Evidence for a new 191 min half-period activity in Nb
A new activity of 191-min half life was found when Nb was irradiated with neutrons from H/sup 3/(d,n)He/sup 4/. Its spectrum was found to have peaks at 200, 495, and is sufficient 930 kev; the last one was identified with the 934-kev ray from 10.15-day Nb/sup 92/ decay. The 200- and 495-kev rays, corrected for the 10.15-day activity, were found to exhibit the same half life, 191 combination rat 3 min, and to be in coincidence and of the same intensity. From spectra comparisons, the ratio of the production cross section for the 191-min activity to that for the 10.15-day activity is computed to be es sufficient t 0.018. The 191-min activity is assigned to an isomeric state of either Nb/sup 92m/ or Nb/sup 92m/, the former being more likely, and the 495-kev ray is assumed to precede the 200-kev ray and to be a o degradation t J = 4 transition, probably a M4 one. (D. L. C.)
- Research Organization:
- Istituto Nazionale di Fisica Nucleare, Florence; Universite, Florence
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-020974
- OSTI ID:
- 4176345
- Journal Information:
- Nuovo Cimento, Journal Name: Nuovo Cimento Journal Issue: 4 Vol. 16; ISSN 0029-6341
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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