title: A simple method for activity determination of ¹³⁴Cs and ¹³⁷Cs in foodstuffs using NaI(Tl) scintillation spectrometer.
abstract: A simplified peak fitting technique for the analysis of the overlapped pulse-height spectra of (134)Cs and (137)Cs γ-rays obtained with a NaI(Tl) scintillation spectrometer was studied. In this analysis, nearly an upper half of 662 keV (137)Cs peak data was employed for fitting of the Gaussian peak using the least squares algorithm. Consistent results were obtained as compared with the reference value of test samples mixed with (134)Cs and (137)Cs standard solutions.
authors.affiliation: Japan Radioisotope Association, 2-28-45 Hon-komagome, Bunkyo, Tokyo 113-8941, Japan. tyamada@jrias.or.jp
authors.forename: T
authors.initials: T
authors.lastname: Yamada
authors.forename: H
authors.initials: H
authors.lastname: Ishizu
authors.forename: Y
authors.initials: Y
authors.lastname: Kawada
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005504:Food Analysis / Q000295:instrumentation*; D005507:Food Contamination, Radioactive / Q000032:analysis*; D007564:Japan; D011829:Radiation Dosage; D011847:Radioactive Fallout / Q000032:analysis*; D012588:Scintillation Counting / Q000295:instrumentation*; D012974:Sodium Iodide / Q000528:radiation effects; D013051:Spectrometry, Gamma / Q000295:instrumentation*
chemical_list: D002588:Cesium Radioisotopes; D011847:Radioactive Fallout; D012974:Sodium Iodide
keywords: Least-squares fitting; Overlapping peaks; Peak area; Peak fitting technique