Large Shape Staggering in Neutron-Deficient Bi Isotopes

The changes in the mean-square charge radius (relative to $^{209}$Bi), magnetic dipole, and electric quadrupole moments of $^{187,188,189,191}$Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in $^{187,188,189}$B...

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Detalles Bibliográficos
Autores principales: Barzakh, A, Andreyev, A N, Raison, C, Cubiss, J G, Van Duppen, P, Péru, S, Hilaire, S, Goriely, S, Andel, B, Antalic, S, Al Monthery, M, Berengut, J C, Bieroń, J, Bissell, M L, Borschevsky, A, Chrysalidis, K, Cocolios, T E, Day Goodacre, T, Dognon, J -P, Elantkowska, M, Eliav, E, Farooq-Smith, G J, Fedorov, D V, Fedosseev, V N, Gaffney, L P, Garcia Ruiz, R F, Godefroid, M, Granados, C, Harding, R D, Heinke, R, Huyse, M, Karls, J, Larmonier, P, Li, J G, Lynch, K M, Maison, D E, Marsh, B A, Molkanov, P, Mosat, P, Oleynichenko, A V, Panteleev, V, Pyykkö, P, Reitsma, M L, Rezynkina, K, Rossel, R E, Rothe, S, Ruczkowski, J, Schiffmann, S, Seiffert, C, Seliverstov, M D, Sels, S, Skripnikov, L V, Stryjczyk, M, Studer, D, Verlinde, M, Wilman, S, Zaitsevskii, A V
Lenguaje:eng
Publicado: 2021
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.127.192501
http://cds.cern.ch/record/2790639
Descripción
Sumario:The changes in the mean-square charge radius (relative to $^{209}$Bi), magnetic dipole, and electric quadrupole moments of $^{187,188,189,191}$Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in $^{187,188,189}$Big, manifested by a sharp radius increase for the ground state of $^{188}$Bi relative to the neighboring $^{187,189}$Big. A large isomer shift was also observed for $^{188}$Bi$^m$. Both effects happen at the same neutron number, $N = 105$, where the shape staggering and a similar isomer shift were observed in the mercury isotopes. Experimental results are reproduced by mean-field calculations where the ground or isomeric states were identified by the blocked quasiparticle configuration compatible with the observed spin, parity, and magnetic moment.

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