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961.
P. Abreu W. Adam T. Adye E. Agasi R. Aleksan G. D. Alekseev A. Algeri S. Almehed S. J. Alvsvaag U. Amaldi et al. 《Zeitschrift fur Physik C Particles and Fields》1994,61(3):407-419
The study of the properties of inclusive production ofD
s
mesons and of events in which a and a muon are present in the same jet provides two independent measurements of the probability,f
s
w
, for a heavy quark to hadronize into a strangeB orD meson. The data sample analysed corresponds to 243,000 hadronicZ
0 decays. The combined value of these measurements isf
s
w
=0.19±0.06±0.08. From the flight distance distributions ofD
s and of (-lepton) secondary vertices, with the lepton emitted at high transverse momentum relative to the jet axis, two values are obtained for theB
s
0
meson lifetime. Combining these measurements with a previous result based on the study ofD
s- events, theB
s
0
meson lifetime is measured to be: 0.96±0.37 ps. 相似文献
962.
Martin Norgren Sailing He 《International Journal of Infrared and Millimeter Waves》1994,15(9):1537-1554
A time-harmonic electromagnetic plane wave obliquely incident on a half-space or a slab consisting of a so-called medium is considered. The up- and down-going eigenmodes in the medium are derived and used to calculate the reflection and transmission coefficients for TE and TM modes. The Brewster angles for an half-space are computed. Numerical results for the co- and cross-polarized reflection and transmission coefficients for an slab are presented. 相似文献
963.
Hong-Shuo Li J. M. Cadogan Jian-Min Xu S. X. Dou H. K. Liu 《Hyperfine Interactions》1994,94(1):1929-1935
A study of the Nd-Fe-Ti phases at the Fe-rich end of the phase diagram has been carried out using57Fe Mössbauer spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX). In particular,57Fe Mössbauer spectroscopy has been used to characterize the phases present in these samples. In addition to the two well-known 217 and 112 phases, twonovel phases have been identified, with compositions denoted by3–29 and9–94, which are closely linked to the orthorhombic ScFe6Ga6-type and the hexagonal TbCu7-type structures, respectively. The possible crystal structures of these new phases will be discussed in terms of the dumbbell substitution sequence in the CaCu5 structure. 相似文献
964.
965.
966.
Kui Zhao Xiuqin Lu Yehao Cheng Qingli Li Min Li Zhichang Li Jiyu Guo Shuyuan Li Qinghua Zhang Xiaobin Song Chenglie Jiang 《Zeitschrift für Physik A Hadrons and Nuclei》1994,348(2):95-98
Angular distributions of elastic and inelastic scattering have been measured for152Sm+12C at 63.2 MeV and148Nd+16O at 90.9 MeV. An evident interference pattern in the inelastic scattering has been observed for the first time in a strong Coulomb coupling system.We are indebted to Dr. S. Pieper for supplying the Ptolemy Program. One of us (Chenglie Jiang) would like to acknowledge the Argonne National Laboratory for the opportunity given, to perform theoretical calculations with the code Ptolemy during his visit there. Thanks are also due to Mr. H. Folger (GSI, Germany) for supplying the targets. This work was supported in part by China National Nature Science Fundation. 相似文献
967.
L. Sirleto G. Abbate G. C. Righini E. Santamato 《Applied physics. B, Lasers and optics》1994,58(2):A5-A6
Time-resolved vibrational spectroscopy
Call for papers 相似文献968.
Wolfgang Schreier Tobias Schrader Florian Roller Peter Gilch Wolfgang Zinth et al. 《Applied physics. B, Lasers and optics》1994,58(1):A6-A8
Call for papers
Time-resolved vibrational spectroscopy 相似文献969.
The statement in Rindler's book "Essential Relativity" [(Springer-Verlag, New York, 1977), p. 119] claiming that "the metric coefficients are time-independent if light signals tracing out the same path always take the same coordinate time" has two problems, the first one has been pointed out by us in a recent paper "relation between choosing ‘good' coordinates and the behavior of light signals" [Acta Physica Sinica (Overseas Edition), 3(1994), 881], while the second is the main focus of the present article. 相似文献
970.