ANNOUNCEMENT

Phys. Rev. Lett. 21, 59 (1968) – Published 8 July 1968

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Level-Crossing Signal Line Shapes and Ordering of Energy Levels

H. H. Stroke, G. Fulop, S. Klepner, and O. Redi

Phys. Rev. Lett. 21, 61 (1968) – Published 8 July 1968

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$Q$ structure and Inner-Shell Vacancies in Neon-Neon and Krypton-Krypton Collisions

Michael P. McCaughey, Emile J. Knystautas, Howard C. Hayden, and Edgar Everhart

Phys. Rev. Lett. 21, 65 (1968) – Published 8 July 1968

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Generation and Trapping of Charged Species in Rare-Gas Matrix at 4°K: esr spectra of ${\mathrm{Cd}}^{+}$, ${\mathrm{Cr}}^{+}$, and ${\mathrm{Mn}}^{+}$

Paul H. Kasai

Phys. Rev. Lett. 21, 67 (1968) – Published 8 July 1968

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Optical Excitation Effects in the Proton nmr Spin-Lattice Relaxation Time in Anthracene

P. R. Moran and W. M. Yen

Phys. Rev. Lett. 21, 70 (1968) – Published 8 July 1968

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Ejection of Electrons from Superfluid Helium Surface by Annihilation of Quantized Vortex Rings

S. Cunsolo, G. Dall'Oglio, B. Maraviglia, and M. V. Ricci

Phys. Rev. Lett. 21, 74 (1968) – Published 8 July 1968

Bernoulli Potentials in Superconductors

C. J. Adkins and J. R. Waldram

Phys. Rev. Lett. 21, 76 (1968) – Published 8 July 1968

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Thermal-Conductivity Measurements of the Proximity Effect

G. Deutscher, P. Lindenfeld, and R. D. McConnell

Phys. Rev. Lett. 21, 79 (1968) – Published 8 July 1968

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Magnetic Breakdown and Thermoelectricity in Metallic Tin

John A. Woollam and P. A. Schroeder

Phys. Rev. Lett. 21, 81 (1968) – Published 8 July 1968

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Microwave Acoustic Amplification in $n-\mathrm{InSb}$ at 9 GHz

K. W. Nill

Phys. Rev. Lett. 21, 82 (1968) – Published 8 July 1968

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Resonant Excitation of Plasmons in Thin Films by Elecromagnetic Waves

Andrew R. Melnyk and Michael J. Harrison

Phys. Rev. Lett. 21, 85 (1968) – Published 8 July 1968

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Angular-Correlation Functions of Diatomic Rotators in Alkali Halides

B. Keller and F. K. Kneubühl

Phys. Rev. Lett. 21, 88 (1968) – Published 8 July 1968

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Dynamics of Excited-State Annihilation in Nd${\mathrm{Cl}}_3$

W. D. Partlow

Phys. Rev. Lett. 21, 90 (1968) – Published 8 July 1968

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rf-Induced Sidebands in Mössbauer Spectra

Neil D. Heiman, Loren Pfeiffer, and J. C. Walker

Phys. Rev. Lett. 21, 93 (1968) – Published 8 July 1968

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Optical Constants of Sodium and Potassium from 0.5 to 4.0 eV

Neville V. Smith

Phys. Rev. Lett. 21, 96 (1968) – Published 8 July 1968

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Critical Behavior of Iron Above its Curie Temperature

M. F. Collins, R. Nathans, L. Passell, and G. Shirane

Phys. Rev. Lett. 21, 99 (1968) – Published 8 July 1968

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Two-Quasiparticle $1^{+}$ States in Even-$A$ Single-Closed-Shell Nuclei

R. J. Lombard

Phys. Rev. Lett. 21, 102 (1968) – Published 8 July 1968

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On the Measurement of Differences Between the Gravitationally Induced Electric Fields Near Various Metals

F. Curtis Michel

Phys. Rev. Lett. 21, 104 (1968) – Published 8 July 1968

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New Foundation of General Relativity

Eugene Guth

Phys. Rev. Lett. 21, 106 (1968) – Published 8 July 1968

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Properties of High-Density Matter in Intense Magnetic Fields

Hong-Yee Chiu and Vittorio Canuto

Phys. Rev. Lett. 21, 110 (1968) – Published 8 July 1968

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Mass Spectrum for ${\pi }^{-}{\pi }^{-}{\pi }^{+}$ Produced in ${\pi }^{-}p$ at BeV/c

G. Ascoli, H. B. Crawley, U. Kruse, D. W. Mortara, E. Schafer, A. Shapiro, and B. Terreault

Phys. Rev. Lett. 21, 113 (1968) – Published 8 July 1968

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Current-Algebra, Subtracted Dispersion Relation, and $K_{l3\mathrm{}}$ form Factors

H. T. Nieh

Phys. Rev. Lett. 21, 116 (1968) – Published 8 July 1968

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Exchange Degeneracy and Backward Superconvergence in $N\overline{N}$ Scattering

D. P. Roy

Phys. Rev. Lett. 21, 119 (1968) – Published 8 July 1968

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Chiral Symmetry Breaking in $K_{l3\mathrm{}}$ Decays

Lay Nam Chang and Y. C. Leung

Phys. Rev. Lett. 21, 122 (1968) – Published 8 July 1968

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Study of $A_2^{}{}_{}{}^{-}$ in ${\pi }^{-}p\to {\pi }^{-}p{\eta }^0$ at 5 BeV/c.

G. Ascoli, H. B. Crawley, D. W. Mortara, A. Shapiro, C. A. Bridges, B. I. Eisenstein, U. E. Kruse, E. D. Schafer, and B. Terreault

Phys. Rev. Lett. 21, 126 (1968) – Published 8 July 1968

Lifetime of the $2{}_{}{}^1{}_{}{}^{}P$ State of He.

W. L. Williams and E. S. Fry

Phys. Rev. Lett. 21, 126 (1968) – Published 8 July 1968

Spin-Parity Analysis of the $B$ Meson.

G. Ascoli, H. B. Crawley, D. W. Mortara, and A. Shapiro

Phys. Rev. Lett. 21, 126 (1968) – Published 8 July 1968