strontium-90

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strontium-90

n.
The strontium isotope with mass 90, having a half-life of 28 years, used for its high-energy beta emission in certain nuclear electric power sources and constituting a radiation hazard in fallout.
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References in periodicals archive ?
They showed that the optical selectivity of Sr-90 of the scheme is around [10.sup.6]; however, the linewidth of the third-step transition of 487 nm is so large that the isotope shift cannot be evaluated [16].
The radionuclides frequently found at the contaminated sites of foreign nuclear facilities include Am-241, Cs-137, Co-60, H3, I-129, I-131, Pu, Ra, Rn, Sr-90, Tc-99, Th, and U [2].
The Thermo Scientific Beta Plus basis-weight transmission sensor from Thermo Scientific, Wilmington, Mass., uses either a Kr-85 or Sr-90 source designed to offer users accurate, higher-resolution basis-weight readings on webs and films between 6 and 7000 g/m2.
Vartti and STUK--Radiation and Nuclear Safety Authority, "Baltic Sea Environment Fact Sheets Liquid discharges of Cs-137, Sr-90 and Co-60 into the Baltic Sea from local nuclear installations," 2011, http://helcom.navigo.fi/BSAP_assessment/ ifs/ifs2011/en_GB/Cs137Discharges/.
The total exposure dose rate of reference organisms resulting from ionising radiation of technogenic radionuclides in Lake Druksiai Insect larvae H-3, Pu-239 <1% Cs-137 40% Cs-134 1% C-14 2% Mn-54 4% Co-60 42% Sr-90 10% Vascular plant H-3, Pu-239 <1% Cs-137 40% Cs-134 1% C-14 2% Mn-54 4% Co-60 43% Sr-90 9% Crustacean H-3, Pu-239 <1% Cs-137 40% Cs-134 1% C-14 3% Mn-54 4% Co-60 41% Sr-90 1% Gastropod H-3, Pu-239 <1% Cs-137 38% Cs-134 1% C-14 4% Mn-54 4% Co-60 46% Sr-90 6% Note: Table made from pie chart.
The activities in soil for Sr-89 ranged from 13 and 260 Bq/kg and for Sr-90 between 3.3 and 32 Bq/kg.
(10,29,30) Radiation with strontium-90 (Sr-90) has shown excellent results, leading to long-term remission with minimal complications in humans, dogs, cats, and avian patients.
Health officials did not test for Strontium 90 (Sr-90), a radioactive carcinogenic byproduct of nuclear fission.
64.9%) for the subset of patients receiving Sr-90 beta radiation compared to this placebo control group.
In response to this request, the Commission has now brought forward a Recommendation to harmonise date concerning radioactivity in the environment, a harmonisation the Commission regards as particularly opportune in the longer view of European Union enlargement.The Recommendation emphasises the obligation on Member States to inform the Commission within specific deadlines of the results of monitoring of radioactivity(Cs-137, gamma, tritium, natural radionuclides, Sr-90, etc.) airborne particulates, air, surface water, water intended for human consumption, milk and "mixed diet" (trade in food products), the areas and measurement categories being outlined in Annex I.