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

Journal Article · Fri Jul 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.014320· OSTI ID:21596566

Charity, R J; Elson, J M; Manfredi, J; Shane, R; Sobotka, L G; Brown, B A; Chajecki, Z; Coupland, D; Iwasaki, H; Kilburn, M; Lee, Jenny; Lynch, W G; Sanetullaev, A; Tsang, M B; Winkelbauer, J; Youngs, M; Marley, S T; Shetty, D V; Wuosmaa, A H; Ghosh, T K ^[1]

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

The interactions of an E/A=70-MeV {sup 9}C 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 five-body decay of the {sup 8}C ground state, which was found to disintegrate in two steps of two-proton decay passing through the {sup 6}Be{sub g.s.} intermediate state. The isobaric analog of {sup 8}C{sub g.s.} in {sup 8}B was also found to undergo two-proton decay to the isobaric analog of {sup 6}Be{sub g.s.} in {sup 6}Li. A 9.69-MeV state in {sup 10}C was found to undergo prompt four-body decay to the 2p + 2{alpha} exit channel. The two protons were found to have a strong enhancement in the diproton region and the relative energies of all four p-{alpha} pairs were consistent with the {sup 5}Li{sub g.s.} resonance.

• OSTI ID: 21596566
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 84; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
ANGULAR MOMENTUM
BEAMS
BERYLLIUM
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON 8
BORON ISOTOPES
CARBON 10
CARBON 8
CARBON 9
CARBON ISOTOPES
CORRELATIONS
DAUGHTER PRODUCTS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
GROUND STATES
INTERACTIONS
INTERMEDIATE STATE
ISOBARIC ANALOGS
ISOTOPES
LIGHT NUCLEI
LITHIUM 6
LITHIUM ISOTOPES
MASS
METALS
MEV RANGE
MEV RANGE 10-100
MILLISECONDS LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
RESONANCE
SECONDS LIVING RADIOISOTOPES
SPIN
STABLE ISOTOPES
TARGETS