title: Standardization of 65Zn by sum-peak method.
abstract: A commercial solution of (65)Zn was standardized by the sum peak-method using a planar HPGe detector. The activity results were compared with measurements made with a well type 4πγ ionization chamber, which is traceable to BIPM.RI (II)-K2.Zn-65 key-comparison performed in 2002. The sum-peak value was 42.79 kBq/g and the ionization chamber value was 42.74 kBq/g both at the reference date. The uncertainty obtained in the sum peak standardization was 0.25% (k=1), and in the ionization chamber was 0.85% (k=1). The results showed that sum-peak method can be used in (65)Zn standardization and this method is easier, simpler and more practical than others methods.
authors.affiliation: Laboratório Nacional de Metrologia das Radiacões Ionizantes (LNMRI/IRD/CNEN), Av. Salvador Allende, s/n, Recreio, CEP 22780-160 Rio de Janeiro, Brazil. estela@ird.gov.br
authors.forename: E M
authors.initials: EM
authors.lastname: Oliveira
authors.forename: A
authors.initials: A
authors.lastname: Iwahara
authors.forename: R
authors.initials: R
authors.lastname: Poledna
authors.forename: J U
authors.initials: JU
authors.lastname: Delgado
authors.forename: C J
authors.initials: CJ
authors.lastname: da Silva
authors.forename: R L
authors.initials: RL
authors.lastname: da Silva
authors.forename: R T
authors.initials: RT
authors.lastname: Lopes
mesh_terms: D000465:Algorithms; D006207:Half-Life; D038622:Internationality; D011829:Radiation Dosage; D011868:Radioisotopes / Q000032:analysis* / Q000737:chemistry / Q000592:standards*; D011874:Radiometry / Q000295:instrumentation* / Q000592:standards*; D012015:Reference Standards; D012016:Reference Values; D012666:Semiconductors; D015037:Zinc Radioisotopes / Q000032:analysis* / Q000737:chemistry / Q000592:standards*
chemical_list: D011868:Radioisotopes; D015037:Zinc Radioisotopes