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31.
Prokscha T Morenzoni E Eshchenko DG Garifianov N Glückler H Khasanov R Luetkens H Suter A 《Physical review letters》2007,98(22):227401
The formation of hydrogenlike muonium (Mu) has been studied as a function of implantation energy in intrinsic Si, thin films of condensed van der Waals gases (N2, Ne, Ar, Xe), fused and crystalline quartz, and sapphire. By varying the initial energy of positive muons (mu+) between 1 and 30 keV the number of electron-hole pairs generated in the ionization track of the mu+ can be tuned between a few and several thousand. The results show the strong suppression of the formation of those Mu states that depend on the availability of excess electrons. This indicates that the role of H-impurity states in determining electric properties of semiconductors and insulators depends on the way in which atomic H is introduced into the material. 相似文献
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A. R. Arends C. Hohenemser F. Pleiter H. de Waard L. Chow R. M. Suter 《Hyperfine Interactions》1980,8(1-3):191-213
Data reduction schemes currently used for time differential perturbed angular correlation measurements are evaluated in terms of (i) their relative effectiveness in eliminating irrelevant variables, including single counter efficiencies and spectrum time shifts; and (ii) their effectiveness in putting data in a form that can easily be fitted by theoretical correlation functions. It is pointed out that erroneous conclusions may be derived from improperly reduced data, but that properly analyzed experiments performed at four angles allow a good determination of both the time-dependent and time-independent parts of the correlation function. Correction of data for accidentals, source self-absorption and spectrum livetime differences are discussed. 相似文献
34.
L.J. Azevedo W.G. Clark G. Deutscher R.L. Greene G.B. Street L.J. Suter 《Solid State Communications》1976,19(3):197-201
A measurement of the temperature and angular dependence of the upper critical magnetic field Hc2 in crystals of polymeric (SN)x is reported. A large anisotropy is observed at all temperatures with Hc26 = 8.1 ± 0.4 kOe parallel to, and Hc2⊥ = 870 ± 80 Oe perpendicular to, the polymer axis at 0°K. The results are explained in terms of the polymeric crystal structure and fibrous morphology of (SN)x. 相似文献
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Ohne ZusammenfassungStipendiat des Schweizerischen Nationalfonds 相似文献
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The branching ratios between the radiative single and double electron transitions into the doubly ionized K-shell were measured as a function of the atomic number. The results are compared with various theoretical predictions. 相似文献
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The application of hyperfine techniques to the study of magnetic critical phenomena is selectively reviewed. Topics discussed are probe independence, the test of universality via measurements of static exponents, static exponents in disordered systems, and dynamic critical phenomena.Work supported in part by the National Science Foundation. 相似文献
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