3 Introduction My work consists: In analysing gamma spectrums from experiment with DEIMOS32…Experiment = measurement of radioactive sample (activated by activation method in a cyclotron) with different configurations…To get experimental cross-sectionsDifferent configurations = We measured the sample on one side then of the other one several times to make a statistical analysis and obtain a better precision of the results
4 Spectrum analysis with DEIMOS32 Gamma lines peak analysis with the software DEIMOS 32
5 Spectrum analysis with DEIMOS32 We’re able to plan possible reactions and isotopes produced
6 Spectrum analysis with DEIMOS32 Comparison between the result tables from DEIMOS 32 analysis and the internet data base (decay data search) on gamma lines to identify the isotopes
7 Spectrum analysis with DEIMOS32 4 isotopes found from (n,2n) to (n,4n) reactions and 1 isotope (198Au) found from (n,gamma) reaction.
8 Cross-sections calculation Nyield calculation:Peak areaSelf-absorption correctionBeam correctionDead time correctionDecay during cooling and measurementγline intensityDetector efficiencyCorrection for coincidencesSquare-emitter correctionWeight normalizationDecay during irradiation
18 Results Comments: Fluctuations are purely systematical Nyield-average isn’t depending on the configurationBut the difference of Nyield-average (calculated for each gamma line and isotope) is bigger than the uncertainty of weighted average. It comes from the systematic uncertainty of efficiency determination.