Abstract
A method has been developed for recording coincidences between neutrons and gamma-rays produced in (d,nγ) reactions. Neutron energies were measured by time-of-flight techniques and a large NaI(Tl) crystal was used to determine gamma-ray energies and intensities. The neutron detector was placed in the forward direction to emphasize the excitation of Ip = 0 levels in the residual nuclei. The method was applied to the 27Al(d,nγ)28Si and 31P(d,nγ)32S reactions at the deuteron energy 4.0 MeV. The gamma-ray decay of a number of levels below 12 MeV in 28Si and below 9 MeV in 32S was studied. The isobaric analogue levels are prominently populated by the (d,n) reaction. The method is in particular suitable for studies of the decay of these levels.
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