Excited-state lifetimes in <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>In</mi><mprescripts></mprescripts><none></none><mn>131</mn></mmultiscripts></math>, <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Sn</mi><mprescripts></mprescripts><none></none><mn>131</mn></mmultiscripts></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Te</mi><mprescripts></mprescripts><none></none><mn>136</mn></mmultiscripts></math> measured with the HiCARI <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>γ</mi></math>-ray spectrometer at RIBF at RIKEN

J. Acosta; A. Jungclaus; M. Armstrong; M. Górska; T. Parry; Zs. Podolyák; P. Doornenbal; K. Wimmer; A. Gargano; N. Aoi; H. Baba; F. Browne; C. Campbell; H. Crawford; H. de Witte; F. Flavigny; C. Fransen; H. Hess; E. Ideguchi; S. Iwazaki; J. Kim; A. Kohda; T. Koiwai; B. Mauss; R. Mizuno; B. Moon; M. Niikura; R. Orlandi; L. Plagnol; P. Reiter; H. Sakurai; D. Suzuki; R. Taniuchi; S. Thiel; Y. Yamamoto

doi:10.1103/mysq-byyv

Excited-state lifetimes in ${}^{131}{In}$ , ${}^{131}{Sn}$ , and ${}^{136}{Te}$ measured with the HiCARI $γ$ -ray spectrometer at RIBF at RIKEN

J. Acosta ¹, A. Jungclaus^1,*, M. Armstrong ², M. Górska ², T. Parry ³, Zs. Podolyák³, P. Doornenbal ⁴, K. Wimmer ^2,1,5,4, A. Gargano ⁶ et al.

N. Aoi ⁷, H. Baba ⁴, F. Browne ⁴, C. Campbell ⁸, H. Crawford ⁸, H. de Witte⁹, F. Flavigny ¹⁰, C. Fransen ¹¹, H. Hess¹¹, E. Ideguchi ⁷, S. Iwazaki ⁷, J. Kim¹², A. Kohda⁷, T. Koiwai⁵, B. Mauss ⁴, R. Mizuno ⁵, B. Moon ^13,4, M. Niikura ^5,4, R. Orlandi ¹⁴, L. Plagnol ¹⁰, P. Reiter ¹¹, H. Sakurai ^4,5, D. Suzuki ⁴, R. Taniuchi ¹⁵, S. Thiel¹¹, and Y. Yamamoto⁷

¹Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
²GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
³Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
⁴RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
⁵Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
⁶Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, I-80126 Napoli, Italy
⁷Research Center for Nuclear Physics (RCNP), Osaka University, Mihogakoa, Ibaraki, Osaka 567-0047, Japan
⁸Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
⁹Institute for Nuclear and Radiation Physics, KU Leuven, Leuven B-3001, Belgium
¹⁰LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F-14050 Caen, France
¹¹Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany
¹²Department of Physics, Korea University, Seoul 02841, Republic of Korea
¹³Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon 34126, Republic of Korea
¹⁴Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
¹⁵School of Physics, Engineering and Technology, University of York, Heslington, York YO10 5DD, United Kingdom

^*Contact author: andrea.jungclaus@csic.es

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Phys. Rev. C 111, 064316 – Published 16 June, 2025

DOI: https://doi.org/10.1103/mysq-byyv

Abstract

In the years 2020 to 2021, a high resolution in-beam $γ$ -ray spectroscopy campaign took place at the Radio Isotope Beam Factory within the frame of the HiCARI project. An array composed of 12 composite Ge detectors of different types was put together by an international collaboration in order to address a variety of physics cases of interest, in many cases by measuring excited-state half-lives using Doppler-shift techniques. The analysis of the Doppler-shifted lineshapes observed for the 988-keV, $3 / 2^{-} \to 1 / 2^{-}$ and 1655-keV, $5 / 2^{+} \to 3 / 2^{+}$ spin-flip $M 1$ transitions in ${}^{131}{In}$ and ${}^{131}{Sn}$ , respectively, the 332-keV, $1 / 2^{+} \to 3 / 2^{+} l$ -forbidden $M 1$ transition in ${}^{131}{Sn}$ , as well as the 607-keV, $2_{1}^{+} \to 0_{1}^{+}$ decay in ${}^{136}{Te}$ allowed to characterize this new detector array and to establish a valid analysis procedure. The extracted half-lives are compared to previously reported results as well as theoretical calculations.

Physical Review C

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Excited-state lifetimes in ${}^{131}{In}$ , ${}^{131}{Sn}$ , and ${}^{136}{Te}$ measured with the HiCARI $γ$ -ray spectrometer at RIBF at RIKEN

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Excited-state lifetimes in In131, Sn131, and Te136 measured with the HiCARI γ-ray spectrometer at RIBF at RIKEN

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Excited-state lifetimes in ${}^{131}{In}$ , ${}^{131}{Sn}$ , and ${}^{136}{Te}$ measured with the HiCARI $γ$ -ray spectrometer at RIBF at RIKEN