Nuclear excitation by two-photon electron transition

Autor: Volotka, A. V., Surzhykov, A., Trotsenko, S., Plunien, G., Stöhlker, Th., Fritzsche, S.
Rok vydání: 2016
Předmět:
Zdroj: Phys. Rev. Lett. 117, 243001 (2016); Editors' Suggestion
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.117.243001
Popis: A new mechanism of nuclear excitation via two-photon electron transitions (NETP) is proposed and studied theoretically. As a generic example, detailed calculations are performed for the $E1E1$ $1s2s\,^1S_0 \rightarrow 1s^2\,^1S_0$ two-photon decay of He-like $^{225}$Ac$^{87+}$ ion with the resonant excitation of the $3/2+$ nuclear state with the energy 40.09(5) keV. The probability for such a two-photon decay via the nuclear excitation is found to be $P_{\rm NETP} = 3.5 \times 10^{-9}$ and, thus, is comparable with other mechanisms, such as nuclear excitation by electron transition and by electron capture. The possibility for the experimental observation of the proposed mechanism is thoroughly discussed.
Comment: 5 pages, 4 figures
Databáze: arXiv