Micka, "A new internal pair production branching ratio of 90Y: the development of a non-destructive assay for 90Y and 90Sr
," Applied Radiation and Isotopes, vol.
The doses contributions from ingested 137Cs 14C and 90Sr
were also included to these doses .
Manchanda, "Separation of 90Y from 90Sr
using zirconium vanadate as the ion exchanger," Applied Radiation and Isotopes, vol.
Uncertainties in dose coefficients from ingestion of 131I, 137Cs, and 90Sr
. Health Phys 86(5):460-482.
[sup.137]Cs i 90Sr
v pochvakh Litvy, Geo chemia (7): 794-800.
Data obtained during survey decreasing trend of 137cs and 90sr
concentrations in sea water with time is observed from 1967 to 1995.
Production of long lived parent radionuclides for generators; 68Ge, 82Sr, 90Sr
Natural (210Pb, 7Be) and fallout (137Cs, 239,240Pu, 90Sr
) radionuclides as geochemical tracers of sedimentation in Greifensee, Switzerland.
I was now using ion-exchange by the truckload, quite a change from my first experience with it in Professor Tomlinson's undergraduate laboratory where we used a thimble full of ion-exchange resin to separate 90Y from 90Sr
. I also had to become familiar with pumps, heat-exchangers and other bits and pieces of electrical and mechanical equipment that were totally foreign to my chemical background.
A subset of 39 samples of various tissues was analyzed for the alpha and beta emitters 239,240Pu and 90Sr
. Plutonium levels were near the threshold of detectability (~0.1 Bq kg-1dry weight) in 6 of the 39 samples; all other samples had no detectable plutonium.
The thesis details research involving sodium nonatitanate, a more efficient ion exchanger, to separate the highly radioactive isotopes (90Sr
, 137Cs, and transuranics) from the large quantities of inert salts.
89Sr and 90Sr
are the prominent radionuclides of strontium that are formed, with [sup.45.Sr] being one of the most hazardous because of its deposition in the skeleton, its long biological half-life (~10 years), and a decay half-life of ~30 years.