Device for the measurement of 227 Ac in solid samples

Crawford, Darren; Frazier, W. K.; Reynolds, Bill; Patch, K.D.; Haywood, F.F.; Goldsmith, W.A.; Perdue, P.T.; Berven, B.A.

doi:10.1063/1.1136748

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2014

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“…There are many methods to measure 227 Ac or 223 Ra, such as -spectrometry, -spectrometry and emanation method [5][6][7][8][9][10][11][12]. The -spectrometry method requires a radiochemical separation before measurement, making it hard to operate.…”

Section: Introductionmentioning

confidence: 99%

Extraction and purification of ²²⁷Ac and development of solid ²¹⁹Rn source

et al. 2014

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The method of 227 Ac extraction and purification from high-grade uranium ore and the test results of solid 219 Rn source made from 227 Ac are reported in this paper. With five years of follow-up monitoring, radiochemical purity of 227 Ac and the emanation power of solid 219 Rn source has been checked by emanation method andspectrometry, the results showed that 228 Th, 231 Pa and 226 Ra have been effectively removed and the emanation power of 219 Rn source is about 80%. The long-term test results also showed that the 219 Rn emanation rate remains stable in ařwide air humidity range (40% ∼ 90%). Though the 219 Rn source has not been accurately calibrated yet, it has been applied in the research for delay coincidence measurement of 223 Ra.

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