Benouaret, N. and Schwengner, R. and Massarczyk, R. and Shizuma, T. (2024) Dipole excitations in open shell nuclides near the neutron threshold energy from (γ,γ′) experiments: The case of Ge isotopes. Il nuovo cimento C, 47 (2). pp. 1-5. ISSN 1826-9885
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Abstract
The dipole response of the open-shell nuclide 70Ge has been inves- ′ tigated in high-resolution (γ,γ ) experiments using bremsstrahlung produced with electron beams of energies of 8.5 and 14.7 MeV at the linear accelerator ELBE. A resonance-like structure of levels mostly with spin J = 1 has been identified, dis- tributed between 5 MeV up to neutron separation energy Sn as in the case of 76Ge and in contast to 74Ge where the level density is lower and ceases abruptly at about 1 MeV below Sn. The distibution strength was complemented by the unresolved levels using simulations of statistical γ-ray cascades, corrected by estimations of branching transitions. The summed strength in 70Ge, completed by the data from 74,76Ge do not fit with a linear trend as function of the neutron excess. Such unex- pected behaviour might be related to the nuclear deformation which seems to play the major role in the moderately deformed Germanium isotopic chain.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 20 May 2024 14:17 |
| Last Modified: | 20 May 2024 14:17 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/22882 |
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