Stochastic methods for the neutron transport equation. II: Almost sure growth
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Publication:2240476
DOI10.1214/20-AAP1574zbMATH Open1479.82115arXiv1901.00220OpenAlexW3012166588MaRDI QIDQ2240476
Author name not available (Why is that?)
Publication date: 4 November 2021
Published in: (Search for Journal in Brave)
Abstract: The neutron transport equation (NTE) describes the flux of neutrons across a planar cross-section in an inhomogeneous fissile medium when the process of nuclear fission is active. Classical work on the NTE emerges from the applied mathematics literature in the 1950s through the work of R. Dautray and collaborators, [7, 8, 19]. The NTE also has a probabilistic representation through the semigroup of the underlying physical process when envisaged as a stochastic process; cf. [7, 17, 18, 20]. More recently, [6] and [16] have continued the probabilistic analysis of the NTE, introducing more recent ideas from the theory of spatial branching processes and quasi-stationary distributions. In this paper, we continue in the same vein and look at a fundamental description of stochastic growth in the supercritical regime. Our main result provides a significant improvement on the last known contribution to growth properties of the physical process in [20], bringing neutron transport theory in line with modern branching process theory such as [14, 12].
Full work available at URL: https://arxiv.org/abs/1901.00220
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