Simultaneous determination of 226Ra, 233U and 237Np by liquid scintillation spectrometry

Deconvolution of liquid scintillation alpha spectra of mixtures of uranium and radium isotopes

“…Using these values and a combination of the Eqs. [26]. As the quenching increases (tSIE decreases from 462 to 218), FWHM of the 238 U peak varies from 10.5 to 12.9%, while for 214 Po varies from 12.2 to 13.5%.…”

“…., n. The Gaussian terms contain the variables A i , w i , CN and CN c , which are the area of the Gaussian peak, the FWHM, the channel number and the channel corresponding to the peak's centroid for the i radionuclide present in the alpha spectrum, respectively. This method of multi-Gaussian alpha peak analysis was also proposed by C. Nebelung and L. Baraniak, by Sanchez et al and by Tome et al who used slightly different Gaussian functions [26][27][28] respectively. To reduce the computing time needed for the fitting procedure, constraints in some of the variables present in the Eq.…”

CdZnTe- and TlBr-detectors response simulation for registration of the mixed beta- and gamma-radiation

“…Одíàêî íà ïðàêòèêå â бîëьшèí-ñòâå ñëóчàåâ èíòåíñèâíîñòь èзмåðåííîãî ñèãíàëà îò ðàдèîàêòèâíîãî èñòîчíèêà ëèбî ïðàêòèчåñêè ðàâíà èíòåíñèâíîñòè ðàдèàцèîííîãî фîíà, ëèбî ñèãíàë ïîдàâëÿåòñÿ мàñêèðóющèм èзëóчåíèåм (êàê бåòà, òàê è ãàммà), чòî ïðèâîдèò ê íåîбõî- дèмîñòè èзóчåíèÿ ñмåшàííыõ èñòîчíèêîâ ðàдè-îàêòèâíîãî èзëóчåíèÿ. В ñëóчàÿõ ðåãèñòðàцèè бåòà-èзëóчåíèÿ ïðèмåíÿюòñÿ õèмèчåñêèå мåòî-ды ðàздåëåíèÿ íóêëèдîâ èëè мåòîды, îñíîâàí-íыå íà èзмåðåíèè è àíàëèзå ñïåêòðîâ [1]. Бîëåå ýффåêòèâíымè ÿâëÿюòñÿ мåòîды дåêîíâîëюцèè èзмåðåííîãî ñïåêòðà, ïîñêîëьêó õèмèчåñêèå мå-òîды ðàздåëåíèÿ íå âñåãдà ïîзâîëÿюò âыдåëèòь чèñòыé èзîòîï [2].…”