Abstract
A 17.1min, 19/2− isomer has been established in129Sb at 1851 keV. It is fed by levels populated in the decay of the 6.2min, 11/2−129Sn isomer. This isomer decays by an M4, 723keV internal transition and by β− decay to levels in129Te. The 723keV transition is 20 times slower than 11/2−→3/2+ M4 transitions in the adjacent odd-N nuclides and is 10 times faster than the M4 transition from the 19/2− isomer in135Cs. A partial level scheme for the decay of the 11/2−,129Sn isomer is given showing levels that populate the 19/2− isomer along with a partial level scheme for129 Te.
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We wish to express our appreciation to Drs. R.L. Gill and A. Piotrowski of the TRISTAN staff and to Drs. H. Mach and J.D. Robertson for their assistance during the collection of these data.
This work has been supported by the U.S. Department of Energy under contract number DE-AS05-79ER10494.
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Stone, C.A., Walters, W.B. Decay of 17-min, 19/2−129mSb. Z. Physik A - Atomic Nuclei 328, 257–258 (1987). https://doi.org/10.1007/BF01290671
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DOI: https://doi.org/10.1007/BF01290671