Strength measurement of the Eαlab =830 keV resonance in the Ne 22 (α,n) Mg 25 reaction using a stilbene detector

Shahina; R. J. Deboer; J. Görres; R. Fang; M. Febbraro; R. Kelmar; M. Matney; K. Manukyan; J. T. Nattress; E. Robles; T. J. Ruland; T. T. King; A. Sanchez; R. S. Sidhu; E. Stech; M. Wiescher

doi:10.1103/PhysRevC.110.015801

Strength measurement of the Eαlab =830 keV resonance in the Ne 22 (α,n) Mg 25 reaction using a stilbene detector

Shahina, R. J. Deboer, J. Görres, R. Fang, M. Febbraro, R. Kelmar, M. Matney, K. Manukyan, J. T. Nattress, E. Robles, T. J. Ruland, T. T. King, A. Sanchez, R. S. Sidhu, E. Stech, M. Wiescher

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Abstract

The interplay between the Ne22(α,γ)Mg26 reaction and the competing Ne22(α,n)Mg25 reaction determines the efficiency of the latter as a neutron source at the temperatures of stellar helium burning. In both cases, the rates are dominated by the α-cluster resonance at 830 keV. This resonance plays a particularly important role in determining the strength of the neutron flux for both the weak and main s process as well as the n process. Recent experimental studies based on transfer reactions suggest that the neutron and γ-ray strengths for this resonance are approximately equal. In this study, the Ne22(α,n)Mg25 resonance strength has been remeasured and found to be similar to the previous direct studies. This reinforces an 830 keV resonance strength that is approximately a factor of 3 larger for the Ne22(α,n)Mg25 reaction than for the Ne22(α,γ)Mg26 reaction.

Original language	English
Article number	015801
Journal	Physical Review C
Volume	110
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.110.015801
State	Published - Jul 2024

Funding

We are grateful to Gy\u00F6rgy Gy\u00FCrky for providing the target used in this research. This research was supported by the National Science Foundation through Grant No. PHY-2011890 (University of Notre Dame Nuclear Science Laboratory), Grant No. PHY-1430152 (the Joint Institute for Nuclear Astrophysics - Center for the Evolution of the Elements),and Grant No. OISE-1927130 (IReNA). R.S.S. acknowledges funding from STFC (Grant No. ST/P004008/1) and the Royal Society International Exchanges Grant (IESR2232267). We are grateful to Gy\u00F6rgy Gy\u00FCrky for providing the C13 target used in this research. This research was supported by the National Science Foundation through Grant No. PHY-2011890 (University of Notre Dame Nuclear Science Laboratory), Grant No. PHY-1430152 (the Joint Institute for Nuclear Astrophysics - Center for the Evolution of the Elements),and Grant No. OISE-1927130 (IReNA). R.S.S. acknowledges funding from STFC (Grant No. ST/P004008/1) and the Royal Society International Exchanges Grant (IESR2232267).

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Shahina, Deboer, R. J., Görres, J., Fang, R., Febbraro, M., Kelmar, R., Matney, M., Manukyan, K., Nattress, J. T., Robles, E., Ruland, T. J., King, T. T., Sanchez, A., Sidhu, R. S., Stech, E., & Wiescher, M. (2024). Strength measurement of the Eαlab =830 keV resonance in the Ne 22 (α,n) Mg 25 reaction using a stilbene detector. Physical Review C, 110(1), Article 015801. https://doi.org/10.1103/PhysRevC.110.015801

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title = "Strength measurement of the Eαlab =830 keV resonance in the Ne 22 (α,n) Mg 25 reaction using a stilbene detector",

abstract = "The interplay between the Ne22(α,γ)Mg26 reaction and the competing Ne22(α,n)Mg25 reaction determines the efficiency of the latter as a neutron source at the temperatures of stellar helium burning. In both cases, the rates are dominated by the α-cluster resonance at 830 keV. This resonance plays a particularly important role in determining the strength of the neutron flux for both the weak and main s process as well as the n process. Recent experimental studies based on transfer reactions suggest that the neutron and γ-ray strengths for this resonance are approximately equal. In this study, the Ne22(α,n)Mg25 resonance strength has been remeasured and found to be similar to the previous direct studies. This reinforces an 830 keV resonance strength that is approximately a factor of 3 larger for the Ne22(α,n)Mg25 reaction than for the Ne22(α,γ)Mg26 reaction.",

author = "Shahina and Deboer, {R. J.} and J. G{\"o}rres and R. Fang and M. Febbraro and R. Kelmar and M. Matney and K. Manukyan and Nattress, {J. T.} and E. Robles and Ruland, {T. J.} and King, {T. T.} and A. Sanchez and Sidhu, {R. S.} and E. Stech and M. Wiescher",

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year = "2024",

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doi = "10.1103/PhysRevC.110.015801",

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Shahina, Deboer, RJ, Görres, J, Fang, R, Febbraro, M, Kelmar, R, Matney, M, Manukyan, K, Nattress, JT, Robles, E, Ruland, TJ , King, TT, Sanchez, A, Sidhu, RS, Stech, E & Wiescher, M 2024, 'Strength measurement of the Eαlab =830 keV resonance in the Ne 22 (α,n) Mg 25 reaction using a stilbene detector', Physical Review C, vol. 110, no. 1, 015801. https://doi.org/10.1103/PhysRevC.110.015801

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AU - Shahina,

AU - Deboer, R. J.

AU - Görres, J.

AU - Fang, R.

AU - Febbraro, M.

AU - Kelmar, R.

AU - Matney, M.

AU - Manukyan, K.

AU - Nattress, J. T.

AU - Robles, E.

AU - Ruland, T. J.

AU - King, T. T.

AU - Sanchez, A.

AU - Sidhu, R. S.

AU - Stech, E.

AU - Wiescher, M.

PY - 2024/7

Y1 - 2024/7

N2 - The interplay between the Ne22(α,γ)Mg26 reaction and the competing Ne22(α,n)Mg25 reaction determines the efficiency of the latter as a neutron source at the temperatures of stellar helium burning. In both cases, the rates are dominated by the α-cluster resonance at 830 keV. This resonance plays a particularly important role in determining the strength of the neutron flux for both the weak and main s process as well as the n process. Recent experimental studies based on transfer reactions suggest that the neutron and γ-ray strengths for this resonance are approximately equal. In this study, the Ne22(α,n)Mg25 resonance strength has been remeasured and found to be similar to the previous direct studies. This reinforces an 830 keV resonance strength that is approximately a factor of 3 larger for the Ne22(α,n)Mg25 reaction than for the Ne22(α,γ)Mg26 reaction.

AB - The interplay between the Ne22(α,γ)Mg26 reaction and the competing Ne22(α,n)Mg25 reaction determines the efficiency of the latter as a neutron source at the temperatures of stellar helium burning. In both cases, the rates are dominated by the α-cluster resonance at 830 keV. This resonance plays a particularly important role in determining the strength of the neutron flux for both the weak and main s process as well as the n process. Recent experimental studies based on transfer reactions suggest that the neutron and γ-ray strengths for this resonance are approximately equal. In this study, the Ne22(α,n)Mg25 resonance strength has been remeasured and found to be similar to the previous direct studies. This reinforces an 830 keV resonance strength that is approximately a factor of 3 larger for the Ne22(α,n)Mg25 reaction than for the Ne22(α,γ)Mg26 reaction.

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Strength measurement of the Eαlab =830 keV resonance in the Ne 22 (α,n) Mg 25 reaction using a stilbene detector

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