title: Radioactivity measurements of 177Lu, 111In and 123I by different absolute methods.
abstract: The activities of (177)Lu, (111)In and (123)I solutions have been absolutely determined using three different measurement methods. (177)Lu solution was standardized using the 4πβ(PC)-γ(NaI) coincidence and 4πβ(LS)-γ(NaI) live-timed anticoincidence methods. For the (111)In and (123)I solutions, besides these two mentioned methods, the coincidence sum-peak method was also applied. The measured activities results using these different methods are consistent within the evaluated experimental uncertainties demonstrating the equivalence of these methods. As an additional contribution to nuclear data, the half-lives have been determined using a well type IG12 ionization chamber.
authors.affiliation: Laboratório Nacional de Metrologia das Radiações Ionizantes/Instituto de Radioproteção e Dosimetria/Comissão Nacional de Energia Nuclear (LNMRI/IRD/CNEN), Av. Salvador Allende s/no. Recreio, CEP 22780/160, Rio de Janeiro, Brazil.
authors.forename: E A
authors.initials: EA
authors.lastname: Rezende
authors.forename: A R
authors.initials: AR
authors.lastname: Correia
authors.forename: A
authors.initials: A
authors.lastname: Iwahara
authors.forename: C J
authors.initials: CJ
authors.lastname: da Silva
authors.forename: L
authors.initials: L
authors.lastname: Tauhata
authors.forename: R
authors.initials: R
authors.lastname: Poledna
authors.forename: R L
authors.initials: RL
authors.lastname: da Silva
authors.forename: E M
authors.initials: EM
authors.lastname: de Oliveira
authors.forename: A E
authors.initials: AE
authors.lastname: de Oliveira
mesh_terms: 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
chemical_list: D011868:Radioisotopes