Measurement and DWBA analysis of the 12C(6Li, d)16O α-transfer reaction cross sections at 48.2 MeV. R-matrix analysis of 12C()16O direct capture reaction data

Belhout, A.; Ouichaoui, S.; Beaumevieille, H.; Boughrara, Amina; Fortier, S.; Kiener, J.; Maison, J.M.; Mehdi, Sadeghi; Rosier, L.; Thibaud, J. P.; Trabelsi, A.; Vernotte, J.

doi:10.1016/j.nuclphysa.2007.06.008

Cited by 63 publications

(173 citation statements)

References 87 publications

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“…With an appropriate choice of a Wood Saxon potential we reproduced an average ANC of 5.11 ± 1.52 × 10 10 fm -1 of the 6.92 MeV state from earlier works [5,11,12]. The SE2 also depends in the potential model on the alpha ground state spectroscopic factor.…”

Section: Potential Model Calculation Of Se2mentioning

confidence: 57%

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The study of¹²C(α,γ) astrophysical reaction using¹²C(⁶Li,d) and¹²C(⁷Li,t) reaction at 20 MeV and in the framework of the potential model

Adhikari

Basu

Sugathan

et al. 2015

EPJ Web of Conferences

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Abstract. The triton angular distribution in the 12 C( 7 Li,t) 16 O reaction has been measured at 20 MeV incident energy.Comparison of the data with Finite Range DWBA and CDCC-CRC calculations show that breakup coupling effects are prominent in the transfer to the ground state. This observation is similar to that in the 12 C( 6 Li,d) reaction at the same incident energy. The alpha spectroscopic factor of the 16 O ground state is determined (Sα=0.25) from a comparison of the measured angular distribution with respect to the CDCC-CRC calculations. The E2 S-factor of the 12 C(α,γ) reaction at 300 keV in the framework of a potential model is determined to be about 118 keV-barn.

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Section: Potential Model Calculation Of Se2mentioning

confidence: 57%

“…In the potential model we consider a potential that generates a a+ 12 C scattering state through which the capture occurs and finally decays to the ground state by E2 gamma transition. [5,11,12] and the ground state Sα from the present work. For details please see the text.…”

Section: Potential Model Calculation Of Se2mentioning

confidence: 66%

The study of¹²C(α,γ) astrophysical reaction using¹²C(⁶Li,d) and¹²C(⁷Li,t) reaction at 20 MeV and in the framework of the potential model

Adhikari

Basu

Sugathan

et al. 2015

EPJ Web of Conferences

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“…Despite the various experiments [2] which studied this reaction, its cross section remains highly uncertain. At the Gamow peak of 300 keV where the reaction occurs during the He burning stage, the expected cross section is about 10 −7 nbarn which means impossible to measure directly.…”

Section: O Through α-Transfer Reactionmentioning

confidence: 99%

Indirect techniques for astrophysical reaction rates determinations

Hammache¹,

Oulebsir²,

Benamara³

et al. 2016

EPJ Web of Conferences

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Direct measurements of nuclear reactions of astrophysical interest can be challenging. Alternative experimental techniques such as transfer reactions and inelastic scattering reactions offer the possibility to study these reactions by using stable beams. In this context, I will present recent results that were obtained in Orsay using indirect techniques. The examples will concern various astrophysical sites, from the Big-Bang nucleosynthesis to the production of radioisotopes in massive stars.The main characteristics of the nuclear reactions involved in stellar nucleosynthesis is the low energy where they generally occur, between few keV to few MeV and at these energies the cross sections of these reactions are very small ranging from fbarn to hundreds of pbarn especially when it involves charged particles. This makes the direct measurements at stellar energies very difficult and often impossible. Hence direct measurement are usually performed at higher energies and then extrapolated down to stellar energies where the reactions occur. However the extrapolations can lead sometimes to wrong results when a possible very low energy resonance or the tail of a possible sub-threshold resonance are not taken into account. 201, 0 0 EPJ Web of Conferences

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“…The extrapolation of the measured cross sections to stellar energies (E=300 keV) is made difficult by the presence of the two sub-threshold states at 6.92 (2 + ) and 7.12 (1 − ) MeV of 16 O. The high energy tails of these two sub-threshold resonances can increase the cross section but their effect is badly known because their reduced alpha width and so their corresponding alpha spectroscopic factors S α are spread over a large range of values [5].…”

Section: Pos(enas 6)034mentioning

confidence: 99%

Transfer reactions as a tool for nuclear astrophysics

Hammache¹

2013

Proceedings of VI European Summer School on Experimental Nuclear Astrophysics — PoS(ENAS 6)

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The cross section of the nuclear reactions involved in stellar nucleosynthesis are often very difficult to measure directly at stellar energies because of their very low value and/or the radiaoctive nature of the concerned isotopes, often far from the valley of stability. Moreover, this situation can be complicated by the existence of very low energy resonances and/or subthreshold resonances. Indirect methods such as transfer reactions and the ANC method offer the possibility to overcome these difficulties. In this context, the transfer reaction method will be presented and then illustrated through the study of two cases, a resonant reaction case, 12 C(α,γ) 16 O and a direct (n,γ) capture case, 60 Fe(n,γ) 61 Fe

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Measurement and DWBA analysis of the 12C(6Li, d)16O α-transfer reaction cross sections at 48.2 MeV. R-matrix analysis of 12C()16O direct capture reaction data

Cited by 63 publications

References 87 publications

The study of¹²C(α,γ) astrophysical reaction using¹²C(⁶Li,d) and¹²C(⁷Li,t) reaction at 20 MeV and in the framework of the potential model

The study of¹²C(α,γ) astrophysical reaction using¹²C(⁶Li,d) and¹²C(⁷Li,t) reaction at 20 MeV and in the framework of the potential model

Indirect techniques for astrophysical reaction rates determinations

Transfer reactions as a tool for nuclear astrophysics

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Measurement and DWBA analysis of the 12C(6Li, d)16O α-transfer reaction cross sections at 48.2 MeV. R-matrix analysis of 12C()16O direct capture reaction data

Cited by 63 publications

References 87 publications

The study of12C(α,γ) astrophysical reaction using12C(6Li,d) and12C(7Li,t) reaction at 20 MeV and in the framework of the potential model

The study of12C(α,γ) astrophysical reaction using12C(6Li,d) and12C(7Li,t) reaction at 20 MeV and in the framework of the potential model

Indirect techniques for astrophysical reaction rates determinations

Transfer reactions as a tool for nuclear astrophysics

Contact Info

Product

Resources

About

The study of¹²C(α,γ) astrophysical reaction using¹²C(⁶Li,d) and¹²C(⁷Li,t) reaction at 20 MeV and in the framework of the potential model

The study of¹²C(α,γ) astrophysical reaction using¹²C(⁶Li,d) and¹²C(⁷Li,t) reaction at 20 MeV and in the framework of the potential model