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Article
Title Spectroscopy of $^{187}$Tl: shape coexistence
Author(s) Guo, C Y (Peking U., SKLNPT) ; Zhang, W Q (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) ; Huang, H (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) ; Zhang, S Q (Peking U., SKLNPT) ; Li, Z H (Peking U., SKLNPT) ; Liu, Z (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) ; Hua, H (Peking U., SKLNPT) ; Luo, D W (Peking U., SKLNPT) ; Wu, H Y (Peking U., SKLNPT ; Beijing, Inst. Atomic Energy) ; Andreyev, A N (York U., England ; Jefferson Lab ; JAEA, Ibaraki) ; Seweryniak, D (Argonne, PHY) ; Andel, B (Comenius U. ; KU Leuven, Dept. Phys. Astron.) ; Antalic, S (Comenius U.) ; Barzakh, A E (St. Petersburg, INP) ; Block, M (Helmholtz Inst., Mainz ; Darmstadt, GSI ; Mainz U.) ; Bronis, A (Comenius U.) ; Carpenter, M P (Argonne, PHY) ; Copp, P (Argonne, PHY) ; Cubiss, J G (York U., England ; Jefferson Lab) ; Doherty, D T (Surrey U.) ; Van Duppen, P (KU Leuven, Dept. Phys. Astron.) ; Favier, Z (CERN) ; Giacoppo, F (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Kindler, B (Darmstadt, GSI) ; Kondev, F G (Argonne, PHY) ; Lauritsen, T (Argonne, PHY) ; Li, X Q (Peking U., SKLNPT) ; Lommel, B (Darmstadt, GSI) ; Al Monthery, M (York U., England ; Jefferson Lab) ; Mošaˇt, P (Comenius U.) ; Ni, L (Peking U., SKLNPT) ; Raison, C (York U., England ; Jefferson Lab) ; Reviol, W (Argonne, PHY) ; Savard, G (Argonne, PHY) ; Stolze, S (Argonne, PHY) ; Wilson, G L (Louisiana State U., Math. Dept.) ; Xu, C (Peking U., SKLNPT) ; Zhang, J Z (Peking U., SKLNPT) ; Zhang, S Y (Peking U., SKLNPT) ; Zhou, Z X (Peking U., SKLNPT)
Publication 2024
Number of pages 10
In: Eur. Phys. J. A 60 (2024) 165
DOI 10.1140/epja/s10050-024-01395-3
Subject category Nuclear Physics - Experiment
Abstract The prompt and delayed $\gamma $-ray spectra of $^{187}$Tl was studied via the $^{142}$Nd($^{50}$Cr, 3p2n)$^{187}$Tl fusion-evaporation reaction at a beam energy of 255 MeV. An enhanced level scheme of $^{187}$Tl was established. The collective bands with one-quasiparticle configurations from the $2f_{7/2}$, $1h_{9/2}$, $1h_{11/2}$ and $1i_{13/2}$ orbitals and high-lying structures with possible three-quasiparticle configurations are investigated in terms of the tilted axis cranking covariant density functional theory. At low excitation energy, the rotational bands with one-quasiparticle configurations reflect coexistence of three shapes: prolate, triaxial, and oblate. The possible shapes of two microsecond isomers at high excitation energy are proposed.
Copyright/License © 2024 The Author(s) (License: exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany)

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