Determination of astrophysical direct capture reaction rate for $^{26}\mathrm{Si}(p,\gamma)^{27}\mathrm{P}$ by extracting the asymptotic normalization coefficients in the mirror nuclear system
| Pub type: | Phdthesis |
| Citation: | dag:PhD2016 |
| Status: | Published |
| Type: | Ph. D. |
| Journal: | Ph.D. Thesis, Texas A&M University |
| Year: | 2016 |
| Month: | December |
| School: | Department of Physics & Astronomy, Texas A&M University |
| Address: | College Station, TX, USA |
| URL: | http://oaktrust.library.tamu.e... |
| Abstract: | The ^26Si(p,γ)^27P reaction is of primary interest to this study in connection with its role in the destruction of the important astrophysical observable ^26Al. Due to very limited experimental information, more experimental data are clearly needed in the calculation of the ^26Si(p,γ)^27P reaction rate at the temperature of astrophysical interest. However, the reaction rate information for ^26Si(p,γ)^27P cannot be obtained today with direct measurements. Hence, it was decided to study the ^26Si(p,γ)^27P reaction using the indirect asymptotic normalization coefficient (ANC) technique. In this method, ^26Si(p,γ)^27P can be studied by means of its mirror nuclear systems ^26Mg+n→^27Mg, and the reaction rate for the radioactive proton capture ^26Si(p,γ)^27P at stellar energies can be determined through measurements of the ANC in the mirror nuclear system ^26Mg+n→^27Mg. For this reason, ^13C(^26Mg,^26Mg)^13C and the single neutron transfer channel ^13C(^26Mg,^27Mg)^12C measurements were performed. The extracted neutron asymptotic normalization coefficient for ^27Mg was used to determine the reaction rate for ^26Si(p,γ)^27P. As a part of this dissertation, the elastic scattering of ^28Si and ^32S on ^13C experiments were also performed using the newly upgraded Oxford detector. The extracted optical parameters along with an overview of the upgrade process of the Oxford detector are presented. |
| Month_val: | 12 |
| Sig contrib: | R. E. Tribble |
| Authors: | |
| Added by: | [DGM] |
| Total mark: | 0 |
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