Ervin Kafexhiu, Felix Aharonian, Gabriela Vila
The importance of nuclear reactions in low-density astrophysical plasmas with
ion temperatures $T \geq 10^{10}$ K has been recognized for more than thirty
years. However, the lack of comprehensive data banks of relevant nuclear
reactions and the limited computational power have not previously allowed
detailed theoretical studies. Recent developments in these areas make it timely
to conduct comprehensive studies on the nuclear properties of very hot plasmas
formed around compact relativistic objects such as black holes and neutron
stars. Such studies are of great interest in the context of scientific programs
of future low-energy cosmic $\gamma$-ray spectrometry. In this work, using the
publicly available code TALYS, we have built a large nuclear network relevant
for temperatures exceeding $10^{10}$ K. We have studied the evolution of the
chemical composition and accompanying prompt gamma-ray emission of such high
temperature plasmas. We present the results on the abundances of light elements
D, T, $^3$He, $^4$He, $^{6}$Li, $^{7}$Li $^{9}$Be, $^{10}$B, $^{11}$B, and
briefly discuss their implications on the astrophysical abundances of these
elements.
View original:
http://arxiv.org/abs/1201.1729
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