Extension of excitation functions of proton-induced reactions on bismuth
Abstract
Production cross sections for 209Bi(p, xn) 207,206,205,204Po and 209Bi(p, pxn) 207,206,205,204,203Bi reactions were measured using the stacked-foil technique. In our previous work, excitation functions of the mentioned reactions were measured at proton energies from 60 to 100 MeV. In this work, the excitation functions of the reactions are extended down to the proton energy of 40 MeV. Two targets were arranged in two different stacks including Bi, Al, and Au foils as well as Bi and Pb plates. After the irradiations, production yields of interested radionuclei were measured by γ -ray spectroscopy system using HPGe detectors. Proton beam intensities were measured using 27Al(p , 3 p n )24Na, 197Au(p , p 3 n )194Au, and 197Au(p , p n )196Au monitor reactions. More than 50 cross-section data points were measured, including independent and cumulative cross sections. A similar trend was found between the data measured in this work and our earlier work. Our measured data were consistent with the experimental data in the literature. Excitation functions of the investigated reactions were also calculated using the uc(talys)-1.9 code with six different level density models. The results showed that phenomenological level density models predicted higher cross-section value than the microscopic level density models for the 209Bi(p, xn) reactions. However, microscopic level density models indicated higher calculated cross sections for the 209Bi(p, pxn) reactions.
- Publication:
-
Physical Review C
- Pub Date:
- January 2020
- DOI:
- 10.1103/PhysRevC.101.014602
- Bibcode:
- 2020PhRvC.101a4602M