The volume average of the nuclear-spin relaxation rate in type-II superconductors, R s, is calculated for magnetic fields slightly below the upper critical field and all mean free paths, l, and temperatures. It is found to be expressible solely in terms of the volume average of the density of states, _N(co), where the latter quantity has been determined recently by NEU~ANrq for all l. The derivation is based on HELFAND and WERT-HAMER' S eigen-value equation for the order parameter, A. The deviation of -Rs from the relaxation rate in the normal state, Rn, is proportional to the quantity [1A IZ/A~cs(T)] Rn (the bar denotes the spatial average). The proportionality factor is found to decrease monotonously as the temperature decreases and/or I increases. This behavior is closely related to the fact that _N(co) shows no gap for the excitation energies co and decreases as l increases, in particular at energies co close to zero (co= 0 corresponds to the Fermi energy).
CoupledChannels calculations have been performed for the reaction 4~ 6Li, d)44Ti( 3-)3.94 assuming coupling of e-transfer with inelastic scattering in both the entrance and the exit channels. The effect of several competing transition routes is discussed. A relative spectroscopic factor (44Ti(3-); 4~ e) is derived.
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