43 research outputs found
A Determination of the 27Si(P,y) Reaction Rate Using its Mirror and its Importance in X-Ray Burst Nucleosynthesis
X-ray bursts are the most frequent thermonuclear explosions occurring in the universe
and represent one of the sources of heavier element nucleosynthesis. In order to determine
how much X-ray bursts influence the abundances of these heavier nuclei there is a need
for critical nuclear information such as: nuclear masses, ß-decay rates and reaction rates.
Due to this need, the field of experimental nuclear physics has been focusing on developing
unstable beams and new or improved indirect methods of studying nuclei and
reactions, as well as detection systems of higher capability.
In light of this perspective, the focus of this dissertation was twofold. One part involved
performing a low-cost, low-modification upgrade to the Oxford focal plane detector using
Micromegas technology. The upgrade was very successful in improving the total energy
loss resolution by as high as a factor of 3 and thus improving the particle identification
ability of the detector. This leads to an increase in the mass range of nuclei possible to
study from A=16 to A=32.
The other part of this dissertation project was aimed at studying the proton-capture
reaction ^27Si(p, γ)^28P using an experimental indirect method called the Asymptotic Normalization
Coefficient method. This reaction is part of the thermonuclear runaway network
of an X-ray burst suggested by the theoretical models. The spectroscopic factor of ^28P was
evaluated for the first time in literature at Sv2s½= 1:11±0:56. The direct capture reaction
rate was found to be in agreement with the theoretical predictions, and it was confirmed
experimentally that at astrophysical energies, the non-resonant component is overwhelmed
by the contributions of the resonances
Numerical modelling of aerodynamics for applications in sports car engineering
Body crematedhttps://stars.library.ucf.edu/cfm-ch-memoranda-1930/1846/thumbnail.jp
A Determination of the 27Si(P,y) Reaction Rate Using its Mirror and its Importance in X-Ray Burst Nucleosynthesis
X-ray bursts are the most frequent thermonuclear explosions occurring in the universe
and represent one of the sources of heavier element nucleosynthesis. In order to determine
how much X-ray bursts influence the abundances of these heavier nuclei there is a need
for critical nuclear information such as: nuclear masses, ß-decay rates and reaction rates.
Due to this need, the field of experimental nuclear physics has been focusing on developing
unstable beams and new or improved indirect methods of studying nuclei and
reactions, as well as detection systems of higher capability.
In light of this perspective, the focus of this dissertation was twofold. One part involved
performing a low-cost, low-modification upgrade to the Oxford focal plane detector using
Micromegas technology. The upgrade was very successful in improving the total energy
loss resolution by as high as a factor of 3 and thus improving the particle identification
ability of the detector. This leads to an increase in the mass range of nuclei possible to
study from A=16 to A=32.
The other part of this dissertation project was aimed at studying the proton-capture
reaction ^27Si(p, γ)^28P using an experimental indirect method called the Asymptotic Normalization
Coefficient method. This reaction is part of the thermonuclear runaway network
of an X-ray burst suggested by the theoretical models. The spectroscopic factor of ^28P was
evaluated for the first time in literature at Sv2s½= 1:11±0:56. The direct capture reaction
rate was found to be in agreement with the theoretical predictions, and it was confirmed
experimentally that at astrophysical energies, the non-resonant component is overwhelmed
by the contributions of the resonances