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ENDOR measurements of F centres in KCl with a highly sensitive spectrometer allowed the measurement of the quadrupole line positions of the nearest 41K and 39K neighbours to ± 0.5 kHz. The sign of the quadrupole interaction constant was determined for 41K and 39K. It turned out to be positive for both nuclei. Hence the sign of the 41K quadrupole moment is positive in agreement with the only other determination so far by Bonczyk and Hughes with the molecular beam electric resonance method. 相似文献
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R. C. DuVarney S. Perkowitz 《International Journal of Infrared and Millimeter Waves》1981,2(3):587-593
A commercial general-purpose microcomputer is used to provide real-time experimental control, data acquisition and data analysis for a far infrared Fourier spectrometer. The interfacing and programming procedures are described. The microcomputer gives excellent performance at a low cost. 相似文献
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We present evidence for a nonsingular origin of the Universe with intial conditions determined by quantum physics and relativistic
gravity. In particular, we establish that the present temperature of the microwave background and the present density of the
Universe agree well with our predictions from these intial conditions, after evolution to the present age using the Einstein-Friedmann
equation. Remarkably, the quantum origin for the Universe naturally allows its evolution at exactly the critical density.
We also discuss the consequences of these results to some fundamental aspects of quantum physics in the early Universe. 相似文献
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An ENDOR study of a hole center in MgO with g|=2.0032±0.0001 and g⊥=2.0385±0.0001 reveals that the hole interacts with an axial aluminum ion with A⊥=±0.178±0.008 MHz, A⊥=±0.074±0.008 MHz, and P= ±0.366±0.002 MHz. The structure of the center is consistent with the label, VAl. It is suggested that the VAl center may have been mistaken in the past for the V- center because of the similarity of their g-values, method of production, and thermal properties. 相似文献