Physical Review Letters

Multiphoton Magneto-Optical Resonance in PbTe and InSb

K. J. Button, Benjamin Lax, Margaret H. Weiler, and M. Reine

Phys. Rev. Lett. 17, 1005 (1966) - Published 7 November, 1966

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Temperature and Stress Dependence of Electron Lifetime in $p$ -Type Semiconductors Between 1.5 and 4.2°K

Eizo Otsuka, Kazuo Murase, and Tyuzi Ohyama

Phys. Rev. Lett. 17, 1007 (1966) - Published 7 November, 1966

Energy Transfer from $F$ to $M$ Centers in KCl

Irwin Schneider

Phys. Rev. Lett. 17, 1009 (1966) - Published 7 November, 1966

Optical Nonlinearities due to Mobile Carriers in Semiconductors

C. K. N. Patel, R. E. Slusher, and P. A. Fleury

Phys. Rev. Lett. 17, 1011 (1966) - Published 7 November, 1966

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Optical nonlinearities due to conduction-band electrons have been observed in InAs, InSb, GaAs, and PbTe using 10.6-μ ( $ω_{1}$ ) and 9.6-μ ( $ω_{2}$ ) radiation from a $Q$ -switched C $O_{2}$ laser. Difference frequencies $ω_{3} = 2 ω_{1} - ω_{2}$ at 11.8 μ and $ω_{4} = 2 ω_{2} - ω_{1}$ at 8.7 μ were measured for a variety of carrier concentrations at several temperatures.

Theory of Optical Mixing by Mobile Carriers in Semiconductors

P. A. Wolff and Gary A. Pearson

Phys. Rev. Lett. 17, 1015 (1966) - Published 7 November, 1966

Isospin Mixing in Deuteron Reactions

Richard J. Drachman

Phys. Rev. Lett. 17, 1017 (1966) - Published 7 November, 1966

SU(3) Assignment and Coupling of $N^{*} (1688)$

C. A. Heusch, C. Y. Prescott, and R. F. Dashen

Phys. Rev. Lett. 17, 1019 (1966) - Published 7 November, 1966

Eight Ways of Determining the $ρ$ -Meson Coupling Constant

J. J. Sakurai

Phys. Rev. Lett. 17, 1021 (1966) - Published 7 November, 1966

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Some Remarks on the Field Theory for Higher Spin

Shau-jin Chang

Phys. Rev. Lett. 17, 1024 (1966) - Published 7 November, 1966

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The field theory for higher spin proposed by Tung is examined. It is shown for $S >~ \frac{3}{2}$ that this theory describes a system which is the superposition of two spin- $S$ fields with opposite parities. The energy of this system is no longer positive definite. Possible alternations of the theory are discussed.

Photoproduction of Single Positive Pions Between 1.2 and 3 GeV

G. Buschhorn, J. Carroll, R. D. Eandi, P. Heide, R. Hübner, W. Kern, U. Kötz, P. Schmüser, and H. J. Skronn

Phys. Rev. Lett. 17, 1027 (1966) - Published 7 November, 1966

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High-Energy Proton-Nucleus Scattering at Small Angles

Olav Benestad and Haakon Olsen

Phys. Rev. Lett. 17, 1031 (1966) - Published 7 November, 1966

Sign of the Proton-Neutron Mass Difference and a Ghost Scalar Meson

Mahiko Suzuki and Fredrik Zachariasen

Phys. Rev. Lett. 17, 1033 (1966) - Published 7 November, 1966

Direct Electron Excitation Cross Sections Pertinent to the Argon Ion Laser

W. R. Bennett, Jr., G. N. Mercer, P. J. Kindlmann, B. Wexler, and H. Hyman

Phys. Rev. Lett. 17, 987 (1966) - Published 7 November, 1966

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Absolute direct excitation cross sections from the neutral ground state have been measured for upper levels of the strongest laser transitions in Ar II to within errors of ≈20%. Reasonable agreement is obtained with calculated values of these cross sections based on the "sudden" approximation made by Koozekanani with Hartree-Fock wave functions and intermediate coupling.

Line Profile in the One-Electron Approximation

J. Cooper

Phys. Rev. Lett. 17, 991 (1966) - Published 7 November, 1966

Propagation of Ion-Acoustic Solitary Waves of Small Amplitude

Haruichi Washimi and Tosiya Taniuti

Phys. Rev. Lett. 17, 996 (1966) - Published 7 November, 1966

Potentiometer for Studying the Liquid He II Film

W. E. Keller and E. F. Hammel

Phys. Rev. Lett. 17, 998 (1966) - Published 7 November, 1966

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A simple level-sensing device is described for probing the profile of the chemical potential along the flowing liquid He II film. Measurements with these probes indicate that dissipation in the flowing film may occur either at highly localized regions or over extended regions of the flow path, depending upon experimental variations. Also it is shown that changes in transfer rate occurring during a given flow process are accompanied by a redistribution of the sites producing dissipation.

Light Modulation at the Ground-State Hyperfine-Separation Frequency of Potassium

Arthur H. Firester and Thomas R. Carver

Phys. Rev. Lett. 17, 947 (1966) - Published 31 October, 1966

Relaxation Phenomena in Mössbauer Spectra of Magnetically Ordered Erbium Ions in ErFe $O_{3}$

I. Nowik and H. H. Wickman

Phys. Rev. Lett. 17, 949 (1966) - Published 31 October, 1966

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Effective Long-Wavelength Interaction of ${He}^{3}$ Atoms Dissolved in Superfluid ${He}^{4}$

Gordon Baym

Phys. Rev. Lett. 17, 952 (1966) - Published 31 October, 1966

Oscillatory Magnetostriction in $n$ -Gallium Antimonide

B. S. Chandrasekhar, J. H. Condon, E. Fawcett, and W. M. Becker

Phys. Rev. Lett. 17, 954 (1966) - Published 31 October, 1966

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Multiphoton Magneto-Optical Resonance in PbTe and InSb

Temperature and Stress Dependence of Electron Lifetime in $p$ -Type Semiconductors Between 1.5 and 4.2°K

Energy Transfer from $F$ to $M$ Centers in KCl

Optical Nonlinearities due to Mobile Carriers in Semiconductors

Theory of Optical Mixing by Mobile Carriers in Semiconductors

Isospin Mixing in Deuteron Reactions

SU(3) Assignment and Coupling of $N^{*} (1688)$

Eight Ways of Determining the $ρ$ -Meson Coupling Constant

Some Remarks on the Field Theory for Higher Spin

Photoproduction of Single Positive Pions Between 1.2 and 3 GeV

High-Energy Proton-Nucleus Scattering at Small Angles

Sign of the Proton-Neutron Mass Difference and a Ghost Scalar Meson

Direct Electron Excitation Cross Sections Pertinent to the Argon Ion Laser

Line Profile in the One-Electron Approximation

Propagation of Ion-Acoustic Solitary Waves of Small Amplitude

Potentiometer for Studying the Liquid He II Film

Light Modulation at the Ground-State Hyperfine-Separation Frequency of Potassium

Relaxation Phenomena in Mössbauer Spectra of Magnetically Ordered Erbium Ions in ErFe $O_{3}$

Effective Long-Wavelength Interaction of ${He}^{3}$ Atoms Dissolved in Superfluid ${He}^{4}$

Oscillatory Magnetostriction in $n$ -Gallium Antimonide

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