Improvements in determinations using the Cu-64 annihilation gamma rays

Bryan E Tomlin; Rolf Zeisler

doi:10.1016/j.apradiso.2009.05.002

Improvements in determinations using the Cu-64 annihilation gamma rays

Appl Radiat Isot. 2009 Dec;67(12):2075-8. doi: 10.1016/j.apradiso.2009.05.002. Epub 2009 May 20.

Authors

Bryan E Tomlin¹, Rolf Zeisler

Affiliation

¹ National Institute of Standards and Technology, Analytical Chemistry Division, 100 Bureau Drive MS 8395, Gaithersburg, MD 20899-8395, USA. [email protected]

PMID: 19535258
DOI: 10.1016/j.apradiso.2009.05.002

Abstract

The method of gammagamma coincidence counting has been applied to the determination of Cu via the (64)Cu annihilation gamma rays. Preliminary experiments show that at least an order of magnitude reduction in (24)Na interference may be obtained by employing the 511-511 keV coincidence peak rather than the singles 511-keV peak. The effect of the sample matrix on the yield of (24)Na pair-production events was investigated by a combination of experimental measurements and Monte Carlo calculations.