GIANT-DIPOLE RESONANCE IN EXCITED SN-120 AND PB-208 NUCLEI POPULATED BY INELASTIC ALPHA-SCATTERING

Authors
RAMAKRISHNAN E BAUMANN T AZHARI A KRYGER RA PFAFF R THOENNESSEN M YOKOYAMA S BEENE JR HALBERT ML MUELLER PE STRACENER DW VARNER RL VANBUREN G CHARITY RJ DEMPSEY JF HUA PF SARANTITES DG SOBOTKA LG
Citation
E. Ramakrishnan et al., GIANT-DIPOLE RESONANCE IN EXCITED SN-120 AND PB-208 NUCLEI POPULATED BY INELASTIC ALPHA-SCATTERING, Nuclear physics. A, 599(1-2), 1996, pp. 49-55
Citations number
16
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. A → ACNP
ISSN journal
03759474
Volume
599
Issue
1-2
Year of publication
1996
Pages
49 - 55
Database
ISI
SICI code
0375-9474(1996)599:1-2<49:GRIESA>2.0.ZU;2-V
Abstract
The evolution of the giant dipole resonance (GDR) in hob Sn-120 and Pb -208 nuclei was studied by measuring high energy gamma-rays from the d ecay of the resonance. The excited nuclei were populated by inelastic scattering of alpha-particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase systematically with excitation energy i n both systems. Inelastic scattering populates low angular momentum st ates in the target. The observed width increase is thus attributed to fluctuations iii the nuclear shape induced by temperature.