Development of a primary standard for calibration of ⁶⁴Cu activity measurement systems

Author:

M. Capogni   P. De Felice   A. Fazio   F. Latini   K. Abbas  

Journal:

Applied Radiation and Isotopes

Issue Date:

2008

Abstract(summary):

A ⁶⁴Cu national primary standard, was developed by the National Institute for Ionising Radiation Metrology (INMRI) of the ENEA (ENEA-INMRI) using the CIEMAT/NIST method of 4πβ liquid scintillation spectrometry with ³H-standard efficiency tracing. Relatively short ⁶⁴Cu half-life is required for the work to be performed at the production site. It was produced at the Scanditronix MC40 Cyclotron of the Joint Research Centre (JRC) of the European Commission (Ispra, Italy) through the ⁶⁴Zn(d,2p) ⁶⁴Cu reaction. Significant efforts were made to identify and quantify the impurities of ⁶¹Cu and ⁶⁵Zn in the mother solution, which were activated through the ⁶⁴Zn(d,n) ⁶¹Cu and ⁶⁴Zn(d,p) ⁶⁵Zn reactions, respectively. To this purpose, a new procedure for the determination of pure β-emitter impurities by the CIEMAT/NIST method has been applied. A transfer standard portable well-type ionisation chamber was also calibrated with minimum uncertainty.

Page:

948-953