Resonant-Coherent Excitation of Channeled Ions

Three-Dimensional Resonant Coherent Excitation of Nonchanneling Ions in a Crystal

“…This process, called ''resonant coherent excitation'' (RCE), was first pointed out by Okorokov [1] in 1965, and was observed by Datz et al [2] for the first time through the exit charge-state distribution of axialchanneling ions in 1978. Since then many experiments have been performed using low Z14 and low energy ( MeV=u) ions in the axial-or planar-channeling condition, or in the surface-scattering condition [3,4]. As shown in Fig.…”

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

“…The use of static Stark effect is another potential method to produce the 2s state of H-like systems. 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].…”

Velocity-selective sublevel resonance of atoms with an array of current-carrying wires

“…The most extensively studied is a phenomenon called "resonant coherent excitation" [15], where periodic perturbation experienced by an ion traversing inside a crystal induces an internal transition of the ion when the perturbation frequency corresponds to the energy difference of the relevant states. The resonance of this kind has attracted much attention [16,17] since the first proposal by Okorokov [18]. Recent progress achieved by using high energy beams of highly charged ions has shown the possibilities of application to high resolution spectroscopy and coherent control of these ions in the X-ray region of keV or 10 18 Hz [19,20], the order of which is determined by the ion velocity (∼ 10 8 m/s) and the lattice constant (∼ 10 −10 m).…”