Abstract
A way of simplifying the microscope measurements and the resulting calculations, in the photographic emulsion method of studying neutron spectra, is described. The energy distribution of neutrons from the reaction 10B(d, n)11C has been measured, to show that the saving in time is accompanied by no appreciable loss of accuracy. The method has been used in a study of the angular distribution of neutrons from the reaction 11B(d, n)2C at 8·1 mev. The results are consistent with the theory of the stripping process and confirm that the 4·47 mev level in 12C, like the ground state, has even parity.

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