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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.
Physical review letters, 11/2021, Letnik: 127, Številka: 19Journal Article
The changes in the mean-square charge radius (relative to 209Bi), magnetic dipole, and electric quadrupole moments of 187, 188, 189, 191Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in 187, 188, 189Big, manifested by a sharp radius increase for the ground state of 188Bi relative to the neighboring 187, 189Big. A large isomer shift was also observed for 188Bim. 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.
