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. 2023 Jul 25;59(7):169. doi: 10.1140/epja/s10050-023-01080-x

Table 3.

Results of the isomeric yield ratios (IYR) of 129In, 129Sn, and 129Sb from different measurements. Relevant information on the fission products from the literature and the settings of the measurements are included. The literature data are from Ref. [23] unless stated otherwise. The determined angular separation of the states is also listed and compared to the value predicted based on the literature mass values [23, 32]

Nuclide Ground state Excited state IYR tacc Determined Predicted
T1/2 Spin Energy T1/2 Spin from (ms) separation separation
(keV) this work (deg) (deg)
129In 0.57 (1) s [26] (9/2+) 447 (13) [32] 1.23 (3) s (1/2-) 0.136 (14) 99 104.6 (92) 110.6 (32)
0.113 (6) 157 178.3 (5) 175.4 (52)
129Sn 2.23 (4) m 3/2+ 35.15 (5) 6.9 (1) m 11/2- 0.777 (20) 1010 51.5 (42) 88.7 (4)
129Sb 4.366 (26) h 7/2+ 1851.31 (6) 17.7 (1) m (19/2-) 0.514 (10) 24 118.8 (3) 111.0 (1)
0.515 (7) 39 189.7 (2) 180.4 (1)
0.576 (7) 39 189.2 (2) 180.4 (1)