Decay strength distributions in 12C(12C,γ) radiative capture

被引：22

作者：

Jenkins, D. G. ^{[1
]}

Fulton, B. R. ^{[1
]}

Marley, P. ^{[1
]}

Fox, S. P. ^{[1
]}

Glover, R. ^{[1
]}

Wadsworth, R. ^{[1
]}

Watson, D. L. ^{[1
]}

Courtin, S. ^{[2
]}

Haas, F. ^{[2
]}

Lebhertz, D. ^{[2
]}

Beck, C. ^{[2
]}

Papka, P. ^{[2
]}

Rousseau, M. ^{[2
]}

Sanchez i Zafra, A. ^{[2
]}

Hutcheon, D. A. ^{[3
]}

Davis, C. ^{[3
]}

Ottewell, D. ^{[3
]}

Pavan, M. M. ^{[3
]}

Pearson, J. ^{[3
]}

Ruiz, C. ^{[3
]}

Ruprecht, G. ^{[3
]}

Slater, J. ^{[3
]}

Trinczek, M. ^{[3
]}

D'Auria, J. ^{[4
]}

Lister, C. J. ^{[5
]}

Chowdhury, P. ^{[5
,6
]}

Andreoiu, C. ^{[7
]}

Valiente-Dobon, J. J. ^{[7
]}

Moon, S. ^{[8
]}

机构：

[1] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[2] Univ Strasbourg, IPHC, CNRS, IN2P3, F-67037 Strasbourg 2, France

[3] TRIUMF, Vancouver, BC V6T 2A3, Canada

[4] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[5] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[6] Univ Massachusetts, Dept Phys, Lowell, MA 01854 USA

[7] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[8] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England

来源：

PHYSICAL REVIEW C | 2007年 / 76卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.76.044310

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The heavy-ion radiative capture reaction, C-12(C-12,gamma), has been investigated at energies both on- and off-resonance, with a particular focus on known resonances at E-c.m.=6.0, 6.8, 7.5, and 8.0 MeV. Gamma rays detected in a BGO scintillator array were recorded in coincidence with Mg-24 residues at the focal plane of the DRAGON recoil separator at TRIUMF. In this manner, the relative strength of all decay pathways through excited states up to the particle threshold could be examined for the first time. Isovector M1 transitions are found to be a important component of the radiative capture from the E-c.m.=6.0 and 6.8 MeV resonances. Comparison with Monte Carlo simulations suggests that these resonances may have either J=0 or 2, with a preference for J=2. The higher energy resonances at E-c.m.=7.5 and 8.0 MeV have a rather different decay pattern. The former is a clear candidate for a J=4 resonance, whereas the latter has a dominant J=4 character superposed on a J=2 resonant component underneath. The relationship between these resonances and the well-known quasimolecular resonances as well as resonances in breakup and electrofission of Mg-24 into two C-12 nuclei are discussed.

引用

页数：14

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