Light Element Synthesis in High Entropy Relativistic Flows Associated with Gamma Ray Bursts

Abstract

We calculate and discuss the light element freeze-out nucleosynthesis in high entropy winds and fireballs for broad ranges of entropy-per-baryon, dynamic timescales characterizing relativistic expansion, and neutron-to-proton ratios. With conditions characteristic of Gamma Ray Bursts (GRBs) we find that deuterium production can be prodigious, with final abundance values 2H/H approximately 2%, depending on the fireball isospin, late time dynamics, and the effects of neutron decoupling- induced high energy non-thermal nuclear reactions. This implies that there potentially could be detectable local enhancements in the deuterium abundance associated with GRB events.

14 pages 3 figures

References in corpus (2)

• The Physics of Protoneutron Star Winds: Implications for r-Process Nucleosynthesis
• Magnetohydrodynamics of Gamma-Ray Burst Outflows

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