A study of the rotational side-bands in 162Dy |
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Authors: | CA Fields KH Hicks RA Ristinen FWN De Boer PM Walker J Borggreen LK Peker |
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Institution: | 1. Nuclear Physics Laboratory, Department of Physics, University of Colorado, Boulder, Colorado 80309, USA;4. Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA |
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Abstract: | Rotational side-bands in 162Dy have been studied using the 160Gd(α, 2nγ)162Dy reaction. Seven side-bands are observed, with Kπ = 2+, 2?, (0)?, 0+, 5?, 4+ and (6?). Four of these bands have collective structure at low spin: the Kπ = 2+γ-vibrational band, the Kπ = 0+β-vibrational band, and the Kπ = 2? and (0)? octupole vibrational bands. Of the remaining bands, the 4+ band is deformation coupled while the 5? and (6?) bands are rotation-aligned. Several bandcrossings are observed in this nucleus. The β and γ-bands are crossed at , respectively, by a highly aligned ()2 S-band; extrapolation of this S-band to higher spin suggests that it crosses the g.s.b. between . The 2? octupole band is crossed by the 5? band at and again by the (6?) band at . The latter bandcrossings are discussed in terms of two-quasiparticle plus rotor calculations. |
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Keywords: | Nuclear reactions |
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