Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-22 2:39

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Conference: Bucharest University Faculty of Physics 2010 Meeting

Section: Nuclear and Elementary Particles Physics

Title:

Cross Section Calculations of Proton Induced Reactions on 67,68Zn

Authors:

Larisa Georgiana Giubega, Mihaela Sin

Affiliation:

Faculty of Physics, University of Bucharest

E-mail

giubega_georgiana@yahoo.com

Keywords:

67Ga,cross section, nuclear model calculation, data evaluation

Abstract:

Cross Section Calculations of Proton Induced Reactions on 67,68Zn Larisa Georgiana Giubega, Mihaela Sin Faculty of Physics, University of Bucharest The prediction power of the nuclear reaction models and parameters represents a major and constant concern for the nuclear data evaluators. The best way to asses it is by comparing model calculations with highly accurate experimental data. Such extensive studies have been performed for neutron induced reactions especially up to 20 MeV incident energy, but modern applications such as radiotherapy require nuclear data for charged particle induced reactions on extended energy ranges. The goal of this paper is to test the nuclear models implemented in EMPIRE 3 code [1] and some of the most important parameters included in the recently released version of Reference Input parameter Library (RIPL-3) [2] against the accurate experimental data for 67Zn(p,n)67Ga and 68Zn(p,2n)67Ga in the energy range 1-30 MeV. Initially used as a diagnostic SPECT nuclide, 67Ga is also finding increasing use in metabolic therapy being an almost pure Auger electron emitter with a favorable half-life of 3.2 days [3]. The paper presents comparatively the impact on the cross sections of the different optical potential parameters available in RIPL-3 which describe the incident and outgoing reaction channels. The next important ingredients in any reaction data calculation, beside the optical model potentials, are the level densities. Therefore, the most advanced formulations to describe level densities (the phenomenological Enhanced Generalized Superfluid Model and global microscopic nuclear level densities within the HFB plus combinatorial method) in RIPL-3 have been also tested in calculations. EMPIRE’s final results based on our selection of parameters are compared with all available evaluations and experimental data. [1] M.Herman, R. Capote, B.V.Carlson, P. Oblozinsky, M. Sin, A. Trkov, H. Wienke, V. Zerkin, Nuclear Data Sheets, 108, 12, 2655-2715 (2007) [2] R. Capote et al, Nuclear Data Sheets, 110, 12, 3107-3214, (2009) [3] J.Sublet, R. Capote, INDC(NDS)-0501 (2006)