UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

Guest
2024-11-23 18:14
 HOME     CONFERENCES     SEARCH            LOGIN     NEW USER     IMAGES   


Conference: Bucharest University Faculty of Physics 2022 Meeting


Section: Nuclear and Elementary Particles Physics


Title:
Nuclear production of Tin isotopes in the Universe and related processes


Authors:
C. OPREA 1, 2*, A. MIHUL 3**, I. OPREA 1, S. ZGURA 4, M. POTLOG 4, A. NEAGU 4


Affiliation:
1,* Joint Institute for Nuclear Research, Dubna (JINR), 141980 Russia

2 Romanian Scientific Research Agency, Bucharest (ANCS), Romania

3 University of Bucharest, Faculty of Physics, POBox MG-11, Magurele-Bucharest

** Deceased

4 Institute for Space Sciences, 077124 Magurele, Romania



E-mail
*E-mail: coprea2007@yahoo.co.uk


Keywords:
Sn isotopes, nuclear astrophysics, cross-sections, astrochemical yields, uncertainties


Abstract:
Nuclear astrophysics processes play a key role in the yields of the astrochemical elements of Big Bang Nucleosynthesis for standard cosmology. The interaction of fast protons with natural indium and the production of tin isotopes for nuclear astrophysics have been investigated. Cross-sections of processes 113In(p,gamma)114Sn, 113In(p,2n)112Sn and 115In(p,n)115Sn were evaluated for threshold protons and up to 35 MeV. The contribution of nuclear reaction mechanisms related to the discrete and continuum states of the residual nuclei have been obtained. A good agreement was reached between theoretical calculus and experimental data in the literature. The results obtained in the computer simulation showed that the concentrations of Tin isotopes depend on the cross-section and the natural abundance of the target nuclei. Astrophysical rates were determined for Tin isotopes in p + 113,115In. The uncertainties of the cross-section, related to the variation of the optical potential parameters, were analyzed.


References:

1. Meija, J., Coplen, T.B., Berglund, M., Brand, W.A., De Bievre, P., Groning, M., Holden, N.E., Irrgeher, J., Loss, R.D., Walczyk, T., Prohaska, T., Atomic Weights of Elements 2013, (IUPAC Technical Reports) , Pure Appl. Chem., 2016, vol. 88 no. 3, p. 265.

2. Audi G., Wapstra H.A., Nucl. Phys. A, 1995, vol. 595, p. 409

3. Koning, A.J., Hilaire, S., Duijvestijn, M.C., TALYS-1.0., Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors Bersillon, O., Gunsing, F., Bauge, E., Jacqmin, R., Leray, S., EDP Sciences, 2008, p. 211.

4. Hauser, W., Feshbach, H., Phys. Rev., 1952 vol. 87, no. 2, p. 366.

5. Koning, A.J., Duijvestijn, M.C., Nucl. Phys. A, 2004, vol. 744, p. 15.

6. Satchler, G.R., Direct Nuclear Reactions, Oxford University Press: New York, 1983.

7. Harissopulos S., Spyrou A., Fonteinou V., Axiotis M., Provatas G., Demetriou P., 2016, Phis. Rev. C, vol. 93, p. 025804

8. Hershberger R.L., Flynn D.S. Gabbard F., Johnson P.H. 1980, Phys. Rev. C, vol. 21, p. 896



Acknowledgement:
The present researches are supported by JINR (IUCN) Cooperation Program with Romanian Research Institutes coordinated by Romanian Plenipotentiary Representative and FLNP JINR Scientific Plan for 2021-2022.