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

48 ( 14 )  , pp.144026-1 - 144026-7 , 2015-05 , IOP Publishing Ltd
ISSN:0953-4075
Description
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-$\mu$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.

Number of accesses :

 Other information