Volume 28, Issue 7

14 February 1972

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Editorial

Another Worked-Out Mine

George L. Trigg

Phys. Rev. Lett. 28, 393 (1972) - Published 14 February, 1972

Notice

Word Equivalent of Length Limit

Phys. Rev. Lett. 28, 394 (1972) - Published 14 February, 1972

LETTERS

Atoms, Molecules, and Related Topics

Observations of Anomalous Transparency in Bound-Free Transitions of ${Cl}_{2}$

R. C. Sepucha and S. S. Penner

Phys. Rev. Lett. 28, 395 (1972) - Published 14 February, 1972

Collisional Excitation of $N^{+}$ at 50 keV

D. H. Crandall, G. York, V. Pol, and J. T. Park

Phys. Rev. Lett. 28, 397 (1972) - Published 14 February, 1972

Computation of Elastic Scattering Phase Shifts via Analytic Continuation of Fredholm Determinants Constructed Using an $L^{2}$ Basis

W. P. Reinhardt, D. W. Oxtoby, and T. N. Rescigno

Phys. Rev. Lett. 28, 401 (1972) - Published 14 February, 1972

Plasmas, Fluids, Thermodynamics, and Related Topics

Effect of Trapped Particles on the Nonlinear Evolution of a Wave Packet

J. Denavit and R. N. Sudan

Phys. Rev. Lett. 28, 404 (1972) - Published 14 February, 1972

Direct Observation of Waves Propagating near the Lower-Hybrid-Resonance Frequency

W. M. Hooke and S. Bernabei

Phys. Rev. Lett. 28, 407 (1972) - Published 14 February, 1972

Ion Heating in High—Mach-Number, Oblique, Collisionless Shock Waves

D. Biskamp and H. Welter

Phys. Rev. Lett. 28, 410 (1972) - Published 14 February, 1972

Phonon Interference in Thin Helium Films Using Superconducting Tunnel Junctions

B. L. Blackford

Phys. Rev. Lett. 28, 414 (1972) - Published 14 February, 1972

Nonlinear Frequency Shift of an Electron Plasma Wave

G. J. Morales and T. M. O'Neil

Phys. Rev. Lett. 28, 417 (1972) - Published 14 February, 1972

Magnetic Pressure of Solid ${}^{3}{He}$

L. I. Zane

Phys. Rev. Lett. 28, 420 (1972) - Published 14 February, 1972

Effect of an External Circuit on Anomalous Resistivity in Plasmas

Katsunobu Nishihara and Akira Hasegawa

Phys. Rev. Lett. 28, 424 (1972) - Published 14 February, 1972

Solids

Explanation of the Low-Temperature, High-Frequency Residual Surface Resistance of Superconductors

C. Passow

Phys. Rev. Lett. 28, 427 (1972) - Published 14 February, 1972

Pseudoresonances in the Magnetophonon Structure of Nondegenerate Semiconductors

Robert L. Peterson

Phys. Rev. Lett. 28, 431 (1972) - Published 14 February, 1972

Reinterpretation of Wavelength-Modulated Absorption in SrTi $O_{3}$ without Coexisting Phases

David Redfield and William J. Burke

Phys. Rev. Lett. 28, 435 (1972) - Published 14 February, 1972

Hot Excitons in Highly Excited CdS

R. F. Leheny, R. E. Nahory, and K. L. Shaklee

Phys. Rev. Lett. 28, 437 (1972) - Published 14 February, 1972

Cyclotron Resonance in Magnesium in the Field-Normal Geometry

R. E. Powell and T. G. Eck

Phys. Rev. Lett. 28, 440 (1972) - Published 14 February, 1972

Nonhydrogenic Exciton and Energy Gap of GaAs

D. Bimberg and W. Schairer

Phys. Rev. Lett. 28, 442 (1972) - Published 14 February, 1972

Calculation of Local Effective Fields: Optical Spectrum of Diamond

J. A. Van Vechten and Richard M. Martin

Phys. Rev. Lett. 28, 446 (1972) - Published 14 February, 1972

Magnetic Tricritical Points in Ising Antiferromagnets

D. P. Landau

Phys. Rev. Lett. 28, 449 (1972) - Published 14 February, 1972

Elementary Particles and Fields

Transcendence of the Law of Baryon-Number Conservation in Black-Hole Physics

Jacob D. Bekenstein

Phys. Rev. Lett. 28, 452 (1972) - Published 14 February, 1972

Energy Straggling and Radiation Reaction for Magnetic Bremsstrahlung

C. S. Shen and D. White

Phys. Rev. Lett. 28, 455 (1972) - Published 14 February, 1972

Inclusive $N$ -Body Reaction in Nucleon-Nucleon Interactions at Ultrahigh Energies

P. L. Jain and Z. Ahmad

Phys. Rev. Lett. 28, 459 (1972) - Published 14 February, 1972

Scaling of Wyler's Expression for $α$

Robert Gilmore

Phys. Rev. Lett. 28, 462 (1972) - Published 14 February, 1972

Physical Review Letters