Alpha-cluster transfer reactions: A tool for understanding stellar helium burning

Shen, Y. P.; Liu, W.P.

doi:10.1016/j.ppnp.2021.103857

Cited by 6 publications

(2 citation statements)

References 228 publications

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“…The detailed table of S α /SA and ANC results of the Li 6,7 and B 11 ground states for the ( 6 Li, d), ( 7 Li, t) and ( 11 B, 7 Li) transfer systems can be found in Ref. [10].…”

Section: Experimental Techniquesmentioning

confidence: 99%

An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction

Shen

Liu

2022

EPJ Web Conf.

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Helium(4He, or α)is the second most abundant element in the observable Universe. The α-particle induced reactions such as(α, γ), (α, n) and (α, p) play a crucial role in nuclear astrophysics, especially for understanding stellar heliumburning. Because of the strong Coulomb repulsion, it is greatly hindered to directly measure the cross sections for these α-capture reactions at stellar energies. Alpha-cluster transfer reaction is a powerful tool for investigation of astrophysical(α, γ), (α, n)and(α, p)reactions since it can preferentially populate the natural-parity states with an α-cluster structure which dominantly contribute to these astrophysical α-capture reactions during stellar heliumburning. In this paper, we reviewthe theoretical scheme, theexperimental technique, astrophysical applications and the future perspectives of such approach based on α-cluster transfer reactions.

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“…The detailed table of S α /SA and ANC results of the Li 6,7 and B 11 ground states for the ( 6 Li, d), ( 7 Li, t) and ( 11 B, 7 Li) transfer systems can be found in Ref. [10].…”

Section: Experimental Techniquesmentioning

confidence: 99%

An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction

Shen

Liu

2022

EPJ Web Conf.

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“…Based on our new ANC and the R-matrix fit parameters obtained by deBoer et al (2017), we make a new R-matrix calculations to evaluate the low-energy E2 S-factor of the 12 C(α, γ) 16 O reaction. A subset of the present data (focusing on determination the GS E2 S-factor at 300 keV) has been published previously (Shen et al 2020(Shen et al , 2021. In this article, we present a detailed description of the experimental setup and give an analysis of the full data set.…”

Section: Introductionmentioning

confidence: 99%

New Determination of the ¹²C(α, γ)¹⁶O Reaction Rate and Its Impact on the Black-hole Mass Gap

Shen

deBoer²,

et al. 2023

ApJ

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We present a precise measurement of the asymptotic normalization coefficient (ANC) for the 16O ground state (GS) through the 12C(11B, 7Li)16O transfer reaction using the Quadrupole‐3‐Dipole (Q3D) magnetic spectrograph. The present work sheds light on the existing discrepancy of more than 2 orders of magnitude between the previously reported GS ANC values. This ANC is believed to have a strong effect on the 12C(α, γ)16O reaction rate by constraining the external capture to the 16O ground state, which can interfere with the high-energy tail of the 2+ subthreshold state. Based on the new ANC, we determine the astrophysical S-factor and the stellar rate of the 12C(α, γ)16O reaction. An increase of up to 21% in the total reaction rate is found within the temperature range of astrophysical relevance compared with the previous recommendation of a recent review. Finally, we evaluate the impact of our new rate on the pair-instability mass gap for black holes (BH) by evolving massive helium core stars using the MESA stellar evolution code. The updated 12C(α, γ)16O reaction rate decreases the lower and upper edges of the BH gap about 12% and 5%, respectively.

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Perspectives on Few-Body Cluster Structures in Exotic Nuclei

et al. 2023

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Alpha-cluster transfer reactions: A tool for understanding stellar helium burning

Cited by 6 publications

References 228 publications

An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction

An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction

New Determination of the ¹²C(α, γ)¹⁶O Reaction Rate and Its Impact on the Black-hole Mass Gap

Perspectives on Few-Body Cluster Structures in Exotic Nuclei

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Alpha-cluster transfer reactions: A tool for understanding stellar helium burning

Cited by 6 publications

References 228 publications

An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction

An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction

New Determination of the 12C(α, γ)16O Reaction Rate and Its Impact on the Black-hole Mass Gap

Perspectives on Few-Body Cluster Structures in Exotic Nuclei

Contact Info

Product

Resources

About

New Determination of the ¹²C(α, γ)¹⁶O Reaction Rate and Its Impact on the Black-hole Mass Gap