Origin and Consequences of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="bold">C</mml:mi><mml:mprescripts /><mml:none /><mml:mn>12</mml:mn></mml:mmultiscripts><mml:mo>+</mml:mo><mml:mmultiscripts><mml:mi mathvariant="bold">C</mml:mi><mml:mprescripts /><mml:none /><mml:mn>12</mml:mn></mml:mmultiscripts></mml:math>Fusion Resonances at Deep Sub-barrier Energies

Jiang, C. L.; Back, B. B.; Esbensen, H.; Janssens, R. V. F.; Rehm, K. E.; Charity, R. J.

doi:10.1103/physrevlett.110.072701

Cited by 62 publications

(56 citation statements)

References 34 publications

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“…This correlation holds true across the entire measured energy range, except the unusually strong resonance reported by Spillane [10]. The reason for this has been explained as due to the relatively lower level density in the compound nucleus for 12 C+ 12 C compared to 12 C+ 13 C and 13 C+ 13 C [13,14]. As a result, the isotope fusion systems provide an upper limit for the 12 C+ 12 C system.…”

Section: An Upper Limit On the Resonance Strengthssupporting

confidence: 48%

Constraining the¹²C+¹²C fusion cross section for astrophysics

Bucher

Fang

Tang

et al. 2015

EPJ Web of Conferences

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Abstract. The 12 C+ 12 C reaction is one of the single most important nuclear reactions in astrophysics. It strongly influences late evolution of massive stars as well as the dynamics of type Ia supernovae and x-ray superbursts. An accurate estimation of the cross section at relevant astrophysical energies is extremely important for modeling these systems. However, the situation is complicated by the unpredictable resonance structure observed at higher energies. Two recent studies at Notre Dame have produced results which help reduce the uncertainty associated with this reaction. The first uses correlations with the isotope fusion systems, 12 C+ 13 C and 13 C+ 13 C, to establish an upper limit on the resonance strengths in 12 C+ 12 C. The other focuses on the specific channel 12 C+ 12 C→ 23 Mg+n and its low-energy measurement and extrapolation which is relevant to s-process nucleosynthesis. The results from each provide important constraints for astrophysical models.

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Section: An Upper Limit On the Resonance Strengthssupporting

confidence: 48%

Constraining the¹²C+¹²C fusion cross section for astrophysics

Bucher

Fang

Tang

et al. 2015

EPJ Web of Conferences

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“…3) cannot be reproduced by the BPM using the mean-field potential of the 12 C+ 12 C system. Such an oscillation of the S factor in this energy range has been discussed as a resonant behavior of the 12 C+ 12 C fusion reaction [18,33] caused by the relatively large spacings and narrow widths of the 24 Mg * compound levels [34]. Although our mean-field approach to the 12 C+ 12 C potential does not include any resonance effect, the average description of the S factor by the folded CDM3Y6 potential is quite c.m.…”

Section: Resultsmentioning

confidence: 94%

Mean-field Study of \(^{12}\)C+\(^{12}\)C Fusion

Chien¹,

Cuong²,

Khoa³

2015

Comm. in Phys.

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Abstract. The nuclear mean-field potential arising from the 12 C+ 12 C interaction at the low energies relevant for the astrophysical carbon burning process has been constructed within the double-folding model, using the realistic nuclear ground-state density of the 12 C nucleus and the effective M3Y nucleon-nucleon (NN) interaction constructed from the G-matrix of the Paris (free) NN potential. To explore the nuclear medium effect, both the original density independent M3Y-Paris interaction and its density dependent CDM3Y6 version have been used in the folding model calculation of the 12 C+ 12 C potential. The folded potentials at the different energies were used in the optical model description of the elastic 12 C+ 12 C scattering at the energies around and below the Coulomb barrier, as well as in the barrier penetration model to estimate the fusion cross section and astrophysical S factor of the 12 C+ 12 C reactions at the low energies. The obtained results are in good agreement with experimental data over a wide range of energies.

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“…Moreover, in the energy region around and well below the Coulomb barrier, the prominent of resonant structures in 12 C+ 12 C fusion excitation functions makes it extremely difficult to extrapolate the fusion cross section at energies of astrophysical interest from the available data at the higher energies [1]. Therefore, during the last four decades, 12 C+ 12 C fusion at low energies still attracts a lot of experimental and theoretical efforts [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Role of the shape deformation in 12C + 12C fusion at sub-Coulomb energies

Chien

Bui

Thach

2019

Sci. Tech. Dev. J. - Nat. Sci.

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 Abstract-The fusion cross section of 12 C+ 12 C system at the energies of astrophysical interest is calculated in the framework of barrier penetration model taking into account the deformed shape of interacting nuclei. In particular, the quadrupole surface deformation of both projectile and target nuclei has been included during the fusion process. The real and imaginary parts of nucleus-nucleus interactions performed using the Woods-Saxon square and Woods-Saxon functions, respectively have been carefully tested by 12 C-12 C elastic scattering data analysis before employed to evaluate the astrophysical S factors (the fusion cross sections). The optical model results of elastic angular distributions are consistent with the experimental data. Within the barrier penetration model, the real part of the obtained optical potential gives a good description of the non-resonant astrophysical S factor. It turns out that the taking into account of quadrupole deformation of 12 C nuclei increases the astrophysical S factor at energies below Coulomb barrier.

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Origin and Consequences ofC12+C12Fusion Resonances at Deep Sub-barrier Energies

Cited by 62 publications

References 34 publications

Constraining the¹²C+¹²C fusion cross section for astrophysics

Constraining the¹²C+¹²C fusion cross section for astrophysics

Mean-field Study of \(^{12}\)C+\(^{12}\)C Fusion

Role of the shape deformation in 12C + 12C fusion at sub-Coulomb energies

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Origin and Consequences ofC12+C12Fusion Resonances at Deep Sub-barrier Energies

Cited by 62 publications

References 34 publications

Constraining the12C+12C fusion cross section for astrophysics

Constraining the12C+12C fusion cross section for astrophysics

Mean-field Study of \(^{12}\)C+\(^{12}\)C Fusion

Role of the shape deformation in 12C + 12C fusion at sub-Coulomb energies

Contact Info

Product

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About

Constraining the¹²C+¹²C fusion cross section for astrophysics

Constraining the¹²C+¹²C fusion cross section for astrophysics