The GDR in Hg and Eu nuclei from selected decay chains

Citation
F. Camera et al., The GDR in Hg and Eu nuclei from selected decay chains, NUCL PHYS A, 649, 1999, pp. 115C-122C
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS A
ISSN journal
0375-9474 → ACNP
Volume
649
Year of publication
1999
Pages
115C - 122C
Database
ISI
SICI code
0375-9474(19990328)649:<115C:TGIHAE>2.0.ZU;2-8
Abstract
The gamma-decay of the GDR in hot Hg and Eu isotopes has been measured in c oincidence with selected low-energy gamma-transitions of the evaporation re sidues. In the Hg ease, the GDR width at finite temperature and at different spins was studied by analyzing simultaneously with the statistical model the high -energy gamma-ray spectra associated with different residual nuclei and the fractions of residue cross-sections. The measured GDR width was found in g ood agreement with the predictions of the thermal fluctuations model. In the case of Eu, we have measured the high-energy gamma-rays in coinciden ce with low-energy gamma-transitions from different nuclear configurations of Eu-143;, order to search for the GDR decay built on a superdeformed stat e. The analysis of the data shows a possible evidence of this state. The me asured intensity indicates that the superdeformation survives only few MeV above the yrast line.