Infrared and visible laser spectroscopy for highly-charged Ni-like ions

Abstract

Application of visible or infrared (IR) lasers for spectroscopy of highly-charged ions (HCI) has not been particularly extensive so far due to a mismatch in typical energies. We show here that the energy difference between the two lowest levels within the first excited configuration $3d^{9}4s$ in Ni-like ions of heavy elements from $Z_N$=60 to $Z_N$=92 is within the range of visible or near-IR lasers. The wavelengths of these transitions are calculated within the relativistic model potential formalism and compared with other theoretical and limited experimental data. Detailed collisional-radiative simulations of non-Maxwellian and thermal plasmas are performed showing that photopumping between these levels using relatively moderate lasers is sufficient to provide a two-order of magnitude increase of the pumped level population. This accordingly results in a similar rise of the x-ray line intensity thereby allowing control of x-ray emission with visible/IR lasers.

14 pages, 4 figures; to be published in the HCI-2016 proceedings

References in corpus (3)

• Multipole (E1, M1, E2, M2, E3, M3) transition wavelengths and rates between 3l5l' excited and ground states in nickel-like ions
• Observation of the hyperfine transition in lithium-like Bismuth ${}^{209}{\text{Bi}}^{80+}$: Towards a test of QED in strong magnetic fields
• Density dependence of the forbidden lines in Ni-like tungsten

Cited by in corpus (2)

• Detection of the $5p-4f$ orbital crossing and its optical clock transition in Pr${}^{9+}$
• Hyperfine-structure-resolved laser spectroscopy of many-electron highly charged ions