at 4.2 K

R. Chapman and M. G. Richards

Phys. Rev. Lett. 33, 18 (1974) - Published 1 July, 1974

New Universal Quantity for the ${He}^{4}$ Superfluid Transition

M. Ferer

Phys. Rev. Lett. 33, 21 (1974) - Published 1 July, 1974

$\frac{1}{f}$ Noise from Thermal Fluctuations in Metal Films

John Clarke and Richard F. Voss

Phys. Rev. Lett. 33, 24 (1974) - Published 1 July, 1974

Solids

Electron-Magnon Bound States

Mukesh Eswaran and J. C. Kimball

Phys. Rev. Lett. 33, 27 (1974) - Published 1 July, 1974

Nuclei

Failure of the Allowed Assumption in the $\frac{ε}{β^{+}}$ Decays of ${}^{145 g}{Gd}$ and ${}^{143 g}{Sm}$ —Experimental Evidence for Interference Effects in Nuclear $β$ Decay

R. B. Firestone, R. A. Warner, Wm. C. McHarris, and W. H. Kelly

Phys. Rev. Lett. 33, 30 (1974) - Published 1 July, 1974

Elementary Particles and Fields

Measurement of the Positron-Electron Ratio in the Primary Cosmic Rays from 5 to 50 GeV

A. Buffington, C. D. Orth, and G. F. Smoot

Phys. Rev. Lett. 33, 34 (1974) - Published 1 July, 1974

Solving Equations of the Gell-Mann-Low and Callan-Symanzik Type

B. F. L. Ward

Phys. Rev. Lett. 33, 37 (1974) - Published 1 July, 1974

New Experimental Limit on $T$ Invariance in Polarized-Neutron $β$ Decay

R. I. Steinberg, P. Liaud, B. Vignon, and V. W. Hughes

Phys. Rev. Lett. 33, 41 (1974) - Published 1 July, 1974

Hadron-Neutron Forward Elastic Scattering Amplitude and Hadron-Deuteron Collisions

Victor Franco and Girish K. Varma

Phys. Rev. Lett. 33, 44 (1974) - Published 1 July, 1974

A Picture of Multiple-Meson Production

Alfred S. Goldhaber

Phys. Rev. Lett. 33, 47 (1974) - Published 1 July, 1974

ERRATA

Photoelastic Tensor of Silicon and the Volume Dependence of the Average Gap.

David K. Biegelsen

Phys. Rev. Lett. 33, 51 (1974) - Published 1 July, 1974

Physical Review Letters