Nuclear excitation by electron transition rate confidence interval in a Hg201 local thermodynamic equilibrium plasma

M. Comet, G. Gosselin, V. Méot, P. Morel, J.-C. Pain, D. Denis-Petit, F. Gobet, F. Hannachi, M. Tarisien, and M. Versteegen
Phys. Rev. C 92, 054609 – Published 11 November 2015

Abstract

Nuclear excitation by electron transition (NEET) is predicted to be the dominant excitation process of the first Hg201 isomeric state in a laser heated plasma. This process may occur when the energy difference between a nuclear transition and an atomic transition is close to zero, provided the quantum selection rules are fulfilled. At local thermodynamic equilibrium, an average atom model may be used, in a first approach, to evaluate the NEET rate in plasma. The statistical nature of the electronic transition spectrum is then described by the means of a Gaussian distribution around the average atom configuration. However, using a continuous function to describe the electronic spectrum is questionable in the framework of a resonant process, such as NEET. In order to get an idea of when it can be relied upon to predict a NEET rate in plasma, we present in this paper a NEET rate calculation using a model derived from detailed configuration accounting. This calculation allows us to define a confidence interval of the NEET rate around its average atom mean value, which is the first step to design a future experiment.

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  • Received 22 July 2015

DOI:https://doi.org/10.1103/PhysRevC.92.054609

©2015 American Physical Society

Authors & Affiliations

M. Comet*, G. Gosselin, V. Méot, P. Morel, and J.-C. Pain

  • CEA, DAM, DIF F-91297 Arpajon, France

D. Denis-Petit, F. Gobet, F. Hannachi, M. Tarisien, and M. Versteegen

  • Université de Bordeaux, CNRS-IN2P3, CENBG, F-33175 Gradignan, France

  • *Corresponding author: maxime.comet@cea.fr

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Vol. 92, Iss. 5 — November 2015

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