α -unbound levels in Ar34 from Ar36(p,t)Ar34 reaction measurements and implications for the astrophysical S30(α,p)Cl33 reaction rate

Long, Alexander Makenzie; 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, T.; Watanabe, R.; Wiescher, M.; Yamada, R.; Zenihiro, J.

doi:10.1103/PhysRevC.97.054613

Title: $α$ -unbound levels in ${}^{34}{Ar}$ from ${}^{36}{Ar} (p, t) {}^{34}{Ar}$ reaction measurements and implications for the astrophysical ${}^{30}S (α, p) {}^{33}{Cl}$ reaction rate

Journal Article · Tue May 22 00:00:00 EDT 2018 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.97.054613· OSTI ID:1524392

^[1]; Adachi, T. ^[2]; Beard, M. ^[3]; Berg, G. P. A. ^[3]; Couder, M. ^[3]; deBoer, R. J. ^[3]; Dozono, M. ^[4]; Görres, J. ^[3]; Fujita, H. ^[5]; Fujita, Y. ^[5]; Hatanaka, K. ^[5]; Ishikawa, D. ^[5]; Kubo, T. ^[6]; Matsubara, H. ^[5]; Namiki, Y. ^[6]; O'Brien, S. ^[3]; Ohkuma, Y. ^[6]; Okamura, H. ^[5]; Ong, H. J. ^[5]; Patel, D. ^[3] more »

Univ. of Notre Dame, IN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Tohoku Univ., Sendai (Japan)
Univ. of Notre Dame, IN (United States)
Kyushu Univ. (Japan)
Osaka Univ. (Japan)
Niigata Univ. (Japan)
Univ. of Notre Dame, IN (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
Florida State Univ., Tallahassee, FL (United States)

The ${}^{30}S (α, p) {}^{33}{Cl}$ reaction has been identified in several type-1 x-ray burst (XRB) sensitivity studies as a significant reaction within the α , p process, potentially 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 ${}^{30}S (α, p) {}^{33}{Cl}$ reaction at burst temperatures, we have performed high energy-resolution forward-angle ${}^{36}{Ar} (p, t) {}^{34}{Ar}$ measurements in order to identify levels in ³⁴Ar that could appear as resonances in the ${}^{30}S (α, p) {}^{33}{Cl}$ reaction Energies of levels identified in this research, along with model-based assumptions for spin assignments and spectroscopic factors, were then used to determine a rate for the ${}^{30}S (α, p) {}^{33}{Cl}$ 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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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: 89233218CNA000001; PHY-1068192; SC0009883

OSTI ID:: 1524392

Alternate ID(s):: OSTI ID: 1438271

Report Number(s):: LA-UR-17-31506; PRVCAN

Journal Information:: Physical Review C, Vol. 97, Issue 5; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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