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  • 1 Bhabha Atomic Research Centre Isotope Division 400 085 Mumbai India
  • | 2 Bhabha Atomic Research Centre Radiochemistry Division 400 085 Mumbai India
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The after effects of β -decay on time differential perturbed angular correlation (TDPAC) spectra of II–VI semiconductor CdS have been studied using β -emitting111Ag as well as111mCd as probe nuclei. The TDPAC spectrum of111Ag in CdS exhibits a time dependent interaction indicating that the preceding β -decay leaves the daughter nucleus in an excited state. The recovery time (τg) of the probe atom was found to be 16±6 ns while Abragam and Pound's relaxation time (τkr) was found to be 9±2 ns. The results show that β -decay does change the chemical environment around the probe atom.