Development of nuclear theory and computer code for the evaluation of nuclear cross-sections relevant to beam monitoring used in medical radioisotope production and fusion technology. Final report for the period 15 December 1995 - 14 December 1997

摘要

Nuclear reactions induced by light charged particles in copper are of importance as monitors in medical radioisotope production. Careful evaluations are needed for the excitation functions of activation reactions in copper with protons, 4-He and 3-He from the point of view of their use as beam flux monitors in the incident energy range below 30 MeV. The method used in the present work was based on theoretical calculations and comparison with experimental data. Calculations were performed using the Hauser-Feshbach statistical model and the preequilibrium hybrid model. To this end, the codes HFMOD and PREMOD developed at PINSTECH, Pakistan, were employed. Careful selection of optical model parameters, nuclear level densities as well as discrete levels was performed. Obtained were 10 excitation functions for production of radioactive isotopes on 63-Cu and 65-Cu with p, 4-He and 3-He: Protons in 3-25 MeV range, 63-Cu(p,n) 63-Zn, 63-Cu(p,2n) 62-Zn, 65-Cu(p,n) 65- Zn; Alphas in 8-27 MeV energy range, 63-Cu(a,n) 66-Ga, 63-Cu(a,2n) 65-Ga, 63- Cu(a,np) 65-Zn, 65-Cu(a,n) 68-Ga, 65-Cu(a,2n) 67-Ga; 3-He in 7-20 MeV range, 63- Cu(3He,n) 67-Ga, 65-Cu(3He,2n) 66-Ga. (author) Refs, figs, tabs