title: Performance demonstration of 4πβ(LS)-γ coincidence counting system for standardization of radionuclides with complex decay scheme.
abstract: A standardization of (134)Cs and (131)I was carried out in order to demonstrate the performance and applicability of the 4πβ(LS)-γ coincidence counting system for standardization of radionuclides with complex decay scheme. The coincidence analyzer, capable of analyzing coincidence between beta and two gamma windows simultaneously, was developed and used for the standardization. The use of this dual coincidence analyzer has reduced the total experimental time by half. The activity concentrations obtained using the 4πβ(LS)-γ coincidence counting system, a 4πβ(PC)-γ coincidence counting system, and the CIEMAT/NIST method are in excellent agreement with each other within uncertainty limits and hence demonstrates its performance for standardization of radionuclides decaying with complex decay scheme. Hence use of this 4πβ(LS)-γ coincidence counting system can be an alternative method suitable to standardize radionuclides with complex decay scheme with acceptable precision.
authors.affiliation: Radiological Physics & Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India. Electronic address: devak@barc.gov.in.
authors.forename: D B
authors.initials: DB
authors.lastname: Kulkarni
authors.affiliation: Radiological Physics & Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: R
authors.initials: R
authors.lastname: Anuradha
authors.affiliation: Radiological Physics & Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: Leena
authors.initials: L
authors.lastname: Joseph
authors.affiliation: Radiological Physics & Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: M S
authors.initials: MS
authors.lastname: Kulkarni
authors.affiliation: Radio Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: B S
authors.initials: BS
authors.lastname: Tomar
keywords: (131)I CIEMAT/NIST; (134)Cs; 4πβ(LS)-γ coincidence counting system; 4πβ(PC)-γ coincidence counting system; Dual coincidence analyzer