The $$^3$$He+$$^5$$He$$\rightarrow $$ $$\alpha $$+$$\alpha $$ reaction below the Coulomb barrier via the Trojan Horse Method

Autor: Giuseppe D’Agata, Toshitaka Kajino, C. G. Fatuzzo, D. Lattuada, S. Q. Hou, A. Cvetinović, Chengbo Li, P. Čolović, C. Spitaleri, Deni Nurkić, Stefan Typel, Carlos A. Bertulani, Natko Skukan, A. M. Mukhamedzhanov, M. Gulino, S. Messina, Oscar Trippella, D. Dell'Aquila, Suzana Szilner, M. La Cognata, Nikola Vukman, M. Uroić, G. L. Guardo, M. Lattuada, S. S. Perrotta, R. Popočovski, Matko Milin, Neven Soić
Rok vydání: 2021
Předmět:
Zdroj: The European Physical Journal A. 57
ISSN: 1434-601X
1434-6001
DOI: 10.1140/epja/s10050-020-00324-4
Popis: For the first time in an application to nuclear astrophysics, a process induced by the unstable $$^5$$ He = ( $$^4$$ He-n) nucleus, the $$^3$$ He+ $$^5$$ He $$\rightarrow $$ 2 $$\alpha $$ reaction, has been studied through the Trojan Horse Method (THM). For that purpose, the quasi-free (QF) contribution of the $$^9$$ Be( $$^3$$ He, $$\alpha \alpha $$ ) $$^4$$ He reaction was selected at $$E_{^{3}\text{ He }}=4$$ MeV incident energy. The reaction was studied in a kinematically complete experiment following a recent publication (Spitaleri et al. in Eur Phys J A 56:18, 2020), where for the quasi free contribution the momentum distribution between $$\alpha $$ and $$^5$$ He particle cluster in the $$^9$$ Be nucleus in the ground state have been extracted. The angular distribution of the QF $$^3$$ He+ $$^5$$ He $$\rightarrow $$ 2 $$\alpha $$ reaction was measured at $$\theta _{cm}$$ = 78 $$^{\circ }$$ –115 $$^{\circ }$$ . The energy dependence of the differential cross section of the $$^3$$ He+ $$^5$$ He $$ \rightarrow $$ 2 $$\alpha $$ virtual reaction was extracted in the energy range $$E_{cm}$$ = 0–650 keV. The total cross section obtained from the Trojan-horse method was normalized to absolute cross sections from a theoretical calculation in the energy range $$E_{cm}$$ =300–620 keV.
Databáze: OpenAIRE
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