Experimental investigation of the 30 S(α, p) thermonuclear reaction in x-ray bursts

D. Kahl, A. A. Chen, S. Kubono, H. Yamaguchi, D. N. Binh, J. Chen, S. Cherubini, N. N. Duy, T. Hashimoto, S. Hayakawa, N. Iwasa, H. S. Jung, S. Kato, Y. K. Kwon, S. Nishimura, S. Ota, K. Setoodehnia, Takashi Teranishi, H. Tokieda, T. YamadaC. C. Yun, L. Y. Zhang

Research output: Contribution to journalConference article

Abstract

We performed the first measurement of 30 S resonant elastic scattering to experimentally examine the 30 S(α, p) stellar reaction rate in type I x-ray bursts. These bursts are the most frequent thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of accreting neutron star binaries. The 30 S(α, p) reaction plays a critical role in burst models, yet very little is known about the compound nucleus 34 Ar at these energies nor the reaction rate itself. We performed a measurement of alpha elastic scattering with a radioactive beam of 30 S to experimentally probe the entrance channel. Utilizing a gaseous active target system and silicon detector array, we extracted the excitation function from 1.8 to 5.5 MeV near 160° in the center-of-mass frame. The experimental data were analyzed with an R-Matrix calculation, and we discovered several new resonances and extracted their quantum properties (resonance energy, width, spin, and parity). Finally, we calculated the narrow resonant thermonuclear reaction rate of 30 S(α, p) for these new resonances.

Original languageEnglish
Article number04005
JournalEPJ Web of Conferences
Volume109
DOIs
Publication statusPublished - Feb 12 2016
Event13th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2015 - Beijing, China
Duration: Jun 24 2015Jun 27 2015

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thermonuclear reactions
bursts
reaction kinetics
elastic scattering
thermonuclear explosions
x rays
entrances
neutron stars
center of mass
parity
galaxies
nuclei
energy
probes
detectors
silicon
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Kahl, D., Chen, A. A., Kubono, S., Yamaguchi, H., Binh, D. N., Chen, J., ... Zhang, L. Y. (2016). Experimental investigation of the 30 S(α, p) thermonuclear reaction in x-ray bursts EPJ Web of Conferences, 109, [04005]. https://doi.org/10.1051/epjconf/201610904005

Experimental investigation of the 30 S(α, p) thermonuclear reaction in x-ray bursts . / Kahl, D.; Chen, A. A.; Kubono, S.; Yamaguchi, H.; Binh, D. N.; Chen, J.; Cherubini, S.; Duy, N. N.; Hashimoto, T.; Hayakawa, S.; Iwasa, N.; Jung, H. S.; Kato, S.; Kwon, Y. K.; Nishimura, S.; Ota, S.; Setoodehnia, K.; Teranishi, Takashi; Tokieda, H.; Yamada, T.; Yun, C. C.; Zhang, L. Y.

In: EPJ Web of Conferences, Vol. 109, 04005, 12.02.2016.

Research output: Contribution to journalConference article

Kahl, D, Chen, AA, Kubono, S, Yamaguchi, H, Binh, DN, Chen, J, Cherubini, S, Duy, NN, Hashimoto, T, Hayakawa, S, Iwasa, N, Jung, HS, Kato, S, Kwon, YK, Nishimura, S, Ota, S, Setoodehnia, K, Teranishi, T, Tokieda, H, Yamada, T, Yun, CC & Zhang, LY 2016, ' Experimental investigation of the 30 S(α, p) thermonuclear reaction in x-ray bursts ', EPJ Web of Conferences, vol. 109, 04005. https://doi.org/10.1051/epjconf/201610904005
Kahl, D. ; Chen, A. A. ; Kubono, S. ; Yamaguchi, H. ; Binh, D. N. ; Chen, J. ; Cherubini, S. ; Duy, N. N. ; Hashimoto, T. ; Hayakawa, S. ; Iwasa, N. ; Jung, H. S. ; Kato, S. ; Kwon, Y. K. ; Nishimura, S. ; Ota, S. ; Setoodehnia, K. ; Teranishi, Takashi ; Tokieda, H. ; Yamada, T. ; Yun, C. C. ; Zhang, L. Y. / Experimental investigation of the 30 S(α, p) thermonuclear reaction in x-ray bursts In: EPJ Web of Conferences. 2016 ; Vol. 109.
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abstract = "We performed the first measurement of 30 S +α resonant elastic scattering to experimentally examine the 30 S(α, p) stellar reaction rate in type I x-ray bursts. These bursts are the most frequent thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of accreting neutron star binaries. The 30 S(α, p) reaction plays a critical role in burst models, yet very little is known about the compound nucleus 34 Ar at these energies nor the reaction rate itself. We performed a measurement of alpha elastic scattering with a radioactive beam of 30 S to experimentally probe the entrance channel. Utilizing a gaseous active target system and silicon detector array, we extracted the excitation function from 1.8 to 5.5 MeV near 160° in the center-of-mass frame. The experimental data were analyzed with an R-Matrix calculation, and we discovered several new resonances and extracted their quantum properties (resonance energy, width, spin, and parity). Finally, we calculated the narrow resonant thermonuclear reaction rate of 30 S(α, p) for these new resonances.",
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T1 - Experimental investigation of the 30 S(α, p) thermonuclear reaction in x-ray bursts

AU - Kahl, D.

AU - Chen, A. A.

AU - Kubono, S.

AU - Yamaguchi, H.

AU - Binh, D. N.

AU - Chen, J.

AU - Cherubini, S.

AU - Duy, N. N.

AU - Hashimoto, T.

AU - Hayakawa, S.

AU - Iwasa, N.

AU - Jung, H. S.

AU - Kato, S.

AU - Kwon, Y. K.

AU - Nishimura, S.

AU - Ota, S.

AU - Setoodehnia, K.

AU - Teranishi, Takashi

AU - Tokieda, H.

AU - Yamada, T.

AU - Yun, C. C.

AU - Zhang, L. Y.

PY - 2016/2/12

Y1 - 2016/2/12

N2 - We performed the first measurement of 30 S +α resonant elastic scattering to experimentally examine the 30 S(α, p) stellar reaction rate in type I x-ray bursts. These bursts are the most frequent thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of accreting neutron star binaries. The 30 S(α, p) reaction plays a critical role in burst models, yet very little is known about the compound nucleus 34 Ar at these energies nor the reaction rate itself. We performed a measurement of alpha elastic scattering with a radioactive beam of 30 S to experimentally probe the entrance channel. Utilizing a gaseous active target system and silicon detector array, we extracted the excitation function from 1.8 to 5.5 MeV near 160° in the center-of-mass frame. The experimental data were analyzed with an R-Matrix calculation, and we discovered several new resonances and extracted their quantum properties (resonance energy, width, spin, and parity). Finally, we calculated the narrow resonant thermonuclear reaction rate of 30 S(α, p) for these new resonances.

AB - We performed the first measurement of 30 S +α resonant elastic scattering to experimentally examine the 30 S(α, p) stellar reaction rate in type I x-ray bursts. These bursts are the most frequent thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of accreting neutron star binaries. The 30 S(α, p) reaction plays a critical role in burst models, yet very little is known about the compound nucleus 34 Ar at these energies nor the reaction rate itself. We performed a measurement of alpha elastic scattering with a radioactive beam of 30 S to experimentally probe the entrance channel. Utilizing a gaseous active target system and silicon detector array, we extracted the excitation function from 1.8 to 5.5 MeV near 160° in the center-of-mass frame. The experimental data were analyzed with an R-Matrix calculation, and we discovered several new resonances and extracted their quantum properties (resonance energy, width, spin, and parity). Finally, we calculated the narrow resonant thermonuclear reaction rate of 30 S(α, p) for these new resonances.

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