SPINS OF LEVELS IN N$sup 15$, Fe$sup 57$, Cu$sup 64$, Zr$sup 92$, AND Hg$sup 200$ BY NEUTRON CAPTURE $gamma$-RAY DIRECTIONAL CORRELATIONS
Neutron capture gamma directional correlations, with the assumption of negligible M2 admixture in high energy E1 transitions, are used to deduce spins of levels in /sup 15/N, /sup 57/Fe, /sup 64/Cu, /sup 92/Zr, and /sup 200/Hg. For several of the correlations studied, multipolarities of primary gamma rays, and hence parities of certain levels, are inferred from the systematics of neutron capture gamma radiation strengths and other information. On this basis, the following assignments are made: /sup 15/N: 6.32 Mev level, 3/2 or 5/2; /sup 57/ Fe: 0.365 Mev level, 3/2; /sup 64/Cu: 0.277 and 0.607 Mev levels, 1 or 2/sup +/; / sup 92/Zr: 2.33 Mev level, 3/sup -/, negative energy resonance dominating thermal capture, 2. /sup 200/Hg: 1.59 Mev and 2.10 Mev levels, 1/sup +/, resonance at -2 ev, 0. In /sup 200/Hg, as a consequence of the spin 0 capturing state assignment and E1 multipolarity assignments for primary gamma rays, levels at 2.39, 2.64, 2.97, 3.09, 3.21 and 3.38 Mev are tertatively concluded to be 1/sup +/. Information concerning gamma multipole mixtures is also obtained in /sup 15/N and /sup 57/Fe (auth)
- Research Organization:
- Atomic Energy of Canada Ltd., Chalk River, Ont.
- NSA Number:
- NSA-18-018990
- OSTI ID:
- 4030922
- Journal Information:
- Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B, Vol. Vol: 50; Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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