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# New β−decay spectroscopy of the $^{137 }$Te nucleus

Abstract : Background: Nuclear structure of the neutron-rich isotopes beyond 132 Sn is investigated. Purpose: The level scheme of 137 I is obtained after decay of 137 Te. Transitions in 136 I are detected after delayed neutron emission of 137 Te. The half life of 137 Te is measured. Methods:-delayed-ray spectroscopy is employed for neutron-rich 137 Sb and 137 Te isotopes, produced at the ILL after neutron-induced fission to populate excited states in 137 I. Results: The new decay level scheme of 137 I is established. The half lives of 137 Sb and 137 Te are determined as 0.57(26) s and 2.46(5) s, respectively. The-delayed neutron emission probability P limiting value of 137 Te is deduced to be 2.17(66)%. Conclusions: The experimental results are an important input to the theoretical description of nuclei in the region, being well interpreted within LSSM calculations and provide essential information on the firstforbidden transitions beyond > 82 and > 50.
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Journal articles

https://hal-cnrs.archives-ouvertes.fr/hal-03812617
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Submitted on : Wednesday, October 12, 2022 - 6:08:59 PM
Last modification on : Thursday, October 20, 2022 - 3:38:22 AM

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137Te_new_Min Si.pdf
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### Citation

M Si, R Lozeva, H Naïdja, A Blanc, J.-M Daugas, et al.. New β−decay spectroscopy of the $^{137 }$Te nucleus. Physical Review C, 2022, 106 (1), pp.014302. ⟨10.1103/PhysRevC.106.014302⟩. ⟨hal-03812617⟩

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