Abstract
The 150Nd(α, 4n) reaction at Eα = 45
MeV has been used to study high spin states in the
15062Sm 88 nucleide. The experiments
comprised measurements of singles γ-ray and conversion electron
spectra, γ-ray angular distributions, three-parameter (
Eα- Eα- t) coincidences and a
γ-ray anti-Compton spectrum. Predominantly populated were the
ground-state band (g.s.b.) extending to Jπ = 12
+ and tentatively to 16 + and a negative-parity
odd spin band (n.p.b.) extending from Jπ = 5 -
through 15 - and tentatively to 19 -. The bands
are interpreted in the framework of the interacting boson approximation
model with a Hamiltonian appropriate for a transitional nucleus, far
away from either the rotational or vibrational limit. It is found that
the model gives a very satisfactory description of the energies of the
two bands observed as well as of the branching ratios of the intra- and
inter-band transitions. The gentle backbending of the
{2ℷ}/{h̷}2 versus (ħω) 2
curve for g.s.b. above Jπ = 10 + is reproduced
in the calculation without making use of the band-crossing concept. The
absolute reaction cross sections have been determined at 45 MeV
bombarding energy to be σtot = 1380 ± 170 mb and
σ4n = 800 ± 100 mb.
Original language | English |
---|---|
Pages (from-to) | 365-385 |
Journal | Nuclear Physics A |
Volume | 291 |
Publication status | Published - 1-Nov-1977 |