First <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>?</mml:mi></mml:math> -decay spectroscopy of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>In</mml:mi><mml:mprescripts /><mml:none /><mml:mn>135</mml:mn></mml:mmultiscripts></mml:math> and new <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>?</mml:mi></mml:math> -decay branches of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>In</mml…
نویسندگان
چکیده
The $\beta$ decay of the neutron-rich $^{134}$In and $^{135}$In was investigated experimentally in order to provide new insights into nuclear structure tin isotopes with magic proton number $Z=50$ above $N=82$ shell. $\beta$-delayed $\gamma$-ray spectroscopy measurement performed at ISOLDE facility CERN, where indium were selectively laser-ionized on-line mass separated. Three $\beta$-decay branches established, two which observed for first time. Population neutron-unbound states decaying via $\gamma$ rays identified daughter nuclei $^{134}$In, $^{134}$Sn $^{133}$Sn, excitation energies exceeding neutron separation energy by 1 MeV. one- two-neutron emission branching ratios determined compared theoretical calculations. one-neutron be dominant branch even though Gamow-Teller resonance is located substantially $^{134}$Sn. Transitions following are reported time, including tentatively attributed $^{135}$Sn. In total, six levels on basis $\beta \gamma \gamma$ coincidences decays. A transition that might a candidate deexciting missing single-particle $13/2^+$ state $^{133}$Sn both decays its assignment discussed. Experimental level schemes $^{135}$Sn shell-model predictions. Using fast timing technique, half-lives $2^+$, $4^+$ $6^+$ determined.
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2021
ISSN: ['2470-0002', '2469-9985', '2469-9993']
DOI: https://doi.org/10.1103/physrevc.104.044328