Volume 42, Issue 4

22 January 1979

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LETTERS

Elementary Particles and Fields

Observation of the Kaonic Decay of the ${Λ_{c}}^{+}$ Charmed Baryon

A. M. Cnops, P. L. Connolly, S. A. Kahn, H. G. Kirk, M. J. Murtagh, R. B. Palmer, N. P. Samios, and M. Tanaka

Phys. Rev. Lett. 42, 197 (1979) - Published 22 January, 1979

Solitons of Coupled Scalar Field Theories in Two Dimensions

R. Rajaraman

Phys. Rev. Lett. 42, 200 (1979) - Published 22 January, 1979

Coherent Production on Nuclei Does Not Measure Total Cross Sections for Unstable Particles

Hannu I. Miettinen and Jon Pumplin

Phys. Rev. Lett. 42, 204 (1979) - Published 22 January, 1979

Exclusive $ρ$ Production by Virtual Photons

L. A. Ahrens, K. Berkelman, D. G. Cassel, C. T. Day, B. G. Gibbard, D. J. Harding, D. L. Hartill, J. W. Humphrey, T. J. Killian, J. S. Klinger, J. T. Linnemann, E. A. Treadwell, and D. H. White

Phys. Rev. Lett. 42, 208 (1979) - Published 22 January, 1979

Nuclei

Reactive Content of the First-Order Optical Potential

Daniel S. Koltun and David M. Schneider

Phys. Rev. Lett. 42, 211 (1979) - Published 22 January, 1979

From Heavy-Ion Elastic Scattering to Fission: A Unified Potential for the Description of Large-Scale Nuclear Collective Motion

H. J. Krappe, J. R. Nix, and A. J. Sierk

Phys. Rev. Lett. 42, 215 (1979) - Published 22 January, 1979

Remeasurement of ${}^{40}{Ar}$ and ${}^{84}{Kr}$ Excitation Functions Leading to the Same Compound Nucleus, ${}^{158}{Er}$

R. L. Hahn, K. S. Toth, C. Cabot, H. Gauvin, and Y. LeBeyec

Phys. Rev. Lett. 42, 218 (1979) - Published 22 January, 1979

Parity of Bound $J = 1$ Levels in ${}^{208}{Pb}$

A. M. Nathan, R. Starr, R. M. Laszewki, and P. Axel

Phys. Rev. Lett. 42, 221 (1979) - Published 22 January, 1979

Classical Phenomenology and Applications

Direct Measurement of the Effective Initial Tipping Angle in Superfluorescence

Q. H. F. Vrehen and M. F. H. Schuurmans

Phys. Rev. Lett. 42, 224 (1979) - Published 22 January, 1979

Fluids, Plasmas, and Electric Discharges

Observation and Interpretation of Magnetic-Field-Line Reconnection and Tearing in a Theta Pinch

J. H. Irby, J. F. Drake, and Hans R. Griem

Phys. Rev. Lett. 42, 228 (1979) - Published 22 January, 1979

Compression Measurements of Neon-Seeded Glass Microballoons Irradiated by C $O_{2}$ -Laser Light

Kenneth B. Mitchell, David B. vanHusteyn, Gene H. McCall, Ping Lee, and Hans R. Griem

Phys. Rev. Lett. 42, 232 (1979) - Published 22 January, 1979

Time-Resolved High-Energy X-Ray Spectra of Laser-Irradiated Targets

Peter Hoong-Yee Lee and Mordecai David Rosen

Phys. Rev. Lett. 42, 236 (1979) - Published 22 January, 1979

Double-Diffusion Hot-Electron Transport in Self-Consistent $E$ and $B$ Fields

R. J. Mason

Phys. Rev. Lett. 42, 239 (1979) - Published 22 January, 1979

Condensed Matter: Structure, Etc.

Precipitous Onset for Superfluidity in ${}^{3}{He}$ - ${}^{4}{He}$ Mixtures

Emilia Webster, Grant Webster, and Marvin Chester

Phys. Rev. Lett. 42, 243 (1979) - Published 22 January, 1979

Reconstruction of the W (001) Surface and Its Reordering by Hydrogen Adsorption, Studied by MeV Ion Scattering

I. Stensgaard, L. C. Feldman, and P. J. Silverman

Phys. Rev. Lett. 42, 247 (1979) - Published 22 January, 1979

Saturation of the 9.4-GHz Hypersonic Attenuation in Fast-Neutron-Irradiated Crystalline Quartz

Christiane Laermans

Phys. Rev. Lett. 42, 250 (1979) - Published 22 January, 1979

Spectra of Ternary Alloys

Charles W. Myles and John D. Dow

Phys. Rev. Lett. 42, 254 (1979) - Published 22 January, 1979

Condensed Matter: Electronic Properties, Etc.

Direct Macroscopic Observation of Antiferromagnetic Order in Zero Applied Field

C. N. Guy, J. O. Strom-Olsen, and R. W. Cochrane

Phys. Rev. Lett. 42, 257 (1979) - Published 22 January, 1979

Magnetic Excitations in Uranium Antimonide

G. H. Lander, W. G. Stirling, and O. Vogt

Phys. Rev. Lett. 42, 260 (1979) - Published 22 January, 1979

Two Types of Indirect-Exciton Ground States in Trigonal Selenium

B. Moreth

Phys. Rev. Lett. 42, 264 (1979) - Published 22 January, 1979

Discovery of the Immobility of Electron-Hole Drops in Ge at Low Excitation

R. M. Westervelt, J. C. Culbertson, and B. S. Black

Phys. Rev. Lett. 42, 267 (1979) - Published 22 January, 1979

Measurement of Characteristic Time Constants of Microwave-Enhanced Superconductivity in Aluminum Films

J. A. Pals and J. Dobben

Phys. Rev. Lett. 42, 270 (1979) - Published 22 January, 1979

Oxidation-Induced Breakdown of the Conservation of Perpendicular Momentum in the Angle-Resolved Photoelectron Spectra of Cu(111)

M. Sagurton, D. Liebowitz, and N. J. Shevchik

Phys. Rev. Lett. 42, 274 (1979) - Published 22 January, 1979

Spontaneous Magnetization in a Mixed-Valent Rare-Earth Compound

B. Batlogg, H. R. Ott, and P. Wachter

Phys. Rev. Lett. 42, 278 (1979) - Published 22 January, 1979

ERRATA

Light Scattering as a Probe of Dynamical Critical Properties of Antiferromagnets

J. W. Halley

Phys. Rev. Lett. 42, 282 (1979) - Published 22 January, 1979

Physical Review Letters