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   71172
   For distant clusters, Fe-K lines including the K-beta lines are shifted
   below 7keV and observed with better efficiency than those of nearby
   clusters. For A1413, from detailed line analysis, it was found that the
   ratio of K alpha to K beta seemed to be smaller than the model
   prediction based on a collisional ionization equilibrium(CIE)
   assumption. This anomaly seems to be seen in the outer region of
   cluster, though it is marginal because of statistical error. The
   breakdown of the CIE should lead to the change of the concentricity of
   the dark matter derived with the CIE. We propose the re-observation of
   A1413 and make sense of anomaly with good statistics. This lead the
   test of the collisional ionization equilibrium assumption of ICM.
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