Volume 61, Issue 10

S. N. Dancer, I. J. D. MacGregor, J. R. M. Annand, I. Anthony, G. I. Crawford, S. J. Hall, J. D. Kellie, J. C. McGeorge, R. O. Owens, P. A. Wallace, D. Branford, S. V. Springham, A. C. Shotter, B. Schoch, J. M. Vogt, R. Beck, and G. Liesenfeld

Phys. Rev. Lett. 61, 1170 (1988) - Published 5 September, 1988

Spin-Dependent Observables for the ${}^{12}C (p, p^{'} γ)$ Reaction at 400 MeV

K. H. Hicks, R. Abegg, A. Celler, O. Häusser, R. S. Henderson, N. W. Hill, K. P. Jackson, R. G. Jeppesen, N. S. P. King, M. A. Kovash, R. Liljestrand, C. A. Miller, G. L. Morgan, J. R. Shepard, A. Trudel, M. Vetterli, and S. Yen

Phys. Rev. Lett. 61, 1174 (1988) - Published 5 September, 1988

Neutron-Emission Spectra and Superdeformation in Light Nuclei

J. J. Kolata, R. A. Kryger, P. A. DeYoung, and F. W. Prosser

Phys. Rev. Lett. 61, 1178 (1988) - Published 5 September, 1988

Atomic, Molecular, and Optical Physics

High-Intensity Kapitza-Dirac Effect

P. H. Bucksbaum, D. W. Schumacher, and M. Bashkansky

Phys. Rev. Lett. 61, 1182 (1988) - Published 5 September, 1988

Observations of Two-Electron-Jump, Core-Changing X-Ray Transitions in Fluorinelike and Oxygenlike Lanthanum

G. A. Chandler, D. D. Dietrich, M. H. Chen, R. J. Fortner, C. J. Hailey, and R. E. Stewart

Phys. Rev. Lett. 61, 1186 (1988) - Published 5 September, 1988

Rigid-Fluid Transition in Specific-Size Argon Clusters

Mee Y. Hahn and Robert L. Whetten

Phys. Rev. Lett. 61, 1190 (1988) - Published 5 September, 1988

Negative-Ion Formation on Alkali-Metal Surfaces

Yicheng Wang, M. A. Huels, D. R. Gallagher, L. D. Doverspike, and R. L. Champion

Phys. Rev. Lett. 61, 1194 (1988) - Published 5 September, 1988

Fundamental Phenomenology and Applications

Competition between Different Symmetries in Convective Patterns

S. Ciliberto, E. Pampaloni, and C. Pérez-García

Phys. Rev. Lett. 61, 1198 (1988) - Published 5 September, 1988

Condensed Matter: Structure, Etc.

Liquid-Crystalline and Helical Order in a Discotic Mesophase

Ernest Fontes, Paul A. Heiney, and Wim H. de Jeu

Phys. Rev. Lett. 61, 1202 (1988) - Published 5 September, 1988

High-Resolution X-Ray Measurements of the $A$ Transition in the Polymeric Liquid Crystal $P 4.1$ Polysiloxane

Edward N. Keller, Rivka Halfon, Ehud Nachaliel, Dan Davidov, and Herbert Zimmermann

Phys. Rev. Lett. 61, 1206 (1988) - Published 5 September, 1988

Measurements of Modulated Lamellar $P_{β^{'}}$ Phases of Interacting Lipid Membranes

Daniel C. Wack and Watt W. Webb

Phys. Rev. Lett. 61, 1210 (1988) - Published 5 September, 1988

Condensed Matter: Electronic Properties, Etc.

Coherent Backscattering of Light in a Quasi-Two-Dimensional System

Isaac Freund, Michael Rosenbluh, Richard Berkovits, and Moshe Kaveh

Phys. Rev. Lett. 61, 1214 (1988) - Published 5 September, 1988

Neutralization of Very-Low-Energy Ions on Pt(100)

Housei Akazawa and Yoshitada Murata

Phys. Rev. Lett. 61, 1218 (1988) - Published 5 September, 1988

Stoner Transitions and Spin-Selective Excitations in bcc Cobalt

Y. U. Idzerda, D. M. Lind, D. A. Papaconstantopoulos, G. A. Prinz, B. T. Jonker, and J. J. Krebs

Phys. Rev. Lett. 61, 1222 (1988) - Published 5 September, 1988

Pulsed Propagation of Polariton Luminescence

M. Kuwata, T. Kuga, H. Akiyama, T. Hirano, and M. Matsuoka

Phys. Rev. Lett. 61, 1226 (1988) - Published 5 September, 1988

Theory of Interband Auger Recombination in $n$ -type Silicon

D. B. Laks, G. F. Neumark, A. Hangleiter, and S. T. Pantelides

Phys. Rev. Lett. 61, 1229 (1988) - Published 5 September, 1988

Second-Harmonic Generation at Simple Metal Surfaces

A. Liebsch

Phys. Rev. Lett. 61, 1233 (1988) - Published 5 September, 1988

New Stability Limit of Electrons Trapped on the Surface of Liquid Helium

Gordon T. Saville, John M. Goodkind, and P. M. Platzman

Phys. Rev. Lett. 61, 1237 (1988) - Published 5 September, 1988

Polarization and Resonance Properties of Magnetic X-Ray Scattering in Holmium

Doon Gibbs, D. R. Harshman, E. D. Isaacs, D. B. McWhan, D. Mills, and C. Vettier

Phys. Rev. Lett. 61, 1241 (1988) - Published 5 September, 1988

X-Ray Resonance Exchange Scattering

J. P. Hannon, G. T. Trammell, M. Blume, and Doon Gibbs

Phys. Rev. Lett. 61, 1245 (1988) - Published 5 September, 1988

Strong Orbital Magnetism and Possible Mixed Valence in $4 d$ Systems

K. D. Gross and D. Riegel

Phys. Rev. Lett. 61, 1249 (1988) - Published 5 September, 1988

Spin-Polarized Tunneling Study of $s - f$ Exchange in Superconductors

J. E. Tkaczyk and P. M. Tedrow

Phys. Rev. Lett. 61, 1253 (1988) - Published 5 September, 1988

COMMENTS

Symmetry and Static Correlation Function of Tilted Hexatic Liquid Crystals

Helmut R. Brand and Harald Pleiner

Phys. Rev. Lett. 61, 1257 (1988) - Published 5 September, 1988

Sprunt and Litster Reply

S. Sprunt and J. D. Litster

Phys. Rev. Lett. 61, 1258 (1988) - Published 5 September, 1988

Josephson Junctions in $Y_{1} {Ba}_{2} {Cu}_{3} O_{x}$

Dana Browne and Baruch Horovitz

Phys. Rev. Lett. 61, 1259 (1988) - Published 5 September, 1988

Dubson et al. Reply

M. A. Dubson, S. T. Herbert, J. J. Calabrese, D. C. Harris, B. R. Patton, and J. C. Garland

Phys. Rev. Lett. 61, 1260 (1988) - Published 5 September, 1988