Concept for an off-line gain stabilisation method.
Conceptual ideas are presented for an off-line gain stabilisation method for spectrometry, in particular for alpha-particle spectrometry at low count rate. The method involves list mode storage of individual energy and time stamp data pairs. The 'Stieltjes integral' of measured spectra with respect to a reference spectrum is proposed as an indicator for gain instability. 'Exponentially moving averages' of the latter show the gain shift as a function of time. With this information, the data are relocated stochastically on a point-by-point basis.
Pommé
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EC-JRC-IRMM, Institute for Reference Materials and Measurements, Retieseweg, B-2440 Geel, Belgium. stefaan.pomme@cec.eu.int
Sibbens
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D000465:Algorithms; D000512:Alpha Particles; D016247:Information Storage and Retrieval / Q000379:methods*; D015233:Models, Statistical; D011786:Quality Control; D011829:Radiation Dosage; D011868:Radioisotopes / Q000032:analysis*; D011874:Radiometry / Q000379:methods*; D013057:Spectrum Analysis / Q000379:methods*
D011868:Radioisotopes