Decay strength distributions in C-12(C-12,gamma) radiative capture

D. G. Jenkins; B. R. Fulton; P. Marley; S. P. Fox; R. Glover; R. Wadsworth; D. L. Watson; S. Courtin; F. Haas; D. Lebhertz; C. Beck; P. Papka; M. Rousseau; A. sanchez zafra; D. A. Hutcheon; C. Davis; D. Ottewell; M. M. Pavan; J. Pearson; C. Ruiz; G. Ruprecht; J. Slater; M. Trinczek; J. D'Auria; C. J. Lister; P. Chowdhury; C. Andreoiu; J. J. Valiente-Dobon; S. Moon

doi:10.1103/PhysRevC.76.044310

Decay strength distributions in C-12(C-12,gamma) radiative capture

D. G. Jenkins, B. R. Fulton, P. Marley, S. P. Fox, R. Glover, R. Wadsworth, D. L. Watson, S. Courtin, F. Haas, D. Lebhertz, C. Beck, P. Papka, M. Rousseau, A. sanchez zafra, D. A. Hutcheon, C. Davis, D. Ottewell, M. M. Pavan, J. Pearson, C. RuizG. Ruprecht, J. Slater, M. Trinczek, J. D'Auria, C. J. Lister, P. Chowdhury, C. Andreoiu, J. J. Valiente-Dobon, S. Moon

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Abstract

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.

Original language	English
Article number	044310
Pages (from-to)	-
Number of pages	14
Journal	Physical Review C
Volume	76
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.76.044310
Publication status	Published - Oct 2007

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10.1103/PhysRevC.76.044310

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Jenkins, D. G., Fulton, B. R., Marley, P., Fox, S. P., Glover, R., Wadsworth, R., Watson, D. L., Courtin, S., Haas, F., Lebhertz, D., Beck, C., Papka, P., Rousseau, M., sanchez zafra, A., Hutcheon, D. A., Davis, C., Ottewell, D., Pavan, M. M., Pearson, J., ... Moon, S. (2007). Decay strength distributions in C-12(C-12,gamma) radiative capture. Physical Review C, 76(4), -. Article 044310. https://doi.org/10.1103/PhysRevC.76.044310

@article{4623835eaa9e461b83abf57c80bdb569,

title = "Decay strength distributions in C-12(C-12,gamma) radiative capture",

abstract = "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.",

author = "Jenkins, {D. G.} and Fulton, {B. R.} and P. Marley and Fox, {S. P.} and R. Glover and R. Wadsworth and Watson, {D. L.} and S. Courtin and F. Haas and D. Lebhertz and C. Beck and P. Papka and M. Rousseau and {sanchez zafra}, A. and Hutcheon, {D. A.} and C. Davis and D. Ottewell and Pavan, {M. M.} and J. Pearson and C. Ruiz and G. Ruprecht and J. Slater and M. Trinczek and J. D'Auria and Lister, {C. J.} and P. Chowdhury and C. Andreoiu and Valiente-Dobon, {J. J.} and S. Moon",

year = "2007",

month = oct,

doi = "10.1103/PhysRevC.76.044310",

language = "English",

volume = "76",

pages = "--",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

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Jenkins, DG , Fulton, BR, Marley, P, Fox, SP, Glover, R, Wadsworth, R, Watson, DL, Courtin, S, Haas, F, Lebhertz, D, Beck, C, Papka, P, Rousseau, M, sanchez zafra, A, Hutcheon, DA, Davis, C, Ottewell, D, Pavan, MM, Pearson, J, Ruiz, C, Ruprecht, G, Slater, J, Trinczek, M, D'Auria, J, Lister, CJ, Chowdhury, P, Andreoiu, C, Valiente-Dobon, JJ & Moon, S 2007, 'Decay strength distributions in C-12(C-12,gamma) radiative capture', Physical Review C, vol. 76, no. 4, 044310, pp. -. https://doi.org/10.1103/PhysRevC.76.044310

TY - JOUR

T1 - Decay strength distributions in C-12(C-12,gamma) radiative capture

AU - Jenkins, D. G.

AU - Fulton, B. R.

AU - Marley, P.

AU - Fox, S. P.

AU - Glover, R.

AU - Wadsworth, R.

AU - Watson, D. L.

AU - Courtin, S.

AU - Haas, F.

AU - Lebhertz, D.

AU - Beck, C.

AU - Papka, P.

AU - Rousseau, M.

AU - sanchez zafra, A.

AU - Hutcheon, D. A.

AU - Davis, C.

AU - Ottewell, D.

AU - Pavan, M. M.

AU - Pearson, J.

AU - Ruiz, C.

AU - Ruprecht, G.

AU - Slater, J.

AU - Trinczek, M.

AU - D'Auria, J.

AU - Lister, C. J.

AU - Chowdhury, P.

AU - Andreoiu, C.

AU - Valiente-Dobon, J. J.

AU - Moon, S.

PY - 2007/10

Y1 - 2007/10

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevC.76.044310

DO - 10.1103/PhysRevC.76.044310

M3 - Article

SN - 0556-2813

VL - 76

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044310

ER -