Isomers and high-spin structures in the isotones and
- Universitat zu Koln (Germany). Institut fur Kernphysik
- Universita di Padova (Italy). Dipartimento di Fisica e Astronomia; Laboratori Nazionali di Legnaro (Italy). Istituto Nazionale di Fisica Nucleare
- Laboratori Nazionali di Legnaro (Italy). Istituto Nazionale di Fisica Nucleare
- Univ. of Birmingham (United Kingdom)
- Saitama University, Saitama City (Japan)
- Istituto Nazionale di Fisica Nucleare, Sezione di Padova (Italy)
- Univ. of Surrey, Guildford (United Kingdom)
- Universita di Milano and INFN Sezione di Milan (Italy)
- CEA Saclay, Service de Physique Nucleaire (France)
- Univ. of Manchester (United Kingdom)
- University of the West of Scotland, Paisley (United Kingdom)
- Univ. of Rochester, NY (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- CSIC-Universidad de Valencia (Spain)
- Uppsala Univ. (Sweden)
- Univ. of Oslo (Norway); Universite Paris-Saclay (France); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Universita di Padova (Italy); Sezione di Padova (Italy)
- Instituto de Estructura de la Materia, CSIC, Madrid (Spain)
- Universite Paris-Saclay (France)
- University of the West of Scotland (United Kingdom); Universita di Padova (Italy); Sezione di Padova (Italy)
- Ruder Boskovic Institute (Croatia)
- Laboratori Nazionali di Legnaro (Italy).
- Universita di Torino and INFN (Italy)
- Univ. of Surrey, Guildford (United Kingdom) ; National Physical Laboratory, Teddington (United Kingdom)
- Laboratori Nazionali di Legnaro (Italy)
- Copenhagen Univ. (Denmark)
- University of the West of Scotland (United Kingdom)
- Universite de Lyon (France)
- Henryk Niewodniczanski Institute of Nuclear Physics PAN (Poland)
- CCLRC Daresbury Laboratory, Warrington (United Kingdom)
In this study, the high-spin structures and isomers of the N=81 isotones 135Xe and 137Ba are investigated after multinucleon-transfer (MNT) and fusion-evaporation reactions. Both nuclei are populated (i) in 136Xe +238U and (ii) 136Xe+208Pb MNT reactions employing the high-resolution Advanced Gamma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (iii) in the 136Xe+198Pt MNT reaction employing the γ-ray array GAMMASPHERE in combination with the gas-detector array CHICO, and (iv) via a 11B+130Te fusion-evaporation reaction with the HORUS γ-ray array at the University of Cologne. The high-spin level schemesof 135Xe and 137Ba are considerably extended to higher energies. The 2058-keV (19/2-) state in 135Xe is identified as an isomer, closing a gap in the systematics along the N=81 isotones. Its half-life is measured to be 9.0(9) ns, corresponding to a reduced transition probability of B(E2,19/2-→15/2-)=0.52(6) W.u. The experimentally deduced reduced transition probabilities of the isomeric states are compared to shell-model predictions. Finally, latest shell-model calculations reproduce the experimental findings generally well and provide guidance to the interpretation of the new levels.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1423613
- Journal Information:
- Physical Review C, Vol. 95, Issue 2; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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