https://doi.org/10.1140/epja/i2015-15067-2
Regular Article - Experimental Physics
Multinucleon photonuclear reactions on 209Bi: Experiment and evaluation
1
Department of Physics, Lomonosov Moscow State University, 119991, Moscow, Russia
2
Extreme Light Infrastructure - Nuclear Physics/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 077125, Bucharest-Magurele, Romania
3
Faculty of Physics, University of Bucharest, 077125, Bucharest-Magurele, Romania
4
Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, 119991, Moscow, Russia
* e-mail: hatta@depni.sinp.msu.ru
Received:
23
January
2015
Revised:
15
April
2015
Accepted:
6
May
2015
Published online:
11
June
2015
Photon activation technique using bremsstrahlug with end-point energy 55.6 MeV is used to induce photonuclear reactions in a 209Bi target. Absolute yields and integrated cross sections of multiparticle reactions (γ, 2n-6n), (γ, 4n1p), and (γ, 5n1p) are obtained. The results are compared to predictions of statistical models using systematical and microscopic description of photoabsorption and to the result of evaluation of the partial photoneutron reaction cross sections. Based on a comparison with existing experimental photoneutron cross sections and model calculations, we make a conclusion that neutron multiplicity assignment in available photoneutron cross sections on 209Bi can be corrected and evaluated cross sections of (γ, 1n) and (γ, 2n) are obtained that are in an agreement with the obtained experimental results.
© SIF, Springer-Verlag Berlin Heidelberg, 2015
