High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates

A. Matic; A. M. Van Den Berg; M. N. Harakeh; H. J. Wörtche; M. Beard; G. P.A. Berg; 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; J. P. Greene; R. Crowter; H. Schatz

doi:10.1103/PhysRevC.84.025801

High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates

A. Matic, A. M. Van Den Berg, M. N. Harakeh, H. J. Wörtche, M. Beard, G. P.A. Berg, 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. ShimbaraH. Fujita, T. Wakasa, J. P. Greene, R. Crowter, H. Schatz

Experimental Particle Physics

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The rise time of stellar x-ray bursts is a signature of thermonuclear runaway processes in the atmosphere of neutron stars and is highly sensitive to a series of (α,p) reactions via high-lying resonances in sd-shell nuclei. Lacking data for the relevant resonance levels, the stellar reaction rates have been calculated using statistical, Hauser-Feshbach models, assuming a high-level density. This assumption may not be correct in view of the selectivity of the (α,p) reaction to natural parity states. We measured the 28Si(p,t)26Si reaction with a high-resolution spectrometer to identify resonance levels in 26Si above the α-emission threshold at 9.164 MeV excitation energy. These resonance levels are used to calculate the stellar reaction rate of the 22Mg(α,p)25Al reaction and to test the validity of the statistical assumption.

Original language	English
Article number	025801
Journal	Physical Review C - Nuclear Physics
Volume	84
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.84.025801
Publication status	Published - Aug 24 2011

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevC.84.025801

Cite this

Matic, A., Van Den Berg, A. M., Harakeh, M. N., Wörtche, H. J., Beard, M., Berg, G. P. A., 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., ... Schatz, H. (2011). High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates. Physical Review C - Nuclear Physics, 84(2), [025801]. https://doi.org/10.1103/PhysRevC.84.025801

High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates. / Matic, A.; Van Den Berg, A. M.; Harakeh, M. N.; Wörtche, H. J.; Beard, M.; Berg, G. P.A.; 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.; Greene, J. P.; Crowter, R.; Schatz, H.

In: Physical Review C - Nuclear Physics, Vol. 84, No. 2, 025801, 24.08.2011.

Research output: Contribution to journal › Article › peer-review

Matic, A, Van Den Berg, AM, Harakeh, MN, Wörtche, HJ, Beard, M, Berg, GPA, 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, Greene, JP, Crowter, R & Schatz, H 2011, 'High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates', Physical Review C - Nuclear Physics, vol. 84, no. 2, 025801. https://doi.org/10.1103/PhysRevC.84.025801

Matic, A. ; Van Den Berg, A. M. ; Harakeh, M. N. ; Wörtche, H. J. ; Beard, M. ; Berg, G. P.A. ; 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. ; Greene, J. P. ; Crowter, R. ; Schatz, H. / High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates. In: Physical Review C - Nuclear Physics. 2011 ; Vol. 84, No. 2.

@article{f328ad97ebeb40189992d3bbe7715c19,

title = "High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates",

abstract = "The rise time of stellar x-ray bursts is a signature of thermonuclear runaway processes in the atmosphere of neutron stars and is highly sensitive to a series of (α,p) reactions via high-lying resonances in sd-shell nuclei. Lacking data for the relevant resonance levels, the stellar reaction rates have been calculated using statistical, Hauser-Feshbach models, assuming a high-level density. This assumption may not be correct in view of the selectivity of the (α,p) reaction to natural parity states. We measured the 28Si(p,t)26Si reaction with a high-resolution spectrometer to identify resonance levels in 26Si above the α-emission threshold at 9.164 MeV excitation energy. These resonance levels are used to calculate the stellar reaction rate of the 22Mg(α,p)25Al reaction and to test the validity of the statistical assumption.",

author = "A. Matic and {Van Den Berg}, {A. M.} and Harakeh, {M. N.} and W{\"o}rtche, {H. J.} and M. Beard and Berg, {G. P.A.} 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 Greene, {J. P.} and R. Crowter and H. Schatz",

year = "2011",

month = aug,

day = "24",

doi = "10.1103/PhysRevC.84.025801",

language = "English",

volume = "84",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates

AU - Matic, A.

AU - Van Den Berg, A. M.

AU - Harakeh, M. N.

AU - Wörtche, H. J.

AU - Beard, M.

AU - Berg, G. P.A.

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 - Greene, J. P.

AU - Crowter, R.

AU - Schatz, H.

PY - 2011/8/24

Y1 - 2011/8/24

N2 - The rise time of stellar x-ray bursts is a signature of thermonuclear runaway processes in the atmosphere of neutron stars and is highly sensitive to a series of (α,p) reactions via high-lying resonances in sd-shell nuclei. Lacking data for the relevant resonance levels, the stellar reaction rates have been calculated using statistical, Hauser-Feshbach models, assuming a high-level density. This assumption may not be correct in view of the selectivity of the (α,p) reaction to natural parity states. We measured the 28Si(p,t)26Si reaction with a high-resolution spectrometer to identify resonance levels in 26Si above the α-emission threshold at 9.164 MeV excitation energy. These resonance levels are used to calculate the stellar reaction rate of the 22Mg(α,p)25Al reaction and to test the validity of the statistical assumption.

AB - The rise time of stellar x-ray bursts is a signature of thermonuclear runaway processes in the atmosphere of neutron stars and is highly sensitive to a series of (α,p) reactions via high-lying resonances in sd-shell nuclei. Lacking data for the relevant resonance levels, the stellar reaction rates have been calculated using statistical, Hauser-Feshbach models, assuming a high-level density. This assumption may not be correct in view of the selectivity of the (α,p) reaction to natural parity states. We measured the 28Si(p,t)26Si reaction with a high-resolution spectrometer to identify resonance levels in 26Si above the α-emission threshold at 9.164 MeV excitation energy. These resonance levels are used to calculate the stellar reaction rate of the 22Mg(α,p)25Al reaction and to test the validity of the statistical assumption.

UR - http://www.scopus.com/inward/record.url?scp=80052210877&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052210877&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.84.025801

DO - 10.1103/PhysRevC.84.025801

M3 - Article

AN - SCOPUS:80052210877

VL - 84

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 2

M1 - 025801

ER -

High-precision 28Si(p,t)26Si reaction to determine 22Mg(α,p)25Al reaction rates

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this