NUCLEAR ORIENTATION OF Mn$sup 54$ AND Mn$sup 52$m
The spins of the nuclides Mn/sup 54/(290 days) and Mn/sup 52m/ (21 min), icorporated in the lattice of cerium magnesium nitrate and nickel fluosilicate crystals, were oriented at low temperatures. The measurement of the angular distribution of the gamma rays from Mn/sup 54/indicates the spin of Mn/sup 54/ to be 3 or 2; in the latter case, the beta decay must be predominantly of the Fermi type with an upper limit of 10% of a possible Gamow-Teller admixture. From a simultaneous measurement of the angular distribution of ths gamma rays from Mn/sup 54/and 5.7-day Mn/sup 52/the ratio of the nuclear g values of the two isotopes is found, which yields a magnetic moment for Mn/sup 54/of 2.55 plus or minus 0.21 nm(for spin 3) or 2.16 plus or minus 0.26nm (for spin 2). The circular polarization measurements of the gamma rays from Mn/sup 54/ determine this moment to be positive. Similar angular distribution experiments on Mn/sup 52m/, assuming spin 2, yield a magnetic moment of 1.04 plus or minus 0.16 nm if the beta decay is predominantly a Gamow-Teller transition, or 0.72 plus or minus 0.16 nm for a pure Fermi transition. These results indicate that the nuclear g values of the 21-min and the 5.7-day states of Mn/sup 52/ are about the same. (auth)
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge
- NSA Number:
- NSA-15-003459
- OSTI ID:
- 4143190
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 120; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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