Level structure studies in $sup 99$Tc, $sup 140$Ce and $sup 147$Pm
Energy and intensity measurements with considerable precision have been done in $sup 99$Tc, $sup 140$Ce and $sup 147$Pm using a 8 cc Ge(Li) detector in conjunction with ND-1100 multichannel analyser. The technique of Gehrke et. al was used for energy and efficiency calibration. The accuracy obtained in energy and intensity measurements were of the order of 0.05 keV and 3-5 percent respectively. With this accuracy, it was possible to improve upon the previous values of energies and intensities. In addition, gamma ray coincidence spectra were taken in $sup 140$Ce and $sup 147$Pm using a Ge(Li)-NaI(Tl) fast-coincidence set-up. On the basis of single's as well as coincidence studies, the existence of 312 keV gamma ray in $sup 147$Pm has been confirmed. Also, the existence of 722 keV level in $sup 147$Pm has been confirmed. The 298 keV gamma ray proposed by H. Singh et. al has not been observed in the present study. (auth)
- Research Organization:
- Panjab Univ., Chandigarh, India
- NSA Number:
- NSA-33-024806
- OSTI ID:
- 4038864
- Country of Publication:
- India
- Language:
- English
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