Beta decay of the proton-rich nuclei 102Sn and 104Sn

Beta decay of the proton-rich nuclei 102Sn and 104Sn

Karny, M.; Batist, L.; Banu, A.; Becker, F.; Blazhev, A.; Brown, B. A.; Brüchle, W.; Döring, J.; Faestermann, T.; Gorska, M.; Grawe, H.; Janas, Z.; Jungclaus, A.; Kavatsyuk, M.; Kavatsyuk, O.; Kirchner, R.; La Commara, M.; Mandal, S.; Mazzocchi, C.; Miernik, K.; Mukha, I.; Muralithar, S.; Plettner, C.; Plochocki, A.; Roeckl, E.; Romoli, M.; Rykaczewski, K.; Schädel, M.; Schmidt, K.; Schwengner, R.; Zylicz, J.

The decays of 102 Sn and 104 Sn were studied by using high-resolution germanium detectors as well as a Total Absorption Spectrometer (TAS). For 104 Sn, with three new beta-delayed gamma rays identified, the total Gamow-Teller strength (BGT) value of 2.7(3) was obtained. For 102Sn, the gamma-gamma coincidence data were collected for the first time, allowing us to considerably extend the decay scheme. This scheme was
used to unfold the TAS data and to deduce a BGT value of 4.2(8) for this decay. This result is compared to
shell model predictions, yielding a hindrance factor of 3.6(7) in agreement with those obtained previously for 98Cd and 100In. Together with the latter two, 102 Sn completes the triplet of Z < 50, N > 50 nuclei
with two proton holes, one proton hole and one neutron particle, and two neutron particles with respect to the doubly magic 100Sn core.

Keywords: Nuclear structure; Gamma-ray spectroscopy; Beta decay; Gamov-Teller strength; Shell model

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