Measurement of the Specific -Activity
in Environmental Objects

A. M. Blekhman, N. T. Burtebaev, A. Duisebaev, B. A. Duisebaev,
G. N. Ivanov^†, K. A. Kuterbekov, A. M. Seitimbetov, and D. G. Chelapkin

Institute of Nuclear Physics, Daughter State Enterprise of the National Nuclear Center of Kazakhstan,
ul. Ibragimova 1, Almaty, 480082 Kazakhstan
e-mail: adm@burt.academ.alma-ata.su

Received April 20, 2000

Abstract—We describe a new technique for nuclear-radiation spectrometry and identification by the pulse’s shape
in CsI(Tl) scintillators. The specific -activity of soil samples taken from the Adit 139 and the Southeast Trace of the
Semipalatinsk Test Range was determined by the method of -particle identification in a CsI(Tl) crystal at a 1MeV
detection threshold. The results were compared to the data obtained using radiochemical separation.

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