Cross Section Measurements and Theoretical Study of the ^174,176Hf(n,2n)^173,175Hf Reactions

Experimental cross section measurements for the 176 Hf(n,2n) 175 Hf and 174 173 reactions were carried out, using activation technique. The neutron beam energy in range of 15.3-20.3 MeV was produced via 3 H(d,n) 4 He reaction at 5.5 Tandem Van de Graaf accelerator laboratory NCSR “Demokritos”. A thin metallic foil natural used, while determination flux target position, reference foils Al placed front back target. irradiations continuous ~24-48 hours, leading to a total fluence 10 -10 11 n/cm 2 BF detector used monitoring during irradiations. After end each irradiation, activity measured off-line by two HPGe detectors. has been corrected contribution 177 Hf(n,3n) Hf(n,γ) reactions. Statistical model calculations based on Hauser-Feshbach theory have also performed EMPIRE 3.2.3 code. predictions compared with data present work as well from literature.