Abstract
The S30(α,p)Cl33 reaction has been identified in several type-1 x-ray burst (XRB) sensitivity studies as a significant reaction within the αp process, possibly influencing not only the abundances of burst ashes but also the bolometric shape of double-peaked light curves coming from certain XRB systems. Given the dearth of experimental data on the S30(α,p) Cl33 reaction at burst temperatures, we have performed high energy-resolution forward-angle Ar36(p,t)Ar34 measurements in order to identify levels in Ar34 that could appear as resonances in the S30(α,p)Cl33 reaction. Energies of levels identified in this work, along with model-based assumptions for spin assignments and spectroscopic factors, were then used to determine a rate for the S30(α,p)Cl33 reaction based on a narrow-resonance formalism. The rates determined in this work are then compared with two standard Hauser-Feshbach model predictions over a range of XRB temperatures.
| Original language | English |
|---|---|
| Article number | 054613 |
| Journal | Physical Review C |
| Volume | 97 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 22 2018 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Cite this
α -unbound levels in Ar 34 from Ar 36 (p,t) Ar 34 reaction measurements and implications for the astrophysical S 30 (α,p) Cl 33 reaction rate. / Long, A. M.; Adachi, T.; Beard, M.; Berg, G. P.A.; Couder, M.; Deboer, R. J.; Dozono, M.; Görres, J.; Fujita, H.; Fujita, Y.; Hatanaka, K.; Ishikawa, D.; Kubo, T.; Matsubara, H.; Namiki, Y.; O'Brien, S.; Ohkuma, Y.; Okamura, H.; Ong, H. J.; Patel, D.; Sakemi, Y.; Shimbara, Y.; Suzuki, S.; Talwar, R.; Tamii, A.; Volya, A.; Wakasa, Tomotsugu; Watanabe, R.; Wiescher, M.; Yamada, R.; Zenihiro, J.
In: Physical Review C, Vol. 97, No. 5, 054613, 22.05.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - α -unbound levels in Ar 34 from Ar 36 (p,t) Ar 34 reaction measurements and implications for the astrophysical S 30 (α,p) Cl 33 reaction rate
AU - Long, A. M.
AU - Adachi, T.
AU - Beard, M.
AU - Berg, G. P.A.
AU - Couder, M.
AU - Deboer, R. J.
AU - Dozono, M.
AU - Görres, J.
AU - Fujita, H.
AU - Fujita, Y.
AU - Hatanaka, K.
AU - Ishikawa, D.
AU - Kubo, T.
AU - Matsubara, H.
AU - Namiki, Y.
AU - O'Brien, S.
AU - Ohkuma, Y.
AU - Okamura, H.
AU - Ong, H. J.
AU - Patel, D.
AU - Sakemi, Y.
AU - Shimbara, Y.
AU - Suzuki, S.
AU - Talwar, R.
AU - Tamii, A.
AU - Volya, A.
AU - Wakasa, Tomotsugu
AU - Watanabe, R.
AU - Wiescher, M.
AU - Yamada, R.
AU - Zenihiro, J.
PY - 2018/5/22
Y1 - 2018/5/22
N2 - The S30(α,p)Cl33 reaction has been identified in several type-1 x-ray burst (XRB) sensitivity studies as a significant reaction within the αp process, possibly influencing not only the abundances of burst ashes but also the bolometric shape of double-peaked light curves coming from certain XRB systems. Given the dearth of experimental data on the S30(α,p) Cl33 reaction at burst temperatures, we have performed high energy-resolution forward-angle Ar36(p,t)Ar34 measurements in order to identify levels in Ar34 that could appear as resonances in the S30(α,p)Cl33 reaction. Energies of levels identified in this work, along with model-based assumptions for spin assignments and spectroscopic factors, were then used to determine a rate for the S30(α,p)Cl33 reaction based on a narrow-resonance formalism. The rates determined in this work are then compared with two standard Hauser-Feshbach model predictions over a range of XRB temperatures.
AB - The S30(α,p)Cl33 reaction has been identified in several type-1 x-ray burst (XRB) sensitivity studies as a significant reaction within the αp process, possibly influencing not only the abundances of burst ashes but also the bolometric shape of double-peaked light curves coming from certain XRB systems. Given the dearth of experimental data on the S30(α,p) Cl33 reaction at burst temperatures, we have performed high energy-resolution forward-angle Ar36(p,t)Ar34 measurements in order to identify levels in Ar34 that could appear as resonances in the S30(α,p)Cl33 reaction. Energies of levels identified in this work, along with model-based assumptions for spin assignments and spectroscopic factors, were then used to determine a rate for the S30(α,p)Cl33 reaction based on a narrow-resonance formalism. The rates determined in this work are then compared with two standard Hauser-Feshbach model predictions over a range of XRB temperatures.
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U2 - 10.1103/PhysRevC.97.054613
DO - 10.1103/PhysRevC.97.054613
M3 - Article
VL - 97
JO - Physical Review C
JF - Physical Review C
SN - 2469-9985
IS - 5
M1 - 054613
ER -