TY - JOUR
T1 - Environmental 90Sr measurements
AU - Paul, M.
AU - Berkovits, D.
AU - Cecil, L. D.
AU - Feldstein, H.
AU - Hershkowitz, A.
AU - Kashiv, Y.
AU - Vogt, S.
PY - 1997/3
Y1 - 1997/3
N2 - 90Sr (T1/2 = 28.5 years) is a long-lived radionuclide produced in nuclear fission. Fast radiochemical detection of 90Sr in environmental samples is not feasible using current analytical methods. Accelerator Mass Spectrometry (AMS) measurements of 90Sr were made with the Rehovot 14UD Pelletron accelerator at a terminal voltage of 11 or 12 MV using our standard detection system. Injection of hydride ions (SrH3-) was chosen owing to high beam intensity and low Coulomb explosion effects. 90Sr ions were identified and discriminated from isobaric 90Zr by measuring time of flight, total energy and three independent energy-loss signals in an ionization chamber. A reference sample and a ground-water sample were successfully measured. The detection limit determined for a laboratory blank by the residual counts in the 90Sr region is 90Sr/Sr = 3 × 10-13, corresponding in practice to (2-4) × 107 90Sr atoms or about 0.5-1 pCi/L in environmental water samples.
AB - 90Sr (T1/2 = 28.5 years) is a long-lived radionuclide produced in nuclear fission. Fast radiochemical detection of 90Sr in environmental samples is not feasible using current analytical methods. Accelerator Mass Spectrometry (AMS) measurements of 90Sr were made with the Rehovot 14UD Pelletron accelerator at a terminal voltage of 11 or 12 MV using our standard detection system. Injection of hydride ions (SrH3-) was chosen owing to high beam intensity and low Coulomb explosion effects. 90Sr ions were identified and discriminated from isobaric 90Zr by measuring time of flight, total energy and three independent energy-loss signals in an ionization chamber. A reference sample and a ground-water sample were successfully measured. The detection limit determined for a laboratory blank by the residual counts in the 90Sr region is 90Sr/Sr = 3 × 10-13, corresponding in practice to (2-4) × 107 90Sr atoms or about 0.5-1 pCi/L in environmental water samples.
UR - http://www.scopus.com/inward/record.url?scp=0031547012&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(96)00708-2
DO - 10.1016/S0168-583X(96)00708-2
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AN - SCOPUS:0031547012
SN - 0168-583X
VL - 123
SP - 394
EP - 399
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1-4
ER -