NEW DATA ON CROSS SECTIONS FOR PATIAL (γ,n) AND (γ,2n) AND TOTAL (γ,sn) PHOTONEUTRON REACTIONS FOR Sn-112,-114,-116,-117,-118,-119,-120,-122,-124

Authors & Affiliations

Varlamov V.V., Ishkhanov B.S., Orlin V.N., Chetvertkova V.А.
D. V. Skobeltsyn Institute of Nuclear Physics (SINP) of the Moscow State University, Russia


For 9 tin isotopes the combined analysis was carried out for experimental data for cross sections of total and partial photoneutron reactions obtained at MSU SINP using bremsstrahlung and at Livermore (USA) and Saclay (France) using quasimonoenergetic photons obtained at annihilation of relativistic positrons. The systematic disagreements between the various experiments data were analyzed and the method for their taking into account was carried out. Using the various experiments data for total photoneutron yield reaction cross sections σ(γ,xn) and the modern model of photonuclear reaction based on the Fermi gas densities equations the evaluated data for σ(γ,n) and σ(γ,2n) reaction cross sections were obtained. With those the total photoneutron reaction cross sections σ(γ,sn) were evaluated for all Sn isotopes under discussion, the regularities of the giant dipole resonance main parameters were analyzed in dependence of their mass number A.

Key words
tin isotopes, total photoneutron reaction, partial photoneutron reaction, quasimonoenergetic photons, total photoneutron yield reaction cross sections, the giant dipole resonance, Sn

Article Text (in Russian, PDF)


UDC 539.17

Problems of Atomic Science and Technology. Series: Nuclear Constants, issue 1-2, 2010