Details

Autor(en) / Beteiligte

• Spagnoletti, P.
• Simpson, G.
• Kisyov, S.
• Bucurescu, D.
• Régis, J.-M.
• Saed-Samii, N.
• Blanc, A.
• Jentschel, M.
• Köster, U.
• Mutti, P.
• Soldner, T.
• de France, G.
• Ur, C. A.
• Urban, W.
• Bruce, A. M.
• Bernards, C.
• Drouet, F.
• Fraile, L. M.
• Gaffney, L. P.
• Ghită, D. G.
• Ilieva, S.
• Jolie, J.
• Korten, W.
• Kröll, T.
• Lalkovski, S.
• Larijarni, C.
• Lică, R.
• Mach, H.
• Mărginean, N.
• Paziy, V.
• Podolyák, Zs
• Regan, P. H.
• Scheck, M.
• Smith, J. F.
• Thiamova, G.
• Townsley, C.
• Vancraeyenest, A.
• Vedia, V.
• Warr, N.
• Werner, V.
• Zielińska, M.

Titel

Lifetimes and shape-coexisting states of Zr 99

Ist Teil von

• Physical review. C, 2019-07, Vol.100 (1), Article 014311

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Lifetimes of intermediate-spin states in two rotational bands of 99Zr have been measured. These states were populated following the neutron-induced fission of 235U at the PF1B beamline of the Institut Laue-Langevin, Grenoble, during the EXILL-FATIMA campaign. The nucleus 99Zr59 exhibits shape coexistence and lies precisely on the border of an abrupt change in ground-state deformation when going from N = 58 to N = 60, making its study interesting for understanding the mechanisms involved in the rapid onset of deformation here. The B(E2) values extracted for decays in the ν3/2[541] band allow quadrupole deformations of β2 = 0.34(1) and 0.26(3) to be determined for the 821.6- and 1236.6-keV members, whereas β2 = 0.32(3) was found for the 850.5-keV member of the ν3/2[411] band. Some of the excited states known in 99Zr have been reasonably described with interacting boson-fermion model (IBFM) calculations. In conclusion, Type-II shell evolution is proposed to play a major role in modifying single-particle energies in 99Zr.