Trajectory dependent resonant coherent excitation of planar-channeled ions in a thin Si crystal

Kondo, Chika; Masugi, S.; Muranaka, T.; Ishikawa, Akio; Nakano, Yuji; Azuma, T.; Hatakeyama, A.; Komaki, K.; Nakai, Yutaka; Yamazaki, Y.; Takada, E.; Murakami, Takeshi

doi:10.1016/j.nimb.2006.11.115

Cited by 10 publications

(3 citation statements)

References 13 publications

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“…It is known that the RCE of the − s p 1 2 transition in H-like ions is often observed as a broad resonance under planar channeling conditions, which is explained by the static Stark effect induced by the continuum potential formed by the channeling plane [11,12]. The energy shifts of the n = 2 states have been clearly observed in trajectory-resolved channeling experiments [13,14]. In such conditions, a significant yield of metastable production due to the mixing of 2s and 2p states was also predicted by the density matrix approach [15].…”

Section: Introductionmentioning

confidence: 97%

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: Introductionmentioning

confidence: 97%

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

Nakano

Sokolik

Stysin

et al. 2015

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

View full text Add to dashboard Cite

show abstract

“…The present work is stimulated by recent RCE experiments of the Tokyo RCE collaboration including their unambiguous observation of the azimuthal anisotropy of the characteristic X-ray radiation from planar-channeled ions [5], double RCE experiments [6], and trajectory dependent measurements of the charge state fraction distribution of the ion beam [7].…”

Section: Introductionmentioning

confidence: 99%

“…2 we suggest to use experimental technique of [7] to study not only the charge state distribution but also the characteristic X-rays from RCE planar channeled ions resolved over the transverse entrance coordinate z in of the incoming ion. Our treatment shows the close connection of the angular distribution of the X-rays with the to geometrical properties of the in-crystal electric field.…”

Section: Introductionmentioning

confidence: 99%