Nuclear excitation by two-photon electron transition

Abstract

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 $E1E1$ $1s2s{}^1{S}_0\to 1s^2{}^1{S}_0$ 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 $P_{\mathrm{NETP}}=3.5\times 10^{-9}$ 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.

arXiv comment5 pages, 4 figures

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Cited by in corpus (3)

• Excitation of the ${}^{229}$Th nucleus via a two-photon electronic transition
• Theoretical analysis of the electron bridge process in ${}^{229}$Th${}^{3+}$
• Photoelectron distribution of non-resonant two-photon ionization of neutral atoms