0101862 - UJF-V 20043045 RIV CZ eng J - Journal Article
Karamian, S. A. - Adam, Jindřich
Estimation of the spallation-residue angular momentum in p+Ta, Re reactions.
[Odhad úhlového momentu spalačních reziduí v p+Ta, Re reakcích.]
Czechoslovak Journal of Physics. Roč. 53, - (2003), B381-B394. ISSN 0011-4626
R&D Projects: GA MŠMT(CZ) ME 134
Keywords : protons * spallation * radionuclides
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 0.263, year: 2003

Yields and cross-sections for the radioactive isotope production have been, determined via gamma-activity measurements after irradiation of the Ta and Re targets by protons with energies from 100 to 660 MeV. Mass-distribution of the reaction products contains two wide peaks corresponded to the spallation and fission product nuclei, respectively. High-spin Hf and Lu isomers are among the detected nuclides. The spallation-residue angular momentum, I, has been estimated basing on the determined isomer-to-ground state ratio, sigma(m)/sigma(g), and using, known systematics of sigma(m)/sigma(g), versus I. Non zero value of spin I should increase a probability of fission. Measured fission-to-spallation ratio is indeed higher than predicted by the Monte Carlo code simulation without angular momenta in account.

Výtěžky a účinné průřezy produkce radioaktivních izotopů jsou určovány prostřednictvím gama aktivačních měření po ozáření terčíků Ta a Re protony s energiemi od 100 do 660 MeV.
Permanent Link: http://hdl.handle.net/11104/0000083