Active target studies of the α p -process at CRIB

D. Kahl, T. Hashimoto, N. N. Duy, S. Kubono, H. Yamaguchi, D. N. Binh, A. A. Chen, S. Cherubini, S. Hayakawa, J. J. He, H. Ishiyama, N. Iwasa, L. H. Khiem, Y. K. Kwon, S. Michimasa, T. Nakao, S. Ota, T. Teranishi, H. Tokieda, Y. WakabayashiT. Yamada, L. Y. Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

The αp-process is a sequence of (α, p)(p, γ) reactions important to the nuclear trajectory to higher masses in type I X-ray bursts. Specifically, the αp-process is schematically pure helium-burning, and thus unlike pure hydrogen-burning processes, does not require slow β+ decays. Explosive helium burning is responsible for the observed short rise-times of X-ray bursts but ultimately gives way to the rp-process as the Coulomb barrier increases. Because the stellar reaction rates of these (α, p) reactions are poorly known over the relevant astrophysical energies, we performed systematic studies of the 18Ne(α,p), 22Mg(α,p) and 30S(α,p) reactions at the Center for Nuclear Study (CNS) low-energy radioactive ion beam separator, called CRIB. We produce the radioactive beams in-flight and scan the center-of-mass energy down into the Gamow Window using a thick target in inverse kinematics. The helium target gas also serves as part of the detector system, an active target, which was newly designed for these measurements. The active target, which uses gas electron multiplier (GEM) foils, allows for higher beam injection rates than previous multi-sampling and tracking proportional counters (MSTPC). We present a summary of our recent results from these active target experiments at CRIB.

Original languageEnglish
Title of host publicationOrigin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
PublisherAmerican Institute of Physics Inc.
Pages163-170
Number of pages8
ISBN (Print)9780735412286
DOIs
Publication statusPublished - Jan 1 2014
Event12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 - Tsukuba, Japan
Duration: Nov 18 2013Nov 21 2013

Publication series

NameAIP Conference Proceedings
Volume1594
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
CountryJapan
CityTsukuba
Period11/18/1311/21/13

Fingerprint

helium
bursts
inverse kinematics
beam injection
proportional counters
photomultiplier tubes
separators
gases
center of mass
energy
foils
astrophysics
reaction kinetics
x rays
ion beams
sampling
trajectories
flight
detectors
decay

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Kahl, D., Hashimoto, T., Duy, N. N., Kubono, S., Yamaguchi, H., Binh, D. N., ... Zhang, L. Y. (2014). Active target studies of the α p -process at CRIB. In Origin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 (pp. 163-170). (AIP Conference Proceedings; Vol. 1594). American Institute of Physics Inc.. https://doi.org/10.1063/1.4874062

Active target studies of the α p -process at CRIB. / Kahl, D.; Hashimoto, T.; Duy, N. N.; Kubono, S.; Yamaguchi, H.; Binh, D. N.; Chen, A. A.; Cherubini, S.; Hayakawa, S.; He, J. J.; Ishiyama, H.; Iwasa, N.; Khiem, L. H.; Kwon, Y. K.; Michimasa, S.; Nakao, T.; Ota, S.; Teranishi, T.; Tokieda, H.; Wakabayashi, Y.; Yamada, T.; Zhang, L. Y.

Origin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013. American Institute of Physics Inc., 2014. p. 163-170 (AIP Conference Proceedings; Vol. 1594).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kahl, D, Hashimoto, T, Duy, NN, Kubono, S, Yamaguchi, H, Binh, DN, Chen, AA, Cherubini, S, Hayakawa, S, He, JJ, Ishiyama, H, Iwasa, N, Khiem, LH, Kwon, YK, Michimasa, S, Nakao, T, Ota, S, Teranishi, T, Tokieda, H, Wakabayashi, Y, Yamada, T & Zhang, LY 2014, Active target studies of the α p -process at CRIB. in Origin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013. AIP Conference Proceedings, vol. 1594, American Institute of Physics Inc., pp. 163-170, 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013, Tsukuba, Japan, 11/18/13. https://doi.org/10.1063/1.4874062
Kahl D, Hashimoto T, Duy NN, Kubono S, Yamaguchi H, Binh DN et al. Active target studies of the α p -process at CRIB. In Origin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013. American Institute of Physics Inc. 2014. p. 163-170. (AIP Conference Proceedings). https://doi.org/10.1063/1.4874062
Kahl, D. ; Hashimoto, T. ; Duy, N. N. ; Kubono, S. ; Yamaguchi, H. ; Binh, D. N. ; Chen, A. A. ; Cherubini, S. ; Hayakawa, S. ; He, J. J. ; Ishiyama, H. ; Iwasa, N. ; Khiem, L. H. ; Kwon, Y. K. ; Michimasa, S. ; Nakao, T. ; Ota, S. ; Teranishi, T. ; Tokieda, H. ; Wakabayashi, Y. ; Yamada, T. ; Zhang, L. Y. / Active target studies of the α p -process at CRIB. Origin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013. American Institute of Physics Inc., 2014. pp. 163-170 (AIP Conference Proceedings).
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abstract = "The αp-process is a sequence of (α, p)(p, γ) reactions important to the nuclear trajectory to higher masses in type I X-ray bursts. Specifically, the αp-process is schematically pure helium-burning, and thus unlike pure hydrogen-burning processes, does not require slow β+ decays. Explosive helium burning is responsible for the observed short rise-times of X-ray bursts but ultimately gives way to the rp-process as the Coulomb barrier increases. Because the stellar reaction rates of these (α, p) reactions are poorly known over the relevant astrophysical energies, we performed systematic studies of the 18Ne(α,p), 22Mg(α,p) and 30S(α,p) reactions at the Center for Nuclear Study (CNS) low-energy radioactive ion beam separator, called CRIB. We produce the radioactive beams in-flight and scan the center-of-mass energy down into the Gamow Window using a thick target in inverse kinematics. The helium target gas also serves as part of the detector system, an active target, which was newly designed for these measurements. The active target, which uses gas electron multiplier (GEM) foils, allows for higher beam injection rates than previous multi-sampling and tracking proportional counters (MSTPC). We present a summary of our recent results from these active target experiments at CRIB.",
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AU - Binh, D. N.

AU - Chen, A. A.

AU - Cherubini, S.

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AU - He, J. J.

AU - Ishiyama, H.

AU - Iwasa, N.

AU - Khiem, L. H.

AU - Kwon, Y. K.

AU - Michimasa, S.

AU - Nakao, T.

AU - Ota, S.

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AU - Tokieda, H.

AU - Wakabayashi, Y.

AU - Yamada, T.

AU - Zhang, L. Y.

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AB - The αp-process is a sequence of (α, p)(p, γ) reactions important to the nuclear trajectory to higher masses in type I X-ray bursts. Specifically, the αp-process is schematically pure helium-burning, and thus unlike pure hydrogen-burning processes, does not require slow β+ decays. Explosive helium burning is responsible for the observed short rise-times of X-ray bursts but ultimately gives way to the rp-process as the Coulomb barrier increases. Because the stellar reaction rates of these (α, p) reactions are poorly known over the relevant astrophysical energies, we performed systematic studies of the 18Ne(α,p), 22Mg(α,p) and 30S(α,p) reactions at the Center for Nuclear Study (CNS) low-energy radioactive ion beam separator, called CRIB. We produce the radioactive beams in-flight and scan the center-of-mass energy down into the Gamow Window using a thick target in inverse kinematics. The helium target gas also serves as part of the detector system, an active target, which was newly designed for these measurements. The active target, which uses gas electron multiplier (GEM) foils, allows for higher beam injection rates than previous multi-sampling and tracking proportional counters (MSTPC). We present a summary of our recent results from these active target experiments at CRIB.

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