Volume 67, Issue 26

23 December 1991

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LETTERS

General Physics

Metamorphosis of a Cantor spectrum due to classical chaos

T. Geisel, R. Ketzmerick, and G. Petschel

Phys. Rev. Lett. 67, 3635 (1991) - Published 23 December, 1991

Gravitation and Astrophysics

Is there a big-bubble problem in extended inflation?

Dalia S. Goldwirth and Helmut W. Zaglauer

Phys. Rev. Lett. 67, 3639 (1991) - Published 23 December, 1991

Elementary Particles and Fields

Alice strings, magnetic monopoles, and charge quantization

Lee Brekke, Willy Fischler, and Tom D. Imbo

Phys. Rev. Lett. 67, 3643 (1991) - Published 23 December, 1991

Three-dimensional gravity and string ghosts

S. Carlip and I. I. Kogan

Phys. Rev. Lett. 67, 3647 (1991) - Published 23 December, 1991

High-energy production of scalar bosons in weak-coupling theories

V. I. Zakharov

Phys. Rev. Lett. 67, 3650 (1991) - Published 23 December, 1991

Nuclear Physics

$β^{+}$ decays of ${}^{37}{Ca}$ : Implications for the efficiency of the ${}^{37}{Cl}$ solar ν detector

A. Garca, E. G. Adelberger, P. V. Magnus, H. E. Swanson, O. Tengblad, ISOLDE Collaboration, and D. M. Molz

Phys. Rev. Lett. 67, 3654 (1991) - Published 23 December, 1991

Is the weak axial-vector current renormalized in nuclei?

E. G. Adelberger, A. Garca, P. V. Magnus, and D. P. Wells

Phys. Rev. Lett. 67, 3658 (1991) - Published 23 December, 1991

Discovery of neutron-rich Co and Fe isotopes in ${}^{239}{Pu}$ ( $n_{th}$ ,f): Yields and half-lives

M. Bernas, P. Armbruster, S. Czajkowski, H. Faust, J. P. Bocquet, and R. Brissot

Phys. Rev. Lett. 67, 3661 (1991) - Published 23 December, 1991

Atomic, Molecular, and Optical Physics

Exact quantum-statistical dynamics of an oscillator with time-dependent frequency and generation of nonclassical states

G. S. Agarwal and S. Arun Kumar

Phys. Rev. Lett. 67, 3665 (1991) - Published 23 December, 1991

Observation of laser-induced continuum structure in ionization of sodium

Y. L. Shao, D. Charalambidis, C. Fotakis, Jian Zhang, and P. Lambropoulos

Phys. Rev. Lett. 67, 3669 (1991) - Published 23 December, 1991

Observation of a laser-induced resonance in the photoionization spectrum of sodium

S. Cavalieri, F. S. Pavone, and M. Matera

Phys. Rev. Lett. 67, 3673 (1991) - Published 23 December, 1991

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Defect dynamics in viscous fingering

J. Casademunt and David Jasnow

Phys. Rev. Lett. 67, 3677 (1991) - Published 23 December, 1991

Plasma and Beam Physics

Unified theory of resonant excitation of kinetic ballooning modes by energetic ions and alpha particles in tokamaks

H. Biglari and L. Chen

Phys. Rev. Lett. 67, 3681 (1991) - Published 23 December, 1991

Cyclotron resonance in a pure electron plasma column

Roy W. Gould and Michael A. LaPointe

Phys. Rev. Lett. 67, 3685 (1991) - Published 23 December, 1991

Condensed Matter: Structure, Etc.

Muonium fluorescence: Anomalous muonium center and relaxed excited state in KBr

R. Kadono, A. Matsushita, and K. Nagamine

Phys. Rev. Lett. 67, 3689 (1991) - Published 23 December, 1991

First-principles simulation of intrinsic collision cascades in KCl and NaCl to test interatomic potentials at energies between 5 and 350 eV

J. Keinonen, A. Kuronen, P. Tikkanen, H. G. Börner, J. Jolie, S. Ulbig, E. G. Kessler, R. M. Nieminen, M. J. Puska, and A. P. Seitsonen

Phys. Rev. Lett. 67, 3692 (1991) - Published 23 December, 1991

Morphological instability in epitaxially strained dislocation-free solid films

B. J. Spencer, P. W. Voorhees, and S. H. Davis

Phys. Rev. Lett. 67, 3696 (1991) - Published 23 December, 1991

Condensed Matter: Electronic Properties, Etc.

Ultrafast Raman echoes in liquid acetonitrile

D. Vanden Bout, L. J. Muller, and M. Berg

Phys. Rev. Lett. 67, 3700 (1991) - Published 23 December, 1991

Experiments on tunneling and correlations

E. Y. Andrei, S. Yücel, and L. Menna

Phys. Rev. Lett. 67, 3704 (1991) - Published 23 December, 1991

Observation of the forbidden second-harmonic generation in resonance with 2P Wannier exciton in ZnSe thin films

Fujio Minami, Kuon Inoue, Yukio Kato, Kouji Yoshida, and Koh Era

Phys. Rev. Lett. 67, 3708 (1991) - Published 23 December, 1991

Commensurate fine structure in angular-dependent studies of (TMTSF $)_{2}$ ${ClO}_{4}$

M. J. Naughton, O. H. Chung, M. Chaparala, X. Bu, and P. Coppens

Phys. Rev. Lett. 67, 3712 (1991) - Published 23 December, 1991

Direct observation of the Haldane gap in NENP by far-infrared spectroscopy in high magnetic fields

W. Lu, J. Tuchendler, M. von Ortenberg, and J. P. Renard

Phys. Rev. Lett. 67, 3716 (1991) - Published 23 December, 1991

Probing the Kondo resonance by resonant tunneling through an Anderson impurity

Selman Hershfield, John H. Davies, and John W. Wilkins

Phys. Rev. Lett. 67, 3720 (1991) - Published 23 December, 1991

Resistivity and thermopower of heavy-fermion systems

H. Schweitzer and G. Czycholl

Phys. Rev. Lett. 67, 3724 (1991) - Published 23 December, 1991

Optically induced metastability in untwinned single-domain ${YBa}_{2}$ ${Cu}_{3}$ $O_{7}$

D. R. Wake, F. Slakey, M. V. Klein, J. P. Rice, and D. M. Ginsberg

Phys. Rev. Lett. 67, 3728 (1991) - Published 23 December, 1991

ERRATA

Superconducting Double Transition in a Heavy-Fermion Material U ${Pt}_{3}$

Kazushige Machida and Masa-aki Ozaki

Phys. Rev. Lett. 67, 3732 (1991) - Published 23 December, 1991

Asymptotic Estimate of the $n$ -Loop QCD Contribution to the Total $e^{+} e^{-}$ Annihilation Cross Section

Geoffrey B. West

Phys. Rev. Lett. 67, 3732 (1991) - Published 23 December, 1991

Tunneling and Superconductivity of Strongly Repulsive Electrons

Frédéric Mila and Elihu Abrahams

Phys. Rev. Lett. 67, 3732 (1991) - Published 23 December, 1991

Quantum Irreversibility and Chaos

Luca Bonci, Roberto Roncaglia, Bruce J. West, and Paolo Grigolini

Phys. Rev. Lett. 67, 3733 (1991) - Published 23 December, 1991

Observation of Electromagnetically Induced Transparency in Collisionally Broadened Lead Vapor

J. E. Field, K. H. Hahn, and S. E. Harris

Phys. Rev. Lett. 67, 3733 (1991) - Published 23 December, 1991