Radiative Capture Process at the Coulomb Barrier: the Resonant {sup 12}C+{sup 16}O Case

Journal Article · Wed Aug 26 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3232107· OSTI ID:21322842

Lebhertz, D; Courtin, S; Haas, F; Beck, C; Michalon, A; Rousseau, M ^[1]; Salsac, M -D ^[2]; Marley, P L; Glover, R G; Kent, R E ^[3]; Hutcheon, D A; Davis, C; Pearson, J E ^[4]

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1. IPHC, CNRS/IN2P3, Universite de Strasbourg, F-67037 Strasbourg Cedex 2 (France)
2. CEA-Saclay, Service de Physique Nucleaire, 91191 Gif-sur-Yvette (France)
3. Department of Physics, University of York, Heslington, York YO10 (United Kingdom)
4. TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., V6T 2A3 (Canada)

In a recent experiment performed at Triumf using the Dragon 0 deg. spectrometer and its associated BGO array we have measured for the first time the full gamma decay of the radiative capture channel close to the Coulomb barrier. This measurement has been performed at 3 energies E{sub cm} = 8.5, 8.8 and 9 MeV. We have extracted a radiative capture cross section more than five times larger than what had been previously observed. A selective contribution of the entrance spins 5{sup -} and 6{sup +} has also been evidenced whereas 1{sup -} to 3{sup -} spins are predicted to be predominant by coupled-channel calculations. At E{sub cm} = 9 MeV, stronger structural behaviour appears which is characterised by a larger total cross section and also by the particularly strong feeding of the {sup 28}Si prolate 4{sup +} state at 9.16 MeV. This level is explained by several models in terms of {sup 12}C-{sup 16}O cluster sub-structure. Our data is compared to such cluster-model predictions and the agreement is quite good.

• OSTI ID: 21322842
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1165; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BGO DETECTORS
CAPTURE
CARBON 12
CLUSTER MODEL
COULOMB FIELD
COUPLED CHANNEL THEORY
GAMMA DECAY
GAMMA SPECTROMETERS
GAMMA SPECTROSCOPY
MEV RANGE
NUCLEAR STRUCTURE
OXYGEN 16
RADIOACTIVE ION BEAMS
SILICON 28
SPIN
TOTAL CROSS SECTIONS
TRIUMF CYCLOTRON