...The Activity Predictor calculates activities, exposure rates and gamma spectra of activated samples for NAA experiments. The calculation procedure
for predictions involve both analytical and Monte Carlo methods. The Activity Predictor software is validated by a series of activation experiments. It has been found that this software calculates the activities and exposure rates precisely. The software also predicts gamma spectrum for each measurement. The predicted spectra agreed partially with measured spectra. This software has a XML database which includes nuclear data for frequently used materials in NAA. ...