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Hall-coefficient measurements were made on cold-rolled Nb-25% Zr in the zero-resistance mixed state at 4.2°K and in the normal state at 4.2, 77, and 317°K. With sample current densities from 2× 10 3 to 1× 10 4 A/ cm 2 in fields of 1 and 9 kG, no Hall voltage for the superconducting sample...
Previous calculations concerning the ground state of two-electron atoms, involving Ritz-Hylleraas expansions with half-integral powers, are continued through expansions involving 31 parameters. As far as can be judged from a comparison of the energies with those obtained with other expansions,...
Doubly charged He 3 ions have been scattered from helium gas to permit the investigation of excited states in Be 7 at excitation energies between 3.9 and 8.4 MeV. In addition to the known 7 2 - level at 4.54 MeV, the 5 2 - member of this l = 3 spin-orbit doublet has also been observed. This new...
It is shown that the conventional theory of charged spin-one mesons interacting with photons can be renormalized provided meson mass m and charge e are restricted by the relation Z ( m 2 , e 2 ) = 0 , where Z is the meson wave-function renormalization constant.
The paramagnetic resonance spectrum of the ion Cu 3 + (configuration 3 d 8 which is isoelectronic with Ni 2 + ) in Al 2 O 3 has been studied. The results are correlated with the observed optical absorption spectrum in terms of crystal field theory. In addition, precise information about the...
Measurements of the magnetoelectric effect on Cr 2 O 3 powders, after magnetoelectric annealing are described. The experimental results are compared with theoretically derived relations between the magnetoelectric effect in single crystals and powders. Reasonable agreement is found.
The singularity introduced artificially into the equations of the new strip approximation, in order to bridge the gap between low and high energies, is investigated in detail. By explicit construction, it is shown that a necessary and sufficient condition for a (unique) solution of the N D...
Electron spin resonance of acceptors due to substitutional Li, and the resonance of certain donors previously reported at g ≅ 1.96 were examined using polycrystalline samples of ZnO. It was found that the latter signal could actually be a superposition of two independent signals, one arising...
The polarization of protons from the He 3 ( d , p ) He 4 reaction has been measured at eight laboratory angles between 20° and 140° for six deuteron energies from 3 to 12 MeV. The polarization was determined by scattering the protons from carbon. For all energies measured the polarization is...
Yield curves for the Al 27 ( p , γ ) Si 28 reaction at 992 keV have been studied extensively for thick and thin targets. Thick-target curves show a peak a few hundred eV above the resonance energy due to the discrete nature of energy losses suffered by protons as they penetrate the target....
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