Using the activation technique (p,n)-reaction cross sections of the tin isotopes with A=115, 116 and 120, the first of which is a p-process isotope, have been measured in the proton energy range between 4.5 and 9.0 MeV, corresponding to stellar temperatures T9 > 3. Thin selfsupporting foils of enriched tin isotopes were irradiated at the Kharkiv linear accelerator with proton beam intensities of (100...150) nA. The induced activities were measured with a calibrated Ge(Li)-detector. The cross sections for the production of isomeric states in 116Sb (Jm=8-, Jg=3+) and 120Sb (Jm=8-, Jg=1+) were determined separately. The total cross sections of the 120Sn(p,n)120Sb reaction are compared with the results of other authors obtained with the neutron counting technique in this incident proton energy range. The cross sections, astrophysical S-factors, and reaction rates derived from the experiment are compared with Hauser-Feshbach statistical theory predictions. In general, good agreement is found.
|Journal||Proceedings of Science|
|Publication status||Published - 2006|
|Event||9th International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, NIC 2006 - Geneva, Switzerland|
Duration: 25 Jun 2006 → 30 Jun 2006