Properties of GD-152 collective states

0185907 - UJF-V 20033223 RIV US eng J - Článek v odborném periodiku
Adam, Jindřich - Honusek, Milan - Dobeš, Jan - Kalinnikov, V. G. - Mrázek, Jaromír - Pronskikh, V. S. - Čaloun, Pavel - Lebeděv, NA. - Stegailov, V. I. - Tsoupko-Sitnikov, V. M.
Properties of GD-152 collective states.
European Physical Journal A. Roč. 18, č. 4 (2003), s. 605-626. ISSN 1434-6001. E-ISSN 1434-601X
Výzkumný záměr: CEZ:AV0Z1048901
Klíčová slova: interacting boson model * multipole-mixing ratios * negative parity states
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 2.097, rok: 2003

The decays of Tb-152 (T-1/2 = 17.5 h) and Gd-152 excited states have been investigated by the analysis of gamma-rays and gammagamma-coincidences measured with the use of high-resolution HPGe detectors. The source of Tb-152 was prepared by chromatographic isolation followed by electromagnetic separation from a tantalum target irradiated by an internal proton beam of the LNP JINR phasotron. New and more precise data on the gamma-transitions and excited states of Gd-152 are reported. Using previously published data on internal-conversion electrons many transition multipolarities are suggested, some of them with E0 admixture. The EC/beta(+) ratio was found for a number of low-lying levels, for most of the levels their spins, parities, and log ft are given. The excited levels of Gd-152 were deduced from the analysis of gammagamma-coincidences. The experimental level energies and reduced transition probabilities are compared with the calculations by phenomenological formulae as well as in the frameworks of theoretical models.
Trvalý link: http://hdl.handle.net/11104/0082258