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Investigation of high-K states in No-252

Abstract : In this paper we investigate the rotational band built upon a two-quasiparticle 8(-) isomeric state of No-252 up to spin I-pi = 22(-). The excited states of the band were populated with the Pb-206(Ca-48, 2n) fusion-evaporation reaction. An unambiguous assignment of the structure of the 8(-) isomer as a 7/2(+)[624](nu) circle times 9/2(-)[734](nu) configuration has been made on the basis of purely experimental data. Comparisons with triaxial self-consistent Hartree-Fock-Bogoliubov calculations using the D1S force and breaking time-reversal as well as z-signature symmetries are performed. These predictions are in agreement with present measurements. Mean-field calculations extended to similar states in Fm-250 support the interpretation of the same two-neutron quasiparticle structure as the bandhead in both N = 150 isotones.
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http://hal.in2p3.fr/in2p3-00773540
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Submitted on : Tuesday, January 15, 2013 - 4:53:15 PM
Last modification on : Thursday, November 19, 2020 - 10:52:02 AM

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B. Sulignano, C. Theisen, J. P. Delaroche, M. Girod, J. Ljungvall, et al.. Investigation of high-K states in No-252. Physical Review C, American Physical Society, 2012, 86, pp.044318. ⟨10.1103/PhysRevC.86.044318⟩. ⟨in2p3-00773540⟩

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