caa a22 4500 378877100 CHVBK 20180305123423.0 cr unu---uuuuu 161128e20030201xx s 000 0 eng 10.1524/ract.91.2.63.19993 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.2.63.19993 Some rules to improve the energy resolution in alpha liquid scintillation with beta rejection [Elektronische Daten] [J. Aupiais, C. Aubert, N. Dacheux] Two common scintillating mixtures dedicated to alpha measurements by means of alpha liquid scintillation with pulse shape discrimination were tested: the di-isopropylnaphthalene — based and the toluene-based solvents containing the commercial cocktails Ultima Gold AB® and Alphaex®. We show the possibility to enhance the resolution up to 200% by using no-water miscible cocktails and by reducing the optical path. Under these conditions, the resolution of about 200keV can be obtained either by the Tri CarbTM or by the PeralsTM spectrometers. The time responses, e.g., the time required for a complete energy transfer between the initial interaction alpha particle-solvent and the final fluorescence of the organic scintillator, have been compared. Both cocktails present similar behavior. According to the Förster theory, about 6-10ns are required to complete the energy transfer. For both apparatus, the detection limits were determined for α emitters. The sensitivity of the Tri Carb was improved by 300% but remains 40% lower than that of Perals, due to a higher α/β discrimination and the use of vials with lower optical path. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Aupiais J. aut Aubert C. aut Dacheux N. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/2/2003(2003-02-01), 63-70 0033-8230 91:2/2003<63 2003 91 ract https://doi.org/10.1524/ract.91.2.63.19993 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.2.63.19993 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aupiais J. aut NATIONALLICENCE 700 1- Aubert C. aut NATIONALLICENCE 700 1- Dacheux N. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/2/2003(2003-02-01), 63-70 0033-8230 91:2/2003<63 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter