Abstract
Gamma rays following thermal-neutron capture in natural and in 39K enriched potassium have been investigated with a Ge(Li) and a Ge(Li)-NaI spectrometer. In the 39K(n,γ)40K reaction 222 γ-rays were found, of which 187 could be fitted into the level scheme of 40K. Fifteen γ-rays could be ascribed to the 41K(n,
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