Abstract
Angular distributions of protons, deuterons, tritons and alpha particles emitted in the reaction 2H+9Be at Elab=19.5 MeV were measured with an aim to shed light on the internal cluster structure of 9Be and to study possible cluster transfer of 5He. The analyses suggest a significant contribution of five-nucleon transfer in the reaction channel 9Be(d,4He)7Li.
Highlights
Due to the Borromean structure, a special attention has been focused on the 9Be nucleus, the breakup of which can occur directly into two alpha particles and a neutron or via one of two unstable intermediate nuclei such as 8Be or 5He [1, 2]
The angular distributions of the 9Be(d,d)9Be, 9Be(d,p)10Be, 9Be(d,t)8Be, 9Be(d,3He)8Li, and 9Be(d,4He)7Li reaction channels were measured at various values of the projectile energies
It is assumed that the state 2.43 MeV is the first excited state in the rotational band of 9Be
Summary
Due to the Borromean structure, a special attention has been focused on the 9Be nucleus, the breakup of which can occur directly into two alpha particles and a neutron or via one of two unstable intermediate nuclei such as 8Be or 5He [1, 2]. 2. Experimental Method The experiments were performed using 2H ion beams at 19.5 MeV, 25 MeV and 35 MeV energies delivering by the accelerator facilities at INP (Rez, Czech Republic), IPNO (Orsay, France) and Department of Physics, University of Jyvaskyla, Jyvaskyla (Finland), respectively.
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