Evaluation of Photonuclear Reaction Data on Tantalum-181 up to 140 MeV.

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  • Evaluation of Photonuclear Reaction Dat

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Abstract

Photonuclear cross sections of 181Ta are evaluated up to an incident photon energy of 140MeV which is the threshold energy for pion production. Re-analyses were performed on the (γ, n) and (γ, 2n) data measured at Saclay and Livermore, and reference data were reconstructed. The absorption cross sections were evaluated with the giant electric dipole resonance (GDR) model below 40MeV. The calculation by the statistical model with preequilibrium correction reproduced the reference data of all the photoneutron cross sections consistently. From 40 to 140MeV, the quasideuteron model (QDM) was adopted to evaluate photoabsorption cross sections and the results are compared with the measurements. The decaying processes including n, p, d, t, 3He, and α particle emission up to 140MeV were theoretically evaluated by the ALICE-F code.

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