The population of deformed bands in Cr-48 by emission of Be-8 from the S-32+Mg-24 reaction

Citation
S. Thummerer et al., The population of deformed bands in Cr-48 by emission of Be-8 from the S-32+Mg-24 reaction, J PHYS G-NU, 27(7), 2001, pp. 1405-1420
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
ISSN journal
0954-3899 → ACNP
Volume
27
Issue
7
Year of publication
2001
Pages
1405 - 1420
Database
ISI
SICI code
0954-3899(200107)27:7<1405:TPODBI>2.0.ZU;2-3
Abstract
Using particle-gamma coincidences we have studied the population of final s tates after the emission of two a-particles and of Be-8 in nuclei formed in S-32 + Mg-24 reactions at an energy of E-L (S-32) = 130 MeV. The data were obtained in a set-up consisting of the GASP gamma -ray detection array and the multidetector array ISIS. Particle identification is obtained from the DeltaE and E signals of the ISIS silicon detector telescopes, with the 8Be being identified by the instantaneous 'pile up' of the DeltaE and E pulses . gamma -ray decays of the Cr-48 nucleus are identified with coincidences s et on two a-particles and on Be-8. Some transitions of the side-band with K -pi = 4(-) show a stronger population for Be-8 emission relative to that of two alpha -particles (by a factor of 1.5-1.8). This observation is interpr eted as being due to enhanced emission of Be-8 into a more deformed nucleus . Calculations based on the extended Hauser-Feshbach compound decay formali sm confirm this observation quantitatively.