Evaluation of photonuclear reaction data on tantalum-181 up to 140 MeV

Photonuclear cross sections of Ta-181 are evaluated up to an incident photo n energy of 140 MeV which is the threshold energy for pion production. Re-a nalyses were performed on the (gamma, n) and (gamma, 2n) data measured at S aclay and Livermore, and reference data were reconstructed. The absorption cross sections were evaluated with the giant electric dipole resonance (GDR ) model below 40 MeV. The calculation by the statistical model with preequi librium correction reproduced the reference data of all the photoneutron cr oss sections consistently. From 40 to 140 MeV, the quasideuteron model (QDM ) was adopted to evaluate photoabsorption cross sections and the results ar e compared with the measurements. The decaying processes including n, p, d, t, He-3, and alpha particle emission up to 140 MeV were theoretically eval uated by the ALICE-F code.