| Autor: |
Olaf Scholten, Z. Sujkowski, J.F.W. Jansen, M.J.A. de Voigt, D. Chmielewska |
| Přispěvatelé: |
Research unit Astroparticle Physics |
| Rok vydání: |
1977 |
| Předmět: |
|
| Zdroj: |
Nuclear Physics A, 291, 365-385. ELSEVIER SCIENCE BV |
| ISSN: |
0375-9474 |
| DOI: |
10.1016/0375-9474(77)90326-8 |
| Popis: |
The 150Nd(α, 4n) reaction at Eα = 45 MeV has been used to study high spin states in the 15062Sm88 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 h 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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