ROLE OF QUENCHING ON ALPHA BETA SEPARATION IN LIQUID SCINTILLATION-COUNTING FOR SEVERAL HIGH-CAPACITY COCKTAILS/

Citation
L. Pujol et Ja. Sanchezcabeza, ROLE OF QUENCHING ON ALPHA BETA SEPARATION IN LIQUID SCINTILLATION-COUNTING FOR SEVERAL HIGH-CAPACITY COCKTAILS/, Analyst, 122(4), 1997, pp. 383-385
Citations number
18
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
00032654
Volume
122
Issue
4
Year of publication
1997
Pages
383 - 385
Database
ISI
SICI code
0003-2654(1997)122:4<383:ROQOAB>2.0.ZU;2-V
Abstract
The optimization of alpha/beta separation in liquid scintillation usin g pulse shape analysis is convenient for the simultaneous determinatio n of alpha and beta emitters in natural water and other samples, In th is work, alpha/beta separation was studied for different scintillant/v ial combinations and it was observed that both the optimum pulse shape discrimination level and the total interference value (that is, the s ummed relative interference between alpha and beta spectra) were depen dent on the sample quenching and independent of the scintillant/vial c ombination. These results provide a simple method for modifying the co unting configuration, such as a change in the cocktail, vial or sample characteristics, without the need to perform exhaustive parameter opt imizations, Also, it was observed that, for our counting conditions, t he combination of Ultima Gold AB scintillation cocktail with Zinsser l ow diffusion vials presented the lowest total interference, namely 0.9 4 +/- 0.28%, which is insignificant for the counting of environmental samples.