Volume 56, Issue 4

E. K. Hulet, J. F. Wild, R. J. Dougan, R. W. Lougheed, J. H. Landrum, A. D. Dougan, M. Schadel, R. L. Hahn, P. A. Baisden, C. M. Henderson, R. J. Dupzyk, K. Sümmerer, and G. R. Bethune

Phys. Rev. Lett. 56, 313 (1986) - Published 27 January, 1986

Asymptotic normalization constants for ${}^{3}{\to n + d}$ and triton binding energy

S. Ishikawa and T. Sasakawa

Phys. Rev. Lett. 56, 317 (1986) - Published 27 January, 1986

Atomic, Molecular, and Optical Physics

‘‘Heisenberg core’’ in classical-trajectory Monte Carlo calculations of ionization and charge exchange

D. Zajfman and D. Maor

Phys. Rev. Lett. 56, 320 (1986) - Published 27 January, 1986

van der Waals force between positronium and hydrogenic atoms: Finite-mass corrections

C. K. Au and Richard J. Drachman

Phys. Rev. Lett. 56, 324 (1986) - Published 27 January, 1986

Rydberg spectroscopy of $H_{2}$ via stepwise resonant two-photon ion-pair ( $H^{+}$ + $H^{-}$ ) production

A. H. Kung, Ralph H. Page, R. J. Larkin, Y. R. Shen, and Yuan T. Lee

Phys. Rev. Lett. 56, 328 (1986) - Published 27 January, 1986

Measurement of Stark amplitudes α,β in the $6^{2}$ $P_{1 / 2}$ → $7^{2}$ $P_{1 / 2}$ transition in atomic thallium

Carol E. Tanner and Eugene D. Commins

Phys. Rev. Lett. 56, 332 (1986) - Published 27 January, 1986

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Radial viscous fingers and diffusion-limited aggregation: Fractal dimension and growth sites

Gérard Daccord, Johann Nittmann, and H. Eugene Stanley

Phys. Rev. Lett. 56, 336 (1986) - Published 27 January, 1986

Plasma and Beam Physics

Nonthermal electron velocity distribution measured by electron cyclotron emission in Alcator C tokamak

K. Kato and I. H. Hutchinson

Phys. Rev. Lett. 56, 340 (1986) - Published 27 January, 1986

Virtual-cathode oscillator emission by a pinched diode

J. Benford, H. Sze, W. Woo, and B. Harteneck

Phys. Rev. Lett. 56, 344 (1986) - Published 27 January, 1986

Condensed Matter: Structure, Etc.

Direct observation of critical phenomena by incoherent neutron scattering

B. Toudic, H. Cailleau, R. E. Lechner, and W. Petry

Phys. Rev. Lett. 56, 347 (1986) - Published 27 January, 1986

Path-integral computation of the low-temperature properties of liquid ${}^{4}{He}$

D. M. Ceperley and E. L. Pollock

Phys. Rev. Lett. 56, 351 (1986) - Published 27 January, 1986

Preservation of a 7×7 periodicity at a buried amorphous Si/Si(111) interface

J. M. Gibson, H.-J. Gossmann, J. C. Bean, R. T. Tung, and L. C. Feldman

Phys. Rev. Lett. 56, 355 (1986) - Published 27 January, 1986

Identification of vortices in superfluid ${}^{3}B$

E. V. Thuneberg

Phys. Rev. Lett. 56, 359 (1986) - Published 27 January, 1986

Vortices with spontaneously broken axisymmetry in ${}^{3}B$

M. M. Salomaa and G. E. Volovik

Phys. Rev. Lett. 56, 363 (1986) - Published 27 January, 1986

Condensed Matter: Electronic Properties, Etc.

Metastable angular distributions from electron-stimulated desorption

Mark D. Alvey, Miles J. Dresser, and John T. Yates, Jr.

Phys. Rev. Lett. 56, 367 (1986) - Published 27 January, 1986

Experimental evidence for the Haldane gap in a spin-1 nearly isotropic, antiferromagnetic chain

W. J. L Buyers, R. M. Morra, R. L. Armstrong, M. J. Hogan, P. Gerlach, and and K. Hirakawa

Phys. Rev. Lett. 56, 371 (1986) - Published 27 January, 1986

Observation of a true interface state in strained-layer Cu adsorption on Ru(0001)

J. E. Houston, C. H. F. Peden, Peter J. Feibelman, and D. R. Hamann

Phys. Rev. Lett. 56, 375 (1986) - Published 27 January, 1986

Global phase coherence in two-dimensional granular superconductors

B. G. Orr, H. M. Jaeger, A. M. Goldman, and C. G. Kuper

Phys. Rev. Lett. 56, 378 (1986) - Published 27 January, 1986

Heat capacity of a condensed electron system in the dilute metal n- ${Hg}_{0.8}$ ${Cd}_{0.2}$ Te

J. P. Stadler and G. Nimtz

Phys. Rev. Lett. 56, 382 (1986) - Published 27 January, 1986

Direct observation of ensemble averaging of the Aharonov-Bohm effect in normal-metal loops

C. P. Umbach, C. Van Haesendonck, R. B. Laibowitz, S. Washburn, and R. A. Webb

Phys. Rev. Lett. 56, 386 (1986) - Published 27 January, 1986

Pressure dependence of the low-temperature specific heat of the heavy-fermion compound ${CeAl}_{3}$

G. E. Brodale, R. A. Fisher, Norman E. Phillips, and J. Floquet

Phys. Rev. Lett. 56, 390 (1986) - Published 27 January, 1986

Cross-Disciplinary Physics

Low-frequency modes in proteins: Use of the effective-medium approximation to interpret the fractal dimension observed in electron-spin relaxation measurements

R. Elber and M. Karplus

Phys. Rev. Lett. 56, 394 (1986) - Published 27 January, 1986

COMMENTS

Comment on ‘‘Evidence for a nucleon-nucleus spin-spin interaction in ${}^{9}’$

S. Raman and J. E. Lynn

Phys. Rev. Lett. 56, 398 (1986) - Published 27 January, 1986

Mughabghab responds

S. F. Mughabghab

Phys. Rev. Lett. 56, 399 (1986) - Published 27 January, 1986

Comment on ‘‘Quantization of asymmetric shapes in nuclei’’

O. Castaos, A. Frank, P. O. Hess, and H. Ogura

Phys. Rev. Lett. 56, 400 (1986) - Published 27 January, 1986

Comment on ‘‘Photoelectron angular distributions for near-threshold two-photon ionization of cesium and rubidium atoms’’

P. Lambropoulos and X. Tang

Phys. Rev. Lett. 56, 401 (1986) - Published 27 January, 1986

Hydrogen-acceptor pairs in silicon

Gary G. DeLeo and W. Beall Fowler

Phys. Rev. Lett. 56, 402 (1986) - Published 27 January, 1986

Assali and Leite respond

L. V. C. Assali and J. R. Leite

Phys. Rev. Lett. 56, 403 (1986) - Published 27 January, 1986

ERRATA

Erratum: Effective-action expansion in perturbation theory [Phys. Rev. Lett. 54, 1222 (1985)]

Lai-Him Chan

Phys. Rev. Lett. 56, 404 (1986) - Published 27 January, 1986

Lifetime Enhancement of Two-Dimensional Excitons by the Quantum-Confined Stark Effect

H. -J. Polland, L. Schultheis, J. Kuhl, E. O. Göbel, and C. W. Tu

Phys. Rev. Lett. 56, 404 (1986) - Published 27 January, 1986