| Abstract
| - Abstract. In an effort to resolve the existing discrepancy between experiment and theory, the cross-sections for the production ofLl,Lα,Lβ andLγ groups ofL-shell X-rays of Ho by photons of nine energies in the range 10-40 keV have been measured using an improved version of annular source double reflection geometrical set-up. Contrary to the earlier findings of Garget al that the measured values of the cross-sections are consistently higher than those calculated theoretically, the present results do not confirm this. The plausible deficiencies in the experiments of Garget al are pointed out and possible remedies to overcome them are suggested. It is concluded that the higher values obtained by Garget al are probably due to systematic errors in their method of measurement.
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