Investigations of three, four, and five-particle exit channels of levels in light nuclei created using a 9C beam

Abstract

The interactions of a E/A=70-MeV 9C beam with a Be target was used to populate levels in Be, B, and C isotopes which undergo decay into many-particle exit channels. The decay products were detected in the HiRA array and the level energies were identified from their invariant mass. Correlations between the decay products were examined to deduce the nature of the decays, specifically to what extent all the fragments were created in one prompt step or whether the disintegration proceeded in a sequential fashion through long-lived intermediate states. In the latter case, information on the spin of the level was also obtained. Of particular interest is the 5-body decay of the 8C ground state which was found to disintegrate in two steps of two-proton decay passing through the 6Beg.s. intermediate state. The isobaric analog of 8Cg.s. in 8B was also found to undergo two-proton decay to the isobaric analog of 6Beg.s. in 6Li. A 9.69-MeV state in 10C was found to undergo prompt 4-body decay to the 2p+2alpha exit channel. The two protons were found to have a strong enhancementin the diproton region and the relative energies of all four p-alpha pairs were consistent with the 5Lig.s. resonance.

References in corpus (3)

• Resonant Destruction as a Possible Solution to the Cosmological Lithium Problem
• Three-body decay of ${}^6$Be
• Multi-particle correlation function to study short-lived nuclei

Cited by in corpus (15)

• The observation of long-range three-body Coloumb effects in the decay of 16Ne
• Invariant-mass spectroscopy of ${}^{18}$Ne, ${}^{16}$O, and ${}^{10}$C excited states formed in neutron transfer reactions
• Non-statistical decay and $\alpha$-correlations in the ${}^{12}$C+${}^{12}$C fusion-evaporation reaction at 95 MeV
• Possible interpretation of the complex expectation values associated with resonances
• Five-body resonances in ${}^8$He and ${}^8$C using the complex scaling method
• Two-proton emission systematics
• Mirror symmetry breaking in He isotopes and their mirror nuclei
• Spectroscopic factors of resonance states with the Gamow shell model
• Mirror Symmetry Breaking Disclosed in the Decay of Three-Proton Emitter 20Al
• Soft dipole resonance in ${}^8$C and its isospin symmetry with ${}^8$He
• Gamow shell model predictions for six-proton unbound nucleus ${}^{20}$Si
• Gamow shell model calculations for the Thomas-Ehrman shift in new isotopes 21Al
• Gamow shell model study of the 17Ne(p, p) reaction and of isospin symmetry breaking in 18Na
• Direct observation of three-neutron emission from ${}^7$He${}^{\ast }$ and the search for the trineutron
• Physics of many-body resonances with complex scaling and applications to light unstable nuclei