title: Fast determination of ⁹⁰Sr/⁹⁰Y activity in milk by Cherenkov counting.
abstract: Cherenkov counting of the ⁹⁰Sr/⁹⁰Y pure beta emitters is an attractive method for ⁹⁰Sr activity determination, but the color quenching effect may be significant, especially for strongly colored or semi-opaque media. A quench correction method based on the external source of some liquid scintillation systems (named ESAR - external source area ratio) was proposed and checked for aqueous solutions and was proved to be effective also for urine samples. In the present work, the application of the ESAR method for fast determination of ⁹⁰Sr/⁹⁰Y activity in milk samples is described.
authors.affiliation: Nuclear Research Center Negev, P.O.B. 9001, 84190 Beer Sheva, Israel.
authors.forename: S
authors.initials: S
authors.lastname: Tsroya
authors.forename: B
authors.initials: B
authors.lastname: Dolgin
authors.forename: U
authors.initials: U
authors.lastname: German
authors.forename: O
authors.initials: O
authors.lastname: Pelled
authors.forename: Z B
authors.initials: ZB
authors.lastname: Alfassi
mesh_terms: D000818:Animals; D005507:Food Contamination, Radioactive / Q000032:analysis*; D007557:Israel; D057230:Limit of Detection; D008892:Milk / Q000009:adverse effects* / Q000737:chemistry*; D017785:Photons; D018788:Radioactive Hazard Release; D012588:Scintillation Counting / Q000379:methods* / Q000706:statistics & numerical data; D013326:Strontium Radioisotopes / Q000009:adverse effects / Q000032:analysis*; D013997:Time Factors; D015021:Yttrium Radioisotopes / Q000009:adverse effects / Q000032:analysis*
chemical_list: D013326:Strontium Radioisotopes; D015021:Yttrium Radioisotopes
keywords: Cherenkov; Counting; Milk