The γ decay of 143Ce has been investigated using both a Ge(Li) γ ray and a high resolution iron free double focusing β-ray spectrometer. In addition to γ rays previously reported, more γ rays could be observed. Internal conversion coefficients and multipolarities of γ transitions were determined. Ten excited nuclear energy states have been established in 143Pr at 57, 341, 491, 722, 939, 1045, 1061, 1161, 1382 and 1452 keV. Possible spin values have been assigned to all these states on the basis of conversion coefficients of γ rays. The level structure of 143Pr is discussed in terms of existing nuclear models.
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