Journal Article

GSI-2025-01006

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Charge radii and electromagnetic moments of $^{214 − 218}$Bi : Exploring the “southern” border of the Z > 82 octupole-deformation region

Barzakh, A. (Corresponding author) ; Andreyev, A. N. (Corresponding author) ; Yue, Z. ; Nies, L. ; Seliverstov, M. D. ; Cubiss, J. G. ; Algora, A. ; Andel, B. ; Antalic, S. ; Al Monthery, M. ; Atanasov, D. ; Benito, J. ; Benzoni, G. ; Berry, T. ; Bissell, M. L. ; Blaum, K. ; Borge, M. J. G. ; Chrysalidis, K. ; Clisu, C. ; Cocolios, T. E. ; Costache, C. ; Goodacre, T. D. ; Farooq-Smith, G. J. ; Fedorov, D. V. ; Fedosseev, V. N. ; Fraile, L. M. ; Fynbo, H. O. U. ; Gadelshin, V. ; Gaffney, L. P. ; Garcia Ruiz, R. F. ; Granados, C. ; Greenlees, P. T. ; Harding, R. D. ; Harkness-Brennan, L. J. ; Heinke, R. ; Herlert, A.GSI* ; Huyse, M. ; Illana, A. ; Jolie, J. ; Judson, D. S. ; Karls, J. ; Konki, J. ; Larmonier, P. ; Lazarus, I. ; Leimbach, D. ; Lică, R. ; Liu, Z. ; Lunney, D. ; Lynch, K. M. ; Madurga, M. ; Manea, V. ; Marginean, N. ; Marginean, R. ; Marsh, B. A. ; Mihai, C. ; Molkanov, P. ; Mosat, P. ; Mougeot, M. ; Murias, J. R. ; Nacher, E. ; Negret, A. ; Neidherr, D.GSI* ; Page, R. D. ; Pascu, S. ; Perea, A. ; Pucknell, V. ; Rahkila, P. ; Raison, C. ; Rapisarda, E. ; Rezynkina, K. ; Rosenbush, M. ; Rossel, R. E. ; Rothe, S. ; Sánchez-Tembleque, V. ; Schomacker, K. ; Schweikhard, L. ; Seiffert, C. ; Sels, S. ; Sotty, C. ; Stan, L. ; Stryjczyk, M. ; Studer, D. ; Sundberg, J. ; Sürder, C. ; Tengblad, O. ; Van Duppen, P. ; Vedia, V. ; Verlinde, M. ; Viñals, S. ; Warr, N. ; Welker, A. ; Wienholtz, F. ; Wolf, R. N.

2025
Inst. Woodbury, NY

Please use a persistent id in citations: doi:10.1103/sltw-g4d6  doi:10.15120/GSI-2025-01006

Abstract: The changes in the mean-squared charge radii relative to 209Bi126(𝛿⁢⟨𝑟2⟩𝑁,126) and the magnetic dipole and electric quadrupole moments in 214−218Bihave been measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). Magnetic moments of odd-odd bismuth nuclei have been analyzed by the additivity relation. Previous tentative spin-parity and configuration assignments based on the 𝛽-decay feeding patterns have been supported. A normal odd-even staggering in charge radii of bismuth isotopes with 𝑁>126has been observed. The new data for the 𝛿⁡⟨𝑟2⟩of bismuth isotopes allow a study of the isotonic dependencies in the charge radii, revealing jumps in 𝛿⁢⟨𝑟2⟩132,126and 𝛿⁢⟨𝑟2⟩134,126at 𝑍=84. This pattern could be explained by a sudden onset of octupole deformation at 𝑁=132and 134 when going from polonium (𝑍=84) to astatine (𝑍=85).

Note: "Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by CERN."

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Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. ENSAR2 - European Nuclear Science and Application Research 2 (654002) (654002)

Experiment(s):

1. External experiment at external facility/ no experiment at GSI (other)

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