First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate

Daid Kahl, H. Yamaguchi, S. Kubono, A. A. Chen, A. Parikh, 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, T. Teranishi, H. TokiedaT. Yamada, C. C. Yun, L. Y. Zhang

研究成果: ジャーナルへの寄稿記事

6 引用 (Scopus)

抄録

Background: Type I x-ray bursts are the most frequently observed thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of an accreting neutron star. The S30(α,p) reaction plays a critical role in burst models, yet insufficient experimental information is available to calculate a reliable, precise rate for this reaction. Purpose: Our measurement was conducted to search for states in Ar34 and determine their quantum properties. In particular, natural-parity states with large α-decay partial widths should dominate the stellar reaction rate. Method: We performed the first measurement of S30+α resonant elastic scattering up to a center-of-mass energy of 5.5 MeV using a radioactive ion beam. The experiment utilized a thick gaseous active target system and silicon detector array in inverse kinematics. Results: We obtained an excitation function for S30(α,α) near 150 in the center-of-mass frame. The experimental data were analyzed with R-matrix calculations, and we observed three new resonant patterns between 11.1 and 12.1 MeV, extracting their properties of resonance energy, widths, spin, and parity. Conclusions: We calculated the resonant thermonuclear reaction rate of S30(α,p) based on all available experimental data of Ar34 and found an upper limit about one order of magnitude larger than a rate determined using a statistical model. The astrophysical impact of these two rates has been investigated through one-zone postprocessing type I x-ray burst calculations. We find that our new upper limit for the S30(α,p)Cl33 rate significantly affects the predicted nuclear energy generation rate during the burst.

元の言語英語
記事番号015802
ジャーナルPhysical Review C
97
発行部数1
DOI
出版物ステータス出版済み - 1 3 2018

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elastic scattering
reaction kinetics
bursts
center of mass
parity
thermonuclear explosions
thermonuclear reactions
inverse kinematics
nuclear energy
neutron stars
astrophysics
x rays
ion beams
galaxies
energy
detectors
silicon
decay
excitation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

これを引用

Kahl, D., Yamaguchi, H., Kubono, S., Chen, A. A., Parikh, A., Binh, D. N., ... Zhang, L. Y. (2018). First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate. Physical Review C, 97(1), [015802]. https://doi.org/10.1103/PhysRevC.97.015802

First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate. / Kahl, Daid; Yamaguchi, H.; Kubono, S.; Chen, A. A.; Parikh, A.; 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, T.; Tokieda, H.; Yamada, T.; Yun, C. C.; Zhang, L. Y.

:: Physical Review C, 巻 97, 番号 1, 015802, 03.01.2018.

研究成果: ジャーナルへの寄稿記事

Kahl, D, Yamaguchi, H, Kubono, S, Chen, AA, Parikh, A, 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 2018, 'First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate', Physical Review C, 巻. 97, 番号 1, 015802. https://doi.org/10.1103/PhysRevC.97.015802
Kahl, Daid ; Yamaguchi, H. ; Kubono, S. ; Chen, A. A. ; Parikh, A. ; 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, T. ; Tokieda, H. ; Yamada, T. ; Yun, C. C. ; Zhang, L. Y. / First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate. :: Physical Review C. 2018 ; 巻 97, 番号 1.
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title = "First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate",
abstract = "Background: Type I x-ray bursts are the most frequently observed thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of an accreting neutron star. The S30(α,p) reaction plays a critical role in burst models, yet insufficient experimental information is available to calculate a reliable, precise rate for this reaction. Purpose: Our measurement was conducted to search for states in Ar34 and determine their quantum properties. In particular, natural-parity states with large α-decay partial widths should dominate the stellar reaction rate. Method: We performed the first measurement of S30+α resonant elastic scattering up to a center-of-mass energy of 5.5 MeV using a radioactive ion beam. The experiment utilized a thick gaseous active target system and silicon detector array in inverse kinematics. Results: We obtained an excitation function for S30(α,α) near 150 in the center-of-mass frame. The experimental data were analyzed with R-matrix calculations, and we observed three new resonant patterns between 11.1 and 12.1 MeV, extracting their properties of resonance energy, widths, spin, and parity. Conclusions: We calculated the resonant thermonuclear reaction rate of S30(α,p) based on all available experimental data of Ar34 and found an upper limit about one order of magnitude larger than a rate determined using a statistical model. The astrophysical impact of these two rates has been investigated through one-zone postprocessing type I x-ray burst calculations. We find that our new upper limit for the S30(α,p)Cl33 rate significantly affects the predicted nuclear energy generation rate during the burst.",
author = "Daid Kahl and H. Yamaguchi and S. Kubono and Chen, {A. A.} and A. Parikh and Binh, {D. N.} and J. Chen and S. Cherubini and Duy, {N. N.} and T. Hashimoto and S. Hayakawa and N. Iwasa and Jung, {H. S.} and S. Kato and Kwon, {Y. K.} and S. Nishimura and S. Ota and K. Setoodehnia and T. Teranishi and H. Tokieda and T. Yamada and Yun, {C. C.} and Zhang, {L. Y.}",
year = "2018",
month = "1",
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journal = "Physical Review C",
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TY - JOUR

T1 - First measurement of S 30 +α resonant elastic scattering for the S 30 (α,p) reaction rate

AU - Kahl, Daid

AU - Yamaguchi, H.

AU - Kubono, S.

AU - Chen, A. A.

AU - Parikh, A.

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, T.

AU - Tokieda, H.

AU - Yamada, T.

AU - Yun, C. C.

AU - Zhang, L. Y.

PY - 2018/1/3

Y1 - 2018/1/3

N2 - Background: Type I x-ray bursts are the most frequently observed thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of an accreting neutron star. The S30(α,p) reaction plays a critical role in burst models, yet insufficient experimental information is available to calculate a reliable, precise rate for this reaction. Purpose: Our measurement was conducted to search for states in Ar34 and determine their quantum properties. In particular, natural-parity states with large α-decay partial widths should dominate the stellar reaction rate. Method: We performed the first measurement of S30+α resonant elastic scattering up to a center-of-mass energy of 5.5 MeV using a radioactive ion beam. The experiment utilized a thick gaseous active target system and silicon detector array in inverse kinematics. Results: We obtained an excitation function for S30(α,α) near 150 in the center-of-mass frame. The experimental data were analyzed with R-matrix calculations, and we observed three new resonant patterns between 11.1 and 12.1 MeV, extracting their properties of resonance energy, widths, spin, and parity. Conclusions: We calculated the resonant thermonuclear reaction rate of S30(α,p) based on all available experimental data of Ar34 and found an upper limit about one order of magnitude larger than a rate determined using a statistical model. The astrophysical impact of these two rates has been investigated through one-zone postprocessing type I x-ray burst calculations. We find that our new upper limit for the S30(α,p)Cl33 rate significantly affects the predicted nuclear energy generation rate during the burst.

AB - Background: Type I x-ray bursts are the most frequently observed thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of an accreting neutron star. The S30(α,p) reaction plays a critical role in burst models, yet insufficient experimental information is available to calculate a reliable, precise rate for this reaction. Purpose: Our measurement was conducted to search for states in Ar34 and determine their quantum properties. In particular, natural-parity states with large α-decay partial widths should dominate the stellar reaction rate. Method: We performed the first measurement of S30+α resonant elastic scattering up to a center-of-mass energy of 5.5 MeV using a radioactive ion beam. The experiment utilized a thick gaseous active target system and silicon detector array in inverse kinematics. Results: We obtained an excitation function for S30(α,α) near 150 in the center-of-mass frame. The experimental data were analyzed with R-matrix calculations, and we observed three new resonant patterns between 11.1 and 12.1 MeV, extracting their properties of resonance energy, widths, spin, and parity. Conclusions: We calculated the resonant thermonuclear reaction rate of S30(α,p) based on all available experimental data of Ar34 and found an upper limit about one order of magnitude larger than a rate determined using a statistical model. The astrophysical impact of these two rates has been investigated through one-zone postprocessing type I x-ray burst calculations. We find that our new upper limit for the S30(α,p)Cl33 rate significantly affects the predicted nuclear energy generation rate during the burst.

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