Further investigations of the TDCR efficiency calculation technique for the direct determination of activity

Simpson, B.R.S.; Meyer, B.

doi:10.1016/0168-9002(92)90134-p

Cited by 13 publications

(1 citation statement)

References 10 publications

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“…The challenges of keeping count rates in the counter’s linearity range with a short-lived nuclide are the same for any counting method. Other instrumental factors such as the low-energy threshold, deadtime, and coincidence resolving time (CRT) can affect measured efficiencies [ 64 , 70 – 73 ]. These effects would all be expected to be small for the 18 F case.…”

Section: Techniquesmentioning

confidence: 99%

A Review of NIST Primary Activity Standards for 18F: 1982 to 2013

Bergeron¹,

Cessna²,

Coursey³

et al. 2014

J. RES. NATL. INST. STAN.

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The new NIST activity standardization for 18F, described in 2014 in Applied Radiation and Isotopes (v. 85, p. 77), differs from results obtained between 1998 and 2008 by 4 %. The new results are considered to be very reliable; they are based on a battery of robust primary measurement techniques and bring the NIST standard into accord with other national metrology institutes. This paper reviews all ten 18F activity standardizations performed at NIST from 1982 to 2013, with a focus on experimental variables that might account for discrepancies. We have identified many possible sources of measurement bias and eliminated most of them, but we have not adequately accounted for the 1998–2008 results.

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Section: Techniquesmentioning

confidence: 99%