Speaker
Description
We proposed a novel method of using nuclear resonance fluorescence (NRF) as a probe for spectrum measurements. By utilizing the continuous tunability of an ICS source, NRF photons can be excited at different points across the spectrum. The shape of the energy spectrum can then be effectively scanned and reconstructed by recording the relative NRF yields at different energy points. The feasibility of the proposed method was validated by Geant4 simulations of measuring NRF photon emission from 56Fe irradiated by an ICS source. The simulation results showed high precision for quasi-monochromatic gamma ray spectrum measurements, with a normalized root mean square error (NRMSE) of less than 5%. To maintain a sufficient signal-to-noise ratio (SNR) during the measurement, the energy resolution of detectors is suggested to be less than 1% of the energy being measured. Given an energy tuning precision of Delta E, the minimum measurable width of the energy spectrum, in terms of standard deviation, can reach 0.85 Delta E.
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