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Experimental investigation of the 30S(α, p) thermonuclear reaction in x-ray bursts.
- Source :
- EPJ Web of Conferences; 2016, Vol. 109, p1-6, 6p
- Publication Year :
- 2016
-
Abstract
- We performed the first measurement of <superscript>30</superscript>S+α resonant elastic scattering to experimentally examine the <superscript>30</superscript>S(α, p) stellar reaction rate in type I x-ray bursts. These bursts are the most frequent thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of accreting neutron star binaries. The <superscript>30</superscript>S(α,p) reaction plays a critical role in burst models, yet very little is known about the compound nucleus <superscript>34</superscript>Ar at these energies nor the reaction rate itself. We performed a measurement of alpha elastic scattering with a radioactive beam of<superscript>30</superscript> S to experimentally probe the entrance channel. Utilizing a gaseous active target system and silicon detector array, we extracted the excitation function from 1.8 to 5.5 MeV near 160° in the center-of-mass frame. The experimental data were analyzed with an R-Matrix calculation, and we discovered several new resonances and extracted their quantum properties (resonance energy, width, spin, and parity). Finally, we calculated the narrow resonant thermonuclear reaction rate of <superscript>30</superscript>S(α, p) for these new resonances. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21016275
- Volume :
- 109
- Database :
- Complementary Index
- Journal :
- EPJ Web of Conferences
- Publication Type :
- Conference
- Accession number :
- 113123509
- Full Text :
- https://doi.org/10.1051/epjconf/201610904005