Rapid increase in prescission GDR {gamma}-ray emission with energy
- Argonne National Lab., IL (United States)
- State Univ. of New York, Stony Brook, NY (United States). Dept. of Physics
A rapid increase in the emission of prescission giant dipole resonance (GDR) {gamma}-rays with bombarding energy is observed in excited Th and Cf nuclei formed in the reactions {sup 16}O+{sup 20B}Pb and {sup 32}S+{sup nat}W,{sup 208}Pb. This increase begins around E{sub exc} = 40 MeV for the {sup 16}O+{sup 208}Pb reaction and E{sub exc} = 70 MeV for the {sup 32}S-induced reactions. The excess {gamma}-ray yield above these thresholds cannot be described within the standard statistical model. Statistical model calculations which include a temperature dependent nuclear dissipation are able to reproduce simultaneously the observed GDR {gamma}-ray spectra and recently measured evaporation residue across sections.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 192520
- Report Number(s):
- ANL/PHY/CP-87651; CONF-9506131-1; ON: DE96004821; TRN: 96:006215
- Resource Relation:
- Conference: Groningen nuclear physics conference on giant resonances, Groningen (Netherlands), 28 Jun - 1 Jul 1995; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Time scales for fusion-fission and quasifission from giant dipole resonance decay
Giant dipole resonance decay from fusion-fission and quasifission of hot thorium nuclei