Correlated two-proton decay fromC10

Abstract

The decay of 10 C excited states to the 2p + 2α exit channel has been studied using inelastic excitation of a secondary 10 C beam. The decay sequences leading to the 2p + 2α final state are determined for the previously known levels and for a newly found level at E * = 8.4 MeV. A state at E * = 6.57 MeV is shown to undergo two-proton decay to 8 Be g.s. with strong p-p correlations consistent with the 1 S phase shift. Based on the lack of such correlations for other two-proton decays, this indicates that the correlations are associated with structure of the parent level.

2p-2pdecay of8Cand i

“…3(b) and 3(d), we see that the two protons from the decay of 8 C show a significant enhancement at small relative proton energies, the so-called diproton region, relative to the 2p decay of 6 Be. This enhancement is similar to that observed in two other 2p emission cases: the excited state in 10 C at 6.6 MeV [10,11] and the much heavier case of 45 Fe [4,5]. The distribution of the energy in the Jacobi Y system (not shown) is almost identical PHYSICAL REVIEW C 82, 041304(R) (2010) to that found for 6 Be (see Fig.…”

Invariant-mass spectroscopy of Ne18, O16 , and CCharity1, Brown2, Elson3 et al. 2019Phys. Rev. CSelf Cite222420View full textAdd to dashboardCite

“…This is the only available final exit channel for particle decay until E * =15.0 MeV when the 3 He+ 7 Be channel is available. A number of invariant-mass studies have investigated 2p+2α exit channels produced in the inelastic excitation of a 10 C beam [50][51][52][53]. Numerous states were observed whose decay are initiated by either by p, α, or direct two-proton emission.…”

Three-body decay ofBe6

“…New cases of 2p radioactivity were found for 54 Zn [6], 19 Mg [9], and, maybe, 48 Ni [5]. The 2p correlations were recently measured in 45 Fe [8], 19 Mg [9, 10], 16 Ne [10], and 10 C [11]. Very interesting [12], but, so far, controversial [13] case is possibility of 2p emission off deformed isomeric state in 94 Ag.…”