XU, Z.Y; MADURGA, M; GRZYWACZ, R; KING, T.T; ALGORA, A; ANDREYEV, A.N; BENITO, J; BERRY, T; BORGE, M.J.G; COSTACHE, C; DE WITTE, H; FIJALKOWSKA, A; FRAILE, L.M; FYNBO, H.O.U; GOTTARDO, A; HALVERSON, C; HARKNESS-BRENNAN, L.J; HEIDEMAN, J; HUYSE, M; ILLANA, A; JANIAK, Ł; JUDSON, D.S; KORGUL, A; KURTUKIAN-NIETO, T; LAZARUS, I; LICĂ, R; LOZEVA, R; MARGINEAN, N; MARGINEAN, R; MAZZOCCHI, C; MIHAI, C; MIHAI, R.E; MORALES, A.I; PAGE, R.D; PAKARINEN, J; PIERSA-SIŁKOWSKA, M; PODOLYÁK, Zs; SARRIGUREN, P; SINGH, M; SOTTY, Ch; STEPANIUK, M; TENGBLAD, O; TURTURICA, A; VAN DUPPEN, P; VEDIA, V; VIÑALS, S; WARR, N; YOKOYAMA, R; YUAN, C.X

doi:10.1103/PhysRevLett.131.022501

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XU, Z.Y

MADURGA, M

GRZYWACZ, R

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Physical Review Letters. 2023, vol. 131, n° 2, p. 022501

American Physical Society

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The $\beta$ decays from both the ground state and a long-lived isomer of $^{133}$In were studied at the ISOLDE Decay Station (IDS). With a hybrid detection system sensitive to $\beta$, $\gamma$, and neutron spectroscopy, the comparative partial half-lives (logft) have been measured for all their dominant $\beta$-decay channels for the first time, including a low-energy Gamow-Teller transition and several First-Forbidden (FF) transitions. Uniquely for such a heavy neutron-rich nucleus, their $\beta$ decays selectively populate only a few isolated neutron unbound states in $^{133}$Sn. Precise energy and branching-ratio measurements of those resonances allow us to benchmark $\beta$-decay theories at an unprecedented level in this region of the nuclear chart. The results show good agreement with the newly developed large-scale shell model (LSSM) calculations. The experimental findings establish an archetype for the $\beta$ decay of neutron-rich nuclei southeast of $^{132}$Sn and will serve as a guide for future theoretical development aiming to describe accurately the key $\beta$ decays in the rapid-neutron capture (r-) process.< Réduire

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$^{133}$In: A Rosetta Stone for decays of r-process nuclei

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