Collective structures up to spin ˜ 65 in the N = 90 isotones ^158Er and ^157Ho

Details Collective structures up to spin ˜ 65 in the N = 90 isotones ^158Er and ^157Ho Collective structures up to spin ˜ 65 in the N = 90 isotones ^158Er and ^157Ho

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprg11003w&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #G11.003

Physics

Scientific paper

Stable asymmetric or triaxial shapes are a longstanding prediction of theory [1]. In the present work, a third collective band in ^158Er at spins beyond band termination was found in addition to the two previously reported ones [2]. The measured transition quadrupole moments (Qt ˜ 10-11eb) have suggested that these bands possess a triaxial strongly deformed shape, based on comparisons with CNS calculations and with TAC calculations using the SHF model [3]. Three new collective bands with similar characters, tentatively assigned to ^157Ho, will also be presented. [1] A. Bohr and B. R. Mottelson, Nuclear Structure, vol. II (1975); [2] E. S. Paul et al., Phys. Rev. Lett. 98, 012501 (2007); [3] Y. Shi et al., in preparation.

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