학술논문
Early onset of ground-state deformation in the neutron-deficient polonium isotopes
Document Type
Working Paper
Author
Cocolios, T. E.; Dexters, W.; Seliverstov, M. D.; Andreyev, A. N.; Antalic, S.; Barzakh, A. E.; Bastin, B.; Buscher, J.; Darby, I. G.; Fedorov, D. V.; Fedosseyev, V. N.; Flanagan, K. T.; Franchoo, S.; Fritzsche, S.; Huber, G.; Huyse, M.; Keupers, M.; Koster, U.; Kudryavtsev, Yu.; Mane, E.; Marsh, B. A.; Molkanov, P. L.; Page, R. D.; Sjoedin, A. M.; Stefan, I.; Van de Walle, J.; Van Duppen, P.; Venhart, M.; Zemlyanoy, S. G.; Bender, M.; Heenen, P. -H.
Source
Subject
Language
Abstract
In-source resonant ionization laser spectroscopy of the even-$A$ polonium isotopes $^{192-210,216,218}$Po has been performed using the $6p^37s$ $^5S_2$ to $6p^37p$ $^5P_2$ ($\lambda=843.38$ nm) transition in the polonium atom (Po-I) at the CERN ISOLDE facility. The comparison of the measured isotope shifts in $^{200-210}$Po with a previous data set allows to test for the first time recent large-scale atomic calculations that are essential to extract the changes in the mean-square charge radius of the atomic nucleus. When going to lighter masses, a surprisingly large and early departure from sphericity is observed, which is only partly reproduced by Beyond Mean Field calculations.
Comment: As submitted to PRL
Comment: As submitted to PRL