Recent Articles

The first direct observation of domain switching in radiation damaged ferroelectric K $H_{2}$ P $O_{4}$ using electron spin resonance is reported. This switching is demonstrated by the observation of a reversal in orientation for the · OP $O_{3}$ $H^{-}$ free-radical ions during polarization of the damaged crystal by an electric field. The reversal is accomplished by an intramolecular charge transfer which permits reversal of the damage sites on the microscopic level.

Measurement of Photoabsorption of the Lithium Halides Near the Lithium $K$ Edge

R. Haensel, C. Kunz, and B. Sonntag

Phys. Rev. Lett. 20, 262 (1968) - Published 5 February, 1968

Interactions of Dislocations with Electrons in Metals

C. Elbaum and A. Hikata

Phys. Rev. Lett. 20, 264 (1968) - Published 5 February, 1968

Nuclear Spin-Lattice Relaxation in Pure and Impure Superconducting Indium

J. Butterworth and D. E. MacLaughlin

Phys. Rev. Lett. 20, 265 (1968) - Published 5 February, 1968

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Nuclear spin-lattice relaxation measurements in the superconducting state of pure indium and of indium-lead solid solutions show behavior consistent with an essentially impurity-independent broadening of the superconducting energy gap, this conflicting with previous ideas on the importance of energy-gap anisotropy.

Surface Nucleation Field $H_{c 3}$ of Pure Lead

Gaston Fischer

Phys. Rev. Lett. 20, 268 (1968) - Published 5 February, 1968

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New measurements of $H_{c 3} (T)$ are presented for pure Pb. The analysis of the present data suggests that $H_{c 3} (T)$ in pure Pb depends strongly upon the type of electron scattering at the surface. When this effect is properly taken into consideration, it is possible to derive the bulk critical field $H_{c 2} (T)$ and Ginzburg-Landau parameter $κ_{1} (T)$ of pure Pb, with results very close to predictions from recent theories of strong-coupling superconductors.

Precession Measurements of the 0.847-MeV Level of ${Fe}^{56}$ Implanted in Iron After a ( $p, p^{'}$ ) Reaction

R. Kalish and W. J. Kossler

Phys. Rev. Lett. 20, 271 (1968) - Published 5 February, 1968

Measurement of Polarization in $π^{-} p \to π^{0} n$ and $π^{-} p \to η n$

D. D. Drobnis, J. Lales, R. C. Lamb, R. A. Lundy, A. Moretti, R. C. Niemann, T. B. Novey, J. Simanton, A. Yokosawa, and D. D. Yovanovitch

Phys. Rev. Lett. 20, 274 (1968) - Published 5 February, 1968

Limit on Variation of $e^{2}$ with Time

S. M. Chitre and Yash Pal

Phys. Rev. Lett. 20, 278 (1968) - Published 5 February, 1968

Structure of High-Energy, Large-Momentum-Transfer Collision Processes

H. D. I. Abarbanel, S. D. Drell, and F. J. Gilman

Phys. Rev. Lett. 20, 280 (1968) - Published 5 February, 1968

Zero-Degree Production of High-Momentum $π^{+}$ Mesons by $π^{-}$ Mesons Incident on Nuclei

R. A. Lundy, I. A. Pless, D. R. Rust, D. D. Yovanovitch, and Vera Kistiakowsky

Phys. Rev. Lett. 20, 283 (1968) - Published 5 February, 1968

Measurement of the Energy Dependence of the Form Factor in ${K_{L}}^{0} \to π + e + ν$ Decay

Samuel H. Aronson and K. Wendell Chen

Phys. Rev. Lett. 20, 287 (1968) - Published 5 February, 1968

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The pion energy distribution in ${K_{L}}^{0} \to π + e + ν$ decay has been measured at the Princeton-Pennsylvania Accelerator using a wide-gap spark-chamber spectrometer. The results are consistent with vector interaction and an energy-independent form factor. The energy-dependence parameter $λ$ is found to be +0.020±0.013.

Electron-Proton Elastic Scattering at High Momentum Transfers

D. H. Coward, H. DeStaebler, R. A. Early, J. Litt, A. Minten, L. W. Mo, W. K. H. Panofsky, R. E. Taylor, M. Breidenbach, J. I. Friedman, H. W. Kendall, P. N. Kirk, B. C. Barish, J. Mar, and J. Pine

Phys. Rev. Lett. 20, 292 (1968) - Published 5 February, 1968

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Cross Section for the Production of Singly Ionized Helium by Electron Impact at Low Energies

Confirmation of the Discrepancy Between the Theoretical and Experimental Ground-State Energies of $H_{2}$

Collisions of Singlet Excitons in Molecular Crystals

Scattering of Light by Thermal Ripplons

Diffusion of Exchange Energy in Solid ${He}^{3 +}$

Sound Propagation Through a Dilute Solution of ${He}^{3}$ - ${He}^{4}$

Theory of Phase Separation in Solid ${}^{3}{He}$ - ${}^{4}{He}$ Mixtures

Electric Field Suppression of the Lambda Point in Liquid Helium

Domain Switching in Irradiated Ferroelectric K $H_{2}$ P $O_{4}$ Observed by Electron Spin Resonance

Measurement of Photoabsorption of the Lithium Halides Near the Lithium $K$ Edge

Interactions of Dislocations with Electrons in Metals

Nuclear Spin-Lattice Relaxation in Pure and Impure Superconducting Indium

Surface Nucleation Field $H_{c 3}$ of Pure Lead

Precession Measurements of the 0.847-MeV Level of ${Fe}^{56}$ Implanted in Iron After a ( $p, p^{'}$ ) Reaction

Measurement of Polarization in $π^{-} p \to π^{0} n$ and $π^{-} p \to η n$

Limit on Variation of $e^{2}$ with Time

Structure of High-Energy, Large-Momentum-Transfer Collision Processes

Zero-Degree Production of High-Momentum $π^{+}$ Mesons by $π^{-}$ Mesons Incident on Nuclei

Measurement of the Energy Dependence of the Form Factor in ${K_{L}}^{0} \to π + e + ν$ Decay

Electron-Proton Elastic Scattering at High Momentum Transfers

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