Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.014612· OSTI ID:20698842

Andreyev, A N ^[1]; Ackermann, D; Muenzenberg, G ^[2]; Antalic, S; Saro, S; Streicher, B ^[3]; Darby, I G; Page, R D; Wiseman, D R ^[4]; Franchoo, S ^[5]; Hessberger, F P; Kuusiniemi, P; Lommel, B; Kindler, B; Mann, R; Sulignano, B ^[2]; Hofmann, S ^[2]; Huyse, M; Vel, K van de; Duppen, P van ^[6]

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1. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3 (Canada)
2. Gesellschaft fur Schwerionenforschung (GSI), Planckstrasse 1, D-64291 Darmstadt (Germany)
3. Department of Nuclear Physics, Comenius University, Bratislava (Slovakia)
4. Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
5. Institut fuer Physik, Johannes Gutenberg-Universitaet, Staudingerweg 7, D-55099 Mainz (Germany)
6. Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven (Belgium)

The production of the very neutron-deficient nuclides {sup 184-192}Bi and {sup 186-192}Po in the vicinity of the neutron midshell at N = 104 has been studied by using heavy-ion-induced complete fusion reactions in a series of experiments at the velocity filter SHIP. The cross sections for the xn and pxn evaporation channels of the {sup 46}Ti+{sup 144}Sm{yields}{sup 190}Po*,{sup 98}Mo+{sup 92}Mo{yields}{sup 190}Po*,{sup 50,52}Cr+{sup 142}Nd{yields}{sup 192,194}Po*, and {sup 94,95}Mo+{sup 93}Nb{yields}{sup 187,188}Bi* reactions were measured. The results obtained, together with the previously known cross section data for the heavier Bi and Po nuclides, are compared with the results of statistical model calculations carried out with the HIVAP code. It is shown that a satisfactory description of the experimental data requires a significant (up to 35%) reduction of the theoretical fission barriers. The optimal reactions for production of the lightest Bi and Po isotopes are discussed.

• OSTI ID: 20698842
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 72, Issue 1; Other Information: DOI: 10.1103/PhysRevC.72.014612; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BISMUTH 186
BISMUTH 188
BISMUTH 189
BISMUTH 192
CHROMIUM 52 REACTIONS
CROSS SECTIONS
FISSION BARRIER
MOLYBDENUM 92 TARGET
MOLYBDENUM 95
MOLYBDENUM 98 REACTIONS
NEODYMIUM 142 TARGET
POLONIUM 188
POLONIUM 190
POLONIUM 192
SAMARIUM 144 TARGET
STATISTICAL MODELS
TITANIUM 46 REACTIONS