BETA DECAY OF Y$sup 9$$sup 1$
The decay of Y/sup 91/ was studied using NaI(Tl) scintillation counters and a 4 pi beta-ray scintillation spectrometer. A single gamma ray with a measured energy of 1.208 plus or minus 0.010 Mev was observed. The shape and end-point energy of the weak ( approximately 0.3%) beta group in coincidence with the 1.208-Mev gamma ray was measured. The end-point energy was determined to be 0.319 plus or minus 0.010 Mev. The experimental shape factor is clearly in disagreement with that predicted for a once-forbidden unique transition, 41 = 2 (yes). The 0.319Mev beta spectrum yields a shape factor which may, within experimental accuracy, be interpreted as a statistical shape. These measurements yield a Y/sup 91/--Zr/sup 91/ mass difference of 1.527 plus or minus 0.014 Mev. (auth)
- Research Organization:
- Purdue Univ., Lafayette, Ind.
- NSA Number:
- NSA-14-017395
- OSTI ID:
- 4151102
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 118; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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