| Article | |
| Report number | arXiv:2107.00517 |
| Title | First observation of high-K isomeric states in $^{249}$Md and $^{251}$Md |
| Author(s) | Goigoux, T. (IRFU, Saclay) ; Theisen, Ch. (IRFU, Saclay) ; Sulignano, B. (IRFU, Saclay) ; Airiau, M. (IRFU, Saclay) ; Auranen, K. (Jyvaskyla U.) ; Badran, H. (Jyvaskyla U. ; STUK, Helsinki) ; Briselet, R. (IRFU, Saclay) ; Calverley, T. (Jyvaskyla U. ; Liverpool U.) ; Cox, D. (Jyvaskyla U. ; Liverpool U. ; Lund U.) ; Déchery, F. (IRFU, Saclay) ; Bisso, F. Defranchi (Jyvaskyla U.) ; Drouart, A. (IRFU, Saclay) ; Favier, Z. (IRFU, Saclay) ; Gall, B. (Strasbourg, IPHC) ; Grahn, T. (Jyvaskyla U.) ; Greenlees, P.T. (Jyvaskyla U.) ; Hauschild, K. (IJCLab, Orsay) ; Herzáň, A. (Jyvaskyla U. ; Bratislava, Inst. Phys.) ; Herzberg, R.-D. (Liverpool U.) ; Jakobsson, U. (Jyvaskyla U. ; Helsinki U.) ; Julin, R. (Jyvaskyla U.) ; Juutinen, S. (Jyvaskyla U.) ; Konki, J. (Jyvaskyla U. ; CERN) ; Leino, M. (Jyvaskyla U.) ; Lightfoot, A. (Jyvaskyla U.) ; Lopez-Martens, A. (IJCLab, Orsay) ; Mistry, A. (Liverpool U. ; Darmstadt, GSI) ; Nieminen, P. (Jyvaskyla U.) ; Pakarinen, J. (Jyvaskyla U.) ; Papadakis, P. (Jyvaskyla U. ; Liverpool U. ; Daresbury) ; Partanen, J. (Jyvaskyla U.) ; Peura, P. (Jyvaskyla U. ; IAEA, Vienna) ; Rahkila, P. (Jyvaskyla U.) ; Rey-Herme, E. (IRFU, Saclay) ; Rubert, J. (Strasbourg, IPHC) ; Ruotsalainen, P. (Jyvaskyla U.) ; Sandzelius, M. (Jyvaskyla U.) ; Sarén, J. (Jyvaskyla U.) ; Scholey, C. (Jyvaskyla U.) ; Sorri, J. (Jyvaskyla U. ; STUK, Helsinki) ; Stolze, S. (Jyvaskyla U. ; Argonne) ; Uusitalo, J. (Jyvaskyla U.) ; Vandebrouck, M. (IRFU, Saclay) ; Ward, A. (Liverpool U.) ; Zielińska, M. (IRFU, Saclay) ; Jachimowicz, P. (Zielonogorski U.) ; Kowal, M. (NCBJ, Warsaw) ; Skalski, J. (NCBJ, Warsaw) |
| Publication | 2021-12-01 |
| Imprint | 2021-07-01 |
| Number of pages | 14 |
| In: | Eur. Phys. J. A 57 (2021) 321 |
| DOI | 10.1140/epja/s10050-021-00631-4 (publication) |
| Subject category | nucl-th ; Nuclear Physics - Theory ; nucl-ex ; Nuclear Physics - Experiment |
| Abstract | Decay spectroscopy of the odd-proton nuclei $^{249}$Md and $^{251}$Md has been performed. High-$K$ isomeric states were identified for the first time in these two nuclei through the measurement of their electromagnetic decay. An isomeric state with a half-life of $2.8(5)$ ms and an excitation energy $\geq 910$ keV was found in $^{249}$Md. In $^{251}$Md, an isomeric state with a half-life of $1.4(3)$ s and an excitation energy $\geq 844$ keV was found. Similarly to the neighbouring $^{255}$Lr, these two isomeric states are interpreted as 3 quasi-particle high-$K$ states and compared to new theoretical calculations. Excited nuclear configurations were calculated within two scenarios: via blocking nuclear states located in proximity to the Fermi surface or/and using the quasiparticle Bardeen-Cooper-Schrieffer method. Relevant states were selected on the basis of the microscopic-macroscopic model with a deformed Woods-Saxon potential. The most probable candidates for the configurations of $K$-isomeric states in Md nuclei are proposed. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2021-2024 The Author(s) (License: exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany) |
Corresponding record in: Inspire
Notice créée le 2022-01-12, modifiée le 2024-05-08