Recent Articles

Generalized Deck Effect and ${\bar{K}}^{* *} (1300)$ Production in $K^{-} + p \to K^{-} + π^{+} + π^{-} + p$ at 5.5 BeV/c

J. C. Park, S. Kim, G. Chandler, G. Ascoli, E. L. Goldwasser, and T. P. Wangler

Phys. Rev. Lett. 20, 171 (1968) - Published 22 January, 1968

Electrical Resistivity of Nickel at Low Temperatures

F. C. Schwerer and J. Silcox

Phys. Rev. Lett. 20, 101 (1968) - Published 15 January, 1968

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Measurements of the temperature dependence of the electrical magnetoresistivity of a nickel polycrystal are analyzed to find the resistivity at zero magnetic induction as a function of temperature. It is seen that quantitative differences occur between these data and data taken at zero applied field.

Experimental Evidence of Bulk Helicon-Phonon Coupling in PbTe

W. Schilz

Phys. Rev. Lett. 20, 104 (1968) - Published 15 January, 1968

Conduction-Electron Polarization at Inequivalent Pt Sites in Rare-Earth-Platinum Alloys

R. Vijayaraghavan, Satish K. Malik, and V. Udaya Shankar Rao

Phys. Rev. Lett. 20, 106 (1968) - Published 15 January, 1968

Size Effects in the Electronic Thermal Conductivity of Gallium Single Crystals

Robert I. Boughton and M. Yaqub

Phys. Rev. Lett. 20, 108 (1968) - Published 15 January, 1968

Spectroscopy of Odd-Odd Nuclei with Direct ( $d, α$ ) Reactions

W. W. Daehnick and Y. S. Park

Phys. Rev. Lett. 20, 110 (1968) - Published 15 January, 1968

Particle-Core Coupling in the Lead Nuclei

Nelson Stein, C. A. Whitten, Jr., and D. A. Bromley

Phys. Rev. Lett. 20, 113 (1968) - Published 15 January, 1968

Rotational States in ${Ne}^{20}$ Excited by the Reaction $O^{16} ({Li}^{7}, t)$

R. Middleton, B. Rosner, D. J. Pullen, and L. Polsky

Phys. Rev. Lett. 20, 118 (1968) - Published 15 January, 1968

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Solar Modulation and the Galactic Intensity of Cosmic-Ray Positrons and Negatrons

Reuven Ramaty and Richard E. Lingenfelter

Phys. Rev. Lett. 20, 120 (1968) - Published 15 January, 1968

Simple Systematic Behavior in Multiple Pion Production in 25-BeV/c $π^{-} p$ Collisions

J. W. Elbert, A. R. Erwin, S. Mikamo, D. Reeder, Y. Y. Chen, W. D. Walker, and A. Weinberg

Phys. Rev. Lett. 20, 124 (1968) - Published 15 January, 1968

Study of Electron-Positron Annihilation into $π^{+} π^{-}$ at 775 MeV with the Orsay Storage Ring

J. E. Augustin, J. C. Bizot, J. Buon, J. Haissinski, D. Lalanne, P. C. Marin, J. Perez-y-Jorba, F. Rumpf, E. Silva, and S. Tavernier

Phys. Rev. Lett. 20, 126 (1968) - Published 15 January, 1968

Photoproduction of $π^{+}$ , $π^{0}$ , and $K^{+}$ Near $t = 0$

Nina Byers and Gerald H. Thomas

Phys. Rev. Lett. 20, 129 (1968) - Published 15 January, 1968

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It is shown that the coherent-droplet model with long-range $π$ exchange can account for the observed behavior with $- t$ of the high-energy, small-momentum-transfer differential cross sections for $γ + p \to π^{+} + n$ , $γ + p \to π^{0} + p$ , and $γ + p \to K^{+} + Λ$ . As in $n - p$ charge-exchange scattering, the steep rise near $- t = 0$ in $γ + p \to π^{+} + n$ is the effect of long-range $π$ exchange. The dip near $- t = 0$ in $γ + p \to K^{+} + Λ$ is accounted for by the presence of large helicity-flip amplitudes. Experiments to check this are suggested.

Di-Pion Production in High-Energy $π^{-} p$ Collisions

W. D. Walker, M. A. Thompson, W. J. Robertson, B. Y. Oh, Y. Y. Lee, R. W. Hartung, A. F. Garfinkel, A. R. Erwin, and J. L. Davis

Phys. Rev. Lett. 20, 133 (1968) - Published 15 January, 1968

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We report here the observation of the two processes $π^{-} + p \to π^{-} + π^{0} + p$ and $π^{-} + p \to π^{-} + π^{+} + n$ at bombarding energies of 7.0 and 25 BeV. A process in which the nucleon is dissociated seems to be present at 7.0 BeV and is dominant at 25 BeV. Arguments are presented to show that the results are consistent with diffraction dissociation.

Laser-Induced Fluorescence in a Molecular Beam of Iodine

Shaoul Ezekiel and Rainer Weiss

Phys. Rev. Lett. 20, 91 (1968) - Published 15 January, 1968

Two-Photon Spectrum of a Liquid

K. B. Eisenthal, M. W. Dowley, and W. L. Peticolas

Phys. Rev. Lett. 20, 93 (1968) - Published 15 January, 1968

Plasma Wave Echo Experiment

J. H. Malmberg, C. B. Wharton, R. W. Gould, and T. M. O'Neil

Phys. Rev. Lett. 20, 95 (1968) - Published 15 January, 1968

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Further Results for the Many-Body Problem in One Dimension

Bill Sutherland

Phys. Rev. Lett. 20, 98 (1968) - Published 15 January, 1968

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Rotational Hfs Spectra of $H_{2}^{+}$ Molecular Ions

K. B. Jefferts

Phys. Rev. Lett. 20, 39 (1968) - Published 8 January, 1968

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Rf transitions characteristic of interaction between the electron spin and the molecular rotation have been observed in para- $H_{2}^{+}$ . Values of the coupling coefficients ( $ρ$ - type doubling constant) are given for two vibrational states tentatively identified as $v = 5$ and $v = 6$ . An approximate determination of the rotational magnetic moment in the rotational state $K = 2$ has also been made.

Echo Behavior in Ruby

D. Grischkowsky and S. R. Hartmann

Phys. Rev. Lett. 20, 41 (1968) - Published 8 January, 1968

Experimental Detection of Internal Polaron States Associated with the Indirect Edge of AgBr Using Piezo-Optical Transmission

G. Ascarelli

Phys. Rev. Lett. 20, 44 (1968) - Published 8 January, 1968

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Generalized Deck Effect and ${\bar{K}}^{* *} (1300)$ Production in $K^{-} + p \to K^{-} + π^{+} + π^{-} + p$ at 5.5 BeV/c

Electrical Resistivity of Nickel at Low Temperatures

Experimental Evidence of Bulk Helicon-Phonon Coupling in PbTe

Conduction-Electron Polarization at Inequivalent Pt Sites in Rare-Earth-Platinum Alloys

Size Effects in the Electronic Thermal Conductivity of Gallium Single Crystals

Spectroscopy of Odd-Odd Nuclei with Direct ( $d, α$ ) Reactions

Particle-Core Coupling in the Lead Nuclei

Rotational States in ${Ne}^{20}$ Excited by the Reaction $O^{16} ({Li}^{7}, t)$

Solar Modulation and the Galactic Intensity of Cosmic-Ray Positrons and Negatrons

Simple Systematic Behavior in Multiple Pion Production in 25-BeV/c $π^{-} p$ Collisions

Study of Electron-Positron Annihilation into $π^{+} π^{-}$ at 775 MeV with the Orsay Storage Ring

Photoproduction of $π^{+}$ , $π^{0}$ , and $K^{+}$ Near $t = 0$

Di-Pion Production in High-Energy $π^{-} p$ Collisions

Laser-Induced Fluorescence in a Molecular Beam of Iodine

Two-Photon Spectrum of a Liquid

Plasma Wave Echo Experiment

Further Results for the Many-Body Problem in One Dimension

Rotational Hfs Spectra of $H_{2}^{+}$ Molecular Ions

Echo Behavior in Ruby

Experimental Detection of Internal Polaron States Associated with the Indirect Edge of AgBr Using Piezo-Optical Transmission

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