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# Investigation of fission and spallation reactions by Induced Activity Method

 Grant number: 16/18902-9 Support type: Regular Research Grants Duration: December 01, 2016 - November 30, 2018 Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics Principal researcher: Gayane Karapetyan Grantee: Gayane Karapetyan Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil Assoc. researchers: Airton Deppman

Abstract

The main aim of the present project is to establish and to implement a new research area based on the induced-activity method (IAM), by the creation and establishment of a scientific group at Centro de Ciências Naturais e Humanas (CCNH) da Universidade Federal do ABC (UFABC). The IAM exploits gamma-ray spectrometry, that is used for the cross section determination. The induced gamma-activity allows to study the main features of the reaction mechanism, such as reaction residues formation, determination of the main parameters of the charge distribution. We shall be able to construct the mass yield distribution, based on the isobaric distribution of the fragments. This project has also the goal to estimate the fissility in the case of actinide and pre-actinide targets. We shall determine the main kinematical features of reaction products and their analysis, in the frame of the two-step vector model. We shall study and calculate the isomer cross section ratios, and estimate the average initial angular momentum of the reaction remnant by using the statistical model of Huizenga-Vandenbosch. The cross sections from different targets materials will be studied, analyzed and calculated here in CCNH-UFABC, by using the experimentally obtained $\gamma$-spectra. The grants BEPE FAPESP 2013/01754-9 and 2014/00284-1 had been successful accomplished. Those grants have provided a prominent source of material for our published results. The scientific independence along the last years, and the results of my research with the post-doc grant FAPESP 2011/00314-0 and its ramifications BEPE motivates us to propose extensions of the work successfully developed heretofore. It shall be accomplished by establishing new lines of research in an emergent center, namely, the CCNH-UFABC, being pioneers not solely at UFABC, however in Brazil, concerning the IAM. (AU)