Dresden 2011 – scientific programme
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A: Fachverband Atomphysik
A 22: Electron scattering and recombination I
A 22.7: Talk
Thursday, March 17, 2011, 15:45–16:00, BAR 106
Multiple resonances in nuclei coupling to the atomic shells — Srinivas K. Arigapudi1,2 and •Adriana Pálffy2 — 1Indian Institute of Technology Delhi, New Delhi, India — 2Max-Planck-Institut für Kernphysik, Heidelberg, Germany
Processes at the borderline between atomic and nuclear physics open the possibility to explore properties of exotic nuclei via experiments involving highly charged ions [1]. Among these, nuclear excitation by electron capture (NEEC) [2] or nuclear excitation by electron transition (NEET) [3] are coupling nuclei to the atomic shells. In the doubly resonant process of NEET, the decay of a bound electron into a lower atomic shell leads to the excitation of the nucleus [3]. This process requires on the one hand the overlap of an atomic and nuclear resonance and on the other hand the presence of an appropriate atomic hole. Due to its resonant character, NEET can be more efficient than NEEC as nuclear excitation mechanism.
Here we investigate a scenario in which the dielectronic recombination of a free electron into a highly charged ion creates the initial hole necessary for NEET. This multiply resonant process is quite efficient not last due to the interferences that may occur involving electron recombination mechanisms and radiative electronic and nuclear transitions. The consequences of this process on nuclear state population in dense plasma environments are discussed.
[1] A. Pálffy, Contemporary Phys. 51, 471 (2010)
[2] A. Pálffy, W. Scheid, Z. Harman, Phys. Rev. A 73, 012715 (2006)
[3] S. Kishimoto et al., Phys. Rev. Lett. 85, 1831 (2000)