title: Application of the sum peak method to determine the perturbed angular correlation parameters in biological specimens.
abstract: The counting rate of a sum peak formed by two gamma-ray emissions in radioactive decay of a nuclide depends on its integral attenuation factor G22. Therefore, in the "sum peak method", the G22 value for the specimen in question can be obtained merely from sum peak measurements using one radiation detector when the resolution time and the geometry are fixed. The procedure to determine the G22 values is described for specimens containing 111In, together with the detailed relationships between the sum peak counting rates and the values of G22.
authors.affiliation: RI Laboratory, Fukushima Medical College, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kudo
authors.forename: N
authors.initials: N
authors.lastname: Tsuchihashi
authors.forename: T
authors.initials: T
authors.lastname: Yui
authors.forename: T
authors.initials: T
authors.lastname: Mitsugashira
authors.forename: H
authors.initials: H
authors.lastname: Kaji
authors.forename: K
authors.initials: K
authors.lastname: Yoshihara
mesh_terms: D000818:Animals; D001792:Blood Platelets; D002417:Cattle; D006801:Humans; D007205:Indium Radioisotopes; D007553:Isotope Labeling; D011874:Radiometry / Q000295:instrumentation; D014168:Transferrin; D014334:Tropolone
chemical_list: D007205:Indium Radioisotopes; D014168:Transferrin; D014334:Tropolone