Q-Value Measurements at the University of Pittsburgh
The 15 MeV deuteron beam from the University of Pittsburgh cyclotron is being used to determine neutron binding energies by measuring Q-values for (d, p) and (d, t) reactions. Thin—and in many cases, isotopically enriched—targets are irradiated by the magnetically focussed and analysed beam; reaction products are magnetically analysed and detected by photographie plates. The absolute energy calibration is achieved by running a spectrum from 57Fe (d, p) or (d, t) adjacent to each run on an unknown without making any changes other than shifting the plate and target holders. The nearest well known particle groups from the 57Fe reactions were used as standards. The energy resolution was typically 60 keV.
KeywordsTarget Thickness Mass Correction Particle Group Target Holder Average Standard Error
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