Cross sections for the production of Pa, Th, and Ac isotopes in the decaysof highly excited compound nuclei Pa-221,Pa- 223,Pa- 225,Pa- 227 formed inreactions featuring Ne-20,Ne-22 and Mg-24,Mg- 26 ions

Citation
Dd. Bogdanov et al., Cross sections for the production of Pa, Th, and Ac isotopes in the decaysof highly excited compound nuclei Pa-221,Pa- 223,Pa- 225,Pa- 227 formed inreactions featuring Ne-20,Ne-22 and Mg-24,Mg- 26 ions, PHYS ATOM N, 62(11), 1999, pp. 1794-1802
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF ATOMIC NUCLEI
ISSN journal
1063-7788 → ACNP
Volume
62
Issue
11
Year of publication
1999
Pages
1794 - 1802
Database
ISI
SICI code
1063-7788(199911)62:11<1794:CSFTPO>2.0.ZU;2-3
Abstract
The production cross sections and excitation functions have been measured f or neutron-deficient isotopes Pa, Th, and Ac featuring 122 to 132 neutrons and originating from Ne-20,Ne- 22 + Tl-295 and Mg-24,Mg- 26 + Au-197 intera ctions. The resulting cross sections have been compared with the prediction s of the statistical model of compound-nucleus deexcitation. It has been sh own that none of the methods widely used to take into account the impact of shell effects on the cross sections for the production of evaporation prod ucts is able to describe consistently the entire body of experimental data. Various approaches that take into account shell effects semiempirically an d which make it possible to describe the array of data obtained in the pres ent experiment have been considered.