V. Remeikis et al., Experimental determination of the chemical changes in the electron densityon indium nuclei by the gamma-spectrometric Delta I-gamma/I-gamma method, HYPER INTER, 128(4), 2000, pp. 397-408
The gamma -spectrometry method for determination of the relative change Del
ta lambda (EC)/lambda (EC) in the partial probability lambda (EC) for the I
n-114m decay branch by the electron capture (EC), when the nucleus is in di
fferent chemical environments, was developed. The method is based on an exp
erimental determination of the relative change DeltaI(gamma)/I-gamma in the
intensity of the gamma -radiation which is emitted by the excited daughter
Cd-114 nuclei after EC. The In-114m decay by EC in indium metal, In2O3 and
InAs was compared. The largest DeltaI(gamma)/I-gamma=(2.5 +/-0.8).10(-4) h
as been found for InAs relatively to In2O3. The chemical changes in the ele
ctron density on the indium nucleus corresponding to the measured DeltaI(ga
mma)/I-gamma values have been determined.