High-precision (p,t) reaction measurement to determine Ne18(α,p)Na21 reaction rates

A. Matic; A. M. Van Der Berg; M. N. Harakeh; H. J. Wörtche; G. P.A. Berg; M. Couder; J. L. Fisker; J. Görres; P. Leblanc; S. O'Brien; M. Wiescher; K. Fujita; K. Hatanaka; Y. Sakemi; Y. Shimizu; Y. Tameshige; A. Tamii; M. Yosoi; T. Adachi; Y. Fujita; Y. Shimbara; H. Fujita; T. Wakasa; P. O. Hess; B. A. Brown; H. Schatz

doi:10.1103/PhysRevC.80.055804

High-precision (p,t) reaction measurement to determine Ne18(α,p)Na21 reaction rates

A. Matic, A. M. Van Der Berg, M. N. Harakeh, H. J. Wörtche, G. P.A. Berg, M. Couder, J. L. Fisker, J. Görres, P. Leblanc, S. O'Brien, M. Wiescher, K. Fujita, K. Hatanaka, Y. Sakemi, Y. Shimizu, Y. Tameshige, A. Tamii, M. Yosoi, T. Adachi, Y. FujitaY. Shimbara, H. Fujita, T. Wakasa, P. O. Hess, B. A. Brown, H. Schatz

Experimental Particle Physics

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Abstract

x-ray bursts are identified as thermonuclear explosions in the outer atmosphere of accreting neutron stars. The thermonuclear runaway is fueled by the αp process that describes a sequence of (α,p) reactions triggered by the Ne18(α,p)Na21 breakout reaction from the hot CNO cycles. We studied the level structure of the compound nucleus Mg22 by measuring the Mg24(p,t)Mg22 reaction at the Grand Raiden spectrometer at Research Center for Nuclear Physics, Osaka. A large number of α-unbound states was identified and precise excitation energies were determined. Based on shell model and α-cluster model calculations we predict the level parameters for determining the stellar reaction rate of Ne18(α,p)Na21 for a wide temperature range. x-ray burst simulations have been performed to study the impact of the reaction on the x-ray burst luminosity.

Original language	English
Article number	055804
Journal	Physical Review C - Nuclear Physics
Volume	80
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.80.055804
Publication status	Published - Nov 16 2009

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.80.055804

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Matic, A., Van Der Berg, A. M., Harakeh, M. N., Wörtche, H. J., Berg, G. P. A., Couder, M., Fisker, J. L., Görres, J., Leblanc, P., O'Brien, S., Wiescher, M., Fujita, K., Hatanaka, K., Sakemi, Y., Shimizu, Y., Tameshige, Y., Tamii, A., Yosoi, M., Adachi, T., ... Schatz, H. (2009). High-precision (p,t) reaction measurement to determine Ne18(α,p)Na21 reaction rates. Physical Review C - Nuclear Physics, 80(5), [055804]. https://doi.org/10.1103/PhysRevC.80.055804

Matic, A, Van Der Berg, AM, Harakeh, MN, Wörtche, HJ, Berg, GPA, Couder, M, Fisker, JL, Görres, J, Leblanc, P, O'Brien, S, Wiescher, M, Fujita, K, Hatanaka, K, Sakemi, Y, Shimizu, Y, Tameshige, Y, Tamii, A, Yosoi, M, Adachi, T, Fujita, Y, Shimbara, Y, Fujita, H, Wakasa, T, Hess, PO, Brown, BA & Schatz, H 2009, 'High-precision (p,t) reaction measurement to determine Ne18(α,p)Na21 reaction rates', Physical Review C - Nuclear Physics, vol. 80, no. 5, 055804. https://doi.org/10.1103/PhysRevC.80.055804

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title = "High-precision (p,t) reaction measurement to determine Ne18(α,p)Na21 reaction rates",

abstract = "x-ray bursts are identified as thermonuclear explosions in the outer atmosphere of accreting neutron stars. The thermonuclear runaway is fueled by the αp process that describes a sequence of (α,p) reactions triggered by the Ne18(α,p)Na21 breakout reaction from the hot CNO cycles. We studied the level structure of the compound nucleus Mg22 by measuring the Mg24(p,t)Mg22 reaction at the Grand Raiden spectrometer at Research Center for Nuclear Physics, Osaka. A large number of α-unbound states was identified and precise excitation energies were determined. Based on shell model and α-cluster model calculations we predict the level parameters for determining the stellar reaction rate of Ne18(α,p)Na21 for a wide temperature range. x-ray burst simulations have been performed to study the impact of the reaction on the x-ray burst luminosity.",

author = "A. Matic and {Van Der Berg}, {A. M.} and Harakeh, {M. N.} and W{\"o}rtche, {H. J.} and Berg, {G. P.A.} and M. Couder and Fisker, {J. L.} and J. G{\"o}rres and P. Leblanc and S. O'Brien and M. Wiescher and K. Fujita and K. Hatanaka and Y. Sakemi and Y. Shimizu and Y. Tameshige and A. Tamii and M. Yosoi and T. Adachi and Y. Fujita and Y. Shimbara and H. Fujita and T. Wakasa and Hess, {P. O.} and Brown, {B. A.} and H. Schatz",

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AU - Matic, A.

AU - Van Der Berg, A. M.

AU - Harakeh, M. N.

AU - Wörtche, H. J.

AU - Berg, G. P.A.

AU - Couder, M.

AU - Fisker, J. L.

AU - Görres, J.

AU - Leblanc, P.

AU - O'Brien, S.

AU - Wiescher, M.

AU - Fujita, K.

AU - Hatanaka, K.

AU - Sakemi, Y.

AU - Shimizu, Y.

AU - Tameshige, Y.

AU - Tamii, A.

AU - Yosoi, M.

AU - Adachi, T.

AU - Fujita, Y.

AU - Shimbara, Y.

AU - Fujita, H.

AU - Wakasa, T.

AU - Hess, P. O.

AU - Brown, B. A.

AU - Schatz, H.

PY - 2009/11/16

Y1 - 2009/11/16

N2 - x-ray bursts are identified as thermonuclear explosions in the outer atmosphere of accreting neutron stars. The thermonuclear runaway is fueled by the αp process that describes a sequence of (α,p) reactions triggered by the Ne18(α,p)Na21 breakout reaction from the hot CNO cycles. We studied the level structure of the compound nucleus Mg22 by measuring the Mg24(p,t)Mg22 reaction at the Grand Raiden spectrometer at Research Center for Nuclear Physics, Osaka. A large number of α-unbound states was identified and precise excitation energies were determined. Based on shell model and α-cluster model calculations we predict the level parameters for determining the stellar reaction rate of Ne18(α,p)Na21 for a wide temperature range. x-ray burst simulations have been performed to study the impact of the reaction on the x-ray burst luminosity.

AB - x-ray bursts are identified as thermonuclear explosions in the outer atmosphere of accreting neutron stars. The thermonuclear runaway is fueled by the αp process that describes a sequence of (α,p) reactions triggered by the Ne18(α,p)Na21 breakout reaction from the hot CNO cycles. We studied the level structure of the compound nucleus Mg22 by measuring the Mg24(p,t)Mg22 reaction at the Grand Raiden spectrometer at Research Center for Nuclear Physics, Osaka. A large number of α-unbound states was identified and precise excitation energies were determined. Based on shell model and α-cluster model calculations we predict the level parameters for determining the stellar reaction rate of Ne18(α,p)Na21 for a wide temperature range. x-ray burst simulations have been performed to study the impact of the reaction on the x-ray burst luminosity.

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High-precision (p,t) reaction measurement to determine Ne18(α,p)Na21 reaction rates

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