The first measurement of the (n,d*) reactions cross section for the d–T neutrons using highly enriched 132,134Xe isotopes.

The cross sections for the reactions 132Xe(n,d*)131I and 134Xe(n,d*)133I were measured at energies around 14 MeV. The neutron fluence standard corresponds to the cross-section of the monitor reaction 93Nb(n,2n)92mNb. The facilities from the China Academy of Engineering Physics (CAEP) were used for this experimental study. High purity, high-pressure, and highly enriched 132,134Xe isotope gases were used as the target sample. The T(d,n)4He reaction was used as a neutron source to generate neutrons with an energy of 14 MeV. The activities of the resulting residual product were measured using an HPGe detector. The corrected experimental parameters include the geometric properties and solid angle of the sample, as well as the effects of coincidence summation and self-attenuation of the gamma ray. The covariance analysis technique is employed to derive the uncertainty and correlation matrix of the cross section. The cross sections of the reactions 132Xe(n,d*)131I and 134Xe(n,d*)133I have experimentally been determined and reported for the first time. The TALYS-1.96 program was used to derive the theoretical excitation function curves for the nuclear reactions 132Xe(n,d*)131I and 134Xe(n,d*)133I. All results are compared, including experimental measurement, theoretical calculation, and evaluation. The reaction cross section obtained for the first time plays an important role in enhancing the database and evaluating the excitation function. [ABSTRACT FROM AUTHOR]