Further insights into the reactionBe14(CH2,X)He10

Abstract

A previously published measurement of the reaction of a 59 MeV/nucleon 14 Be beam on a deuterated polyethylene target was further analyzed to search for 12 He as well as initial state effects in the population of the 10 He ground state. No evidence for either was found. A lower limit of about 1 MeV was determined for a possible resonance in 12 He. In addition, the 3-body decay energy spectrum of 10 He could not be described by a reaction mechanism calculation based on the halo structure of the initial 14 Be assuming a direct α-particle removal reaction.

Energy spectrum of neutron-rich helium isotopes: Complex made simple

“…The odd-N isotopes 5 He [1,4,5] and 7 He [6,7] are neutron-unbound. Presently, too little is known about the elusive 9 He [8,9] and 10 He [3,4,[10][11][12][13][14][15][16][17][18][19] isotopes to firmly conclude whether they represent genuine nuclear systems or not. The current experimental information on the energy spectrum of 5−10 He is displayed in Fig.…”