α -unbound levels in Ar34 from Ar36(p,t)Ar34 reaction measurements and implications for the astrophysical S30(α,p)Cl33 reaction rate
Year: 2018
Type: article
Abstract: The $^{30}\mathrm{S}(\ensuremath{\alpha},p)^{33}\mathrm{Cl}$ reaction has been identified in several type-1 x-ray burst (XRB) sensitivity studies as a significant reaction within the $\ensuremath{\alpha}p$ 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 $^{30}\mathrm{S}(\ensuremath{\alpha},p)$ $^{33}\mathrm{Cl}$ reaction at burst temperatures, we have performed high energy-resolution forward-angle $^{36}\mathrm{Ar}(p,t)^{34}\mathrm{Ar}$ measurements in order to identify levels in $^{34}\mathrm{Ar}$ that could appear as resonances in the $^{30}\mathrm{S}(\ensuremath{\alpha},p)^{33}\mathrm{Cl}$ 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 $^{30}\mathrm{S}(\ensuremath{\alpha},p)^{33}\mathrm{Cl}$ 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.
Source: Physical Review C
Authors: A. M. Long, T. Adachi, M. Beard, G. P. A. Berg, M. Couder, R. J. deBoer, M. Dozono, J. Görres, H. Fujita, Y. Fujita, K. Hatanaka, D. Ishikawa, T. Kubo, H. Matsubara, Y. Namiki, S. O'Brien, Y. Ohkuma, H. Okamura, H. J. Ong, D. Patel, Y. Sakemi, Y. Shimbara, S. Suzuki, R. Talwar, A. Tamii, A. Volya, T. Wakasa, R. Watanabe, M. Wiescher, R. Yamada, J. Zenihiro
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Nuclear Structure and Nuclear Astrophysics, Weak Transition in Nuclei Studied by Means of Strong Transition, A FINITE OPEN QUANTUM MANY-BODY SYSTEM, Study of ultracold molecules toward the search of electron electric dipole moment, G5478458683, Search for the electric dipole moment with laser cooled radioactive atoms in the optical lattice
OpenAlex ID: W2803557097