NUCLEAR BETA-DECAY ENERGY SYSTEMATICS INCLUDING EXCITED STATES
A survey of experimental beta-decay energies involving ground states and excited states in the mass region A = 40 to 150 is presented. The data are compared with the hypothesis that straight lines are an approximation to the order of 30 kev in portions of the smooth, often bent Way and Wood trends and the corresponding constant neutron trends, which appear similar, as expected. An attempt was made to correlate states with the same spin and parity which seemed to belong to the same subshell. At the mass difference CdIn, this permits the interpolation of Cd/sup 111/--In/sup 111/ = (--0.82 plus or minus 0.03) MeV, calculated from experimental data to be --1.24 plus or minus 0.21. In Y/sup 83/ , however, the hypothesis requires a 9/2/sup +/ground state in contrast to the experimental (1/2/sup -/). Furthermore, the Pd/sup 99/ (2.0 plus or minus 0.1)- Mev BETA /sup +/-ray must be assumed to lead to the Rh/sup 89/ ground state. Two quadrangle-patterns can then be drawn in the range A = 91 to 101 for Y-Zr, Nb- Mo, Tc-Ru and Rh-Pd, being fivefold overdetermined. Each consists of 12 beta- decay energies interconnected by 7 straight lines. Twenty consequences concerning decay energies, excitation energies and spins are given as possibilities to check the hypothesis for this mass range. Its validity would mean that also the level distances, e.g., between the 1/2/sup -/ and 9/2/sup +/ states in Y, Nb, Tc and Rh for N =50, 52, 54 and 56 each, vary almost linearly for isotopes and isotones, and that the subshell structure is not obscured by configuration mixing. (auth)
- Research Organization:
- Ames Lab., Ames, IA (United States)
- NSA Number:
- NSA-16-026287
- OSTI ID:
- 4824190
- Report Number(s):
- IS-408
- Journal Information:
- Nuclear Phys., Vol. Vol: 36; Other Information: IS-408. Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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