Continuum spectroscopy with a {sup 10}C beam: Cluster structure and three-body decay

Journal Article · Sat Aug 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.024306· OSTI ID:21293781

Charity, R J; Wiser, T D; Mercurio, K; Shane, R; Sobotka, L G; Wuosmaa, A H; Banu, A; Trache, L; Tribble, R E ^[1]

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1. Departments of Chemistry and Physics, Washington University, St. Louis, Missouri 63130 (United States)

Resonance-decay spectroscopy is used to study particle-unbound excited states produced in interactions of E/A=10.7 MeV {sup 10}C on Be and C targets. After inelastic scattering, structures associated with excited states in {sup 10}C were observed at 5.22, 5.29, 6.55, 6.56, 6.57, and 8.4 MeV which decay into the 2p+2{alpha} final state. This final state is created via a number of different decay paths, which include prompt and sequential two-proton decay to the ground state of {sup 8}Be, {alpha} decay to {sup 6}Be{sub g.s.}, and proton decay to the 2.345-MeV state of {sup 9}B. For the sequential two-proton decay states (5.22 and 6.55 MeV), angular correlations between the first two decay axes indicate that the spin of these states are nonzero. For the prompt two-proton decay of the 5.29-MeV state, the three-body correlations between the two protons and the core are intermediate between those measured for ground-state {sup 6}Be and {sup 45}Fe decays. The 6.55- and 6.57-MeV structures are most probably associated with the same level, which has a 14% two-proton decay branch with a strong ''diproton'' character and a 86% sequential two-proton decay branch. Correlations between the fragments following the three-body decay of the 2.345-MeV state of {sup 9}B can be approximately described by sequential {alpha} decay to the {sup 5}Li intermediate state. The 8.06- and 9.61-MeV {sup 10}B states that decay into the d+{sup 6}Li{sub 2.186} channel are confirmed. Evidence for cluster structure in {sup 13}N is obtained from a number of excited states that decay into the p+3{alpha} exit channel.

• OSTI ID: 21293781
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ANGULAR CORRELATION
BEAMS
BERYLLIUM 6
BERYLLIUM 8
BORON 10
BORON 9
CARBON 10
EXCITED STATES
GROUND STATES
INELASTIC SCATTERING
INTERMEDIATE STATE
IRON 45
LITHIUM 5
MEV RANGE 01-10
NITROGEN 13
PROTON-EMISSION DECAY
PROTONS
RESONANCE
SPECTROSCOPY
SPIN
THREE-BODY PROBLEM