Resonant coherent excitation of ions in planar channel of crystal with inclined beam incidence

Sokolik, A. A.

doi:10.1016/j.nimb.2012.03.010

Cited by 1 publication

(2 citation statements)

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“…The absolute 2s population was also in fairly good agreement between the experiment and calculation, although some disagreements can be found in levels 2 and 4. Note that the coherence zone chosen in this analysis is consistent with that in earlier studies [18,19,24], and a change of the coherence zone within a reasonable range does not essentially affect the resonance shape and absolute 2s population at the resonance maximum. The discrepancy of the relative intensity of the levels between the calculation and the experiment might be attributed to the beam divergence and the misalignment of the crystal from the channeling condition, which is not included in the current calculation.…”

Section: Density Matrix Calculationsupporting

confidence: 78%

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Metastable Ar¹⁷⁺(2 s) production by Stark-assisted resonant coherent excitation

Nakano

Sokolik

Stysin

et al. 2015

J. Phys. B: At. Mol. Opt. Phys.

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We report on the selective production of the 2s metastable state of 390-MeV u−1 H-like Ar17+ ions by the resonant coherent excitation (RCE). The RCE to the 2s state was achieved by using Stark mixing of n = 2 states under planar channeling conditions in a 1- m thick Si crystal. The population of the 2s state was quantitatively estimated from the ionization probability in a stripper foil installed 50 mm downstream of the crystal. The 2s population was found to be 0.05 of the total number of Ar17+ ions at the stripper. The result is in good agreement with a theoretical calculation performed with the density matrix approach.

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Section: Density Matrix Calculationsupporting

confidence: 78%

“…The trajectory-resolved calculation also suggested that the 2s population will be further enhanced when we bring more ions closer to the atomic planes. This might be realized by an inclined beam incidence [24], although such an experiment is not within the scope of this study.…”

Section: Density Matrix Calculationmentioning

confidence: 99%