A study of non-elastic reaction rates for the ADS materials in the environment of spallation neutrons produced by 1.6 GeV d-beam.

Abstract For the design and modeling of Accelerator Driven sub-critical System (ADS) a detailed study of response of ADS materials to the spallation neutrons is required. For this purpose reaction rates of different reactions like (n, x n) and ( n , x nyp) in 209 Bi, nat Mo, 56 Fe, nat Ni, 55 Mn, nat Ti and nat Co materials are determined in an experiment conducted at Nuclotron of JINR, Dubna, using 1.6 GeV d-beam in the ‘Energy+Transmutation’ set-up. Reaction rates of various (n, x n) and (n, x nyp) reactions are studied in these samples. Results of reaction rates deduced from all the gamma peaks observed in case of 209 Bi (n, x n) reactions with x =3−9, nat Mo (n, γ), (n, 3n), (n, 6n), 56 Fe (n, p), (n, p2n), (n, p4n), nat Ni (n, 2n), (n, 3n), (n, p), (n, d), (n, t), 55 Mn (n, γ), (n, 2n), (n, 4n), nat Ti (n, p), (n, d), (n, t) and nat Co (n, γ), (n, x n) reactions with x =2–5 along with (n, p), (n, 2p2n), (n, 2p4n) and (n, 2p6n) are presented. The measured reaction rates for all the elements show good consistency for all the reaction channels and all observed E γ 's of the product nucleus. For all the above mentioned reactions, both experimental as well as theoretical spectrum average cross-sections ( σ sp.av.cs ) are deduced and compared. A close agreement is found between the experimental σ sp.av.cs and theoretical σ sp.av.cs values.