Studies of Neutron-Deficient Nuclei Near the Z = 82 Shell Closure via Cold Fusion Reactions

Journal Article · Wed Mar 04 00:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3108861· OSTI ID:21289488

Carpenter, M P; Kondev, F G; Janssens, R V. F.; Seweryniak, D; Khoo, T L; Lauritsen, T; Lister, C J; Zhu, S ^[1]; Camera, F; Bracco, A; Million, B; Leoni, S ^[2]; Jenkins, D G; Wadsworth, R ^[3]

---

1. Argonne National Laboratory, 9700 South Cass Ave., Argonne, IL 60439 (United States)
2. University of Milano and INFN, Milano Italy (Italy)
3. Department of Physics, University of York, York YO10 5DD (United Kingdom)

Over the last decade, we have performed in-beam experiments using Gammasphere+FMA to measure excited states in proton-rich Au, Hg, Tl and Pb isotopes. In these studies, the use of the FMA is essential in order to differentiate evaporation residues from the large fission background which dominates the reaction cross-section. In addition, we have found that using near-symmetric reactions at bombarding energies near the Coloumb barrier is beneficial in performing these studies. By keeping the bombarding energy low, fission is minimized and the reaction products are concentrated in only a few channels. New results have recently been obtained using the {sup 90}Zr+{sup 92}Mo reaction to study shape co-existence in {sup 181}Tl via the lp evaporation channel. In addition, we have measured the total {gamma}-ray energy and multiplicity associated with the surviving compound system, {sup 179}Au, following the fusion reaction, {sup 90}Zr+{sup 89}Y.

• OSTI ID: 21289488
• Journal Information: AIP Conference Proceedings, Vol. 1098, Issue 1; Conference: FUSION08: International conference on new aspects of heavy ion collisions near the Coulomb barrier, Chicago, IL (United States), 22-26 Sep 2008; Other Information: DOI: 10.1063/1.3108861; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPOUND NUCLEI
CROSS SECTIONS
EVAPORATION MODEL
EXCITED STATES
GAMMA SPECTROSCOPY
GE SEMICONDUCTOR DETECTORS
GOLD 179
HEAVY ION FUSION REACTIONS
MOLYBDENUM 92 TARGET
MULTIPLICITY
NEUTRON-DEFICIENT ISOTOPES
NUCLEAR STRUCTURE
THALLIUM 181
YTTRIUM 89 TARGET
ZIRCONIUM 90 REACTIONS