LXXXVIII. The determination of the charge of heavy particles emitted during the explosive disintegration of nuclei

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Abstract
The charge of heavy nuclear fragments, ejected during the explosive disintegration of nuclei, can be precisely determined if the length of the track in a photographic emulsion is of the order of 1500µ or greater. The method is based on the determination of the number of δ-rays per unit length which contain more than a certain number of grains. The maximum observed energies of ejection of light nuclei, lithium, beryllium and boron are of the order of 500 MeV. The nuclear processes which lead to the emission of heavy fragments with such great energy remain to be explained.

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