For the first time in an application to nuclear astrophysics, a process induced by the unstable 5He = (4He-n) nucleus, the 3He+5He→ 2α reaction, has been studied through the Trojan Horse Method (THM). For that purpose, the quasi-free (QF) contribution of the 9Be(3He,αα)4He reaction was selected at E3He=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 α and 5He particle cluster in the 9Be nucleus in the ground state have been extracted. The angular distribution of the QF 3He+5He→ 2α reaction was measured at θcm = 78∘–115∘. The energy dependence of the differential cross section of the 3He+5He→ 2α virtual reaction was extracted in the energy range Ecm = 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 Ecm =300–620 keV.
The 3 He+ 5 He → α + α reaction below the Coulomb barrier via the Trojan Horse Method / Spitaleri, C.; Typel, S.; Bertulani, C. A.; Mukhamedzhanov, A. M.; Kajino, T.; Lattuada, M.; Cvetinovic, A.; Messina, S.; Guardo, G. L.; Soic, N.; Milin, M.; Perrotta, S. S.; Li, C.; Colovic, P.; D'Agata, G.; Dell'Aquila, D.; Fatuzzo, C. G.; Gulino, M.; Hou, S. Q.; Cognata, M. L.; Lattuada, D.; Nurkic, D.; Popocovski, R.; Skukan, N.; Szilner, S.; Trippella, O.; Uroic, M.; Vukman, N.. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - 57:1(2021). [10.1140/epja/s10050-020-00324-4]
The 3 He+ 5 He → α + α reaction below the Coulomb barrier via the Trojan Horse Method
Dell'Aquila D.;
2021-01-01
Abstract
For the first time in an application to nuclear astrophysics, a process induced by the unstable 5He = (4He-n) nucleus, the 3He+5He→ 2α reaction, has been studied through the Trojan Horse Method (THM). For that purpose, the quasi-free (QF) contribution of the 9Be(3He,αα)4He reaction was selected at E3He=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 α and 5He particle cluster in the 9Be nucleus in the ground state have been extracted. The angular distribution of the QF 3He+5He→ 2α reaction was measured at θcm = 78∘–115∘. The energy dependence of the differential cross section of the 3He+5He→ 2α virtual reaction was extracted in the energy range Ecm = 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 Ecm =300–620 keV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
