Kluge et al., "Fast, low-level detection of
strontium-90 and strontium-89 in environmental samples by collinear resonance ionization spectroscopy," Spectrochrmrca Acra, vol.
Use of
strontium-90 plesiotherapy for the treatment of a lingual plasmacitoma in a dog.
Tepco said last week that groundwater drawn from a monitoring well last July contained a record 5 million becquerels per litre of dangerous radioactive
strontium-90 -- more than five times the total beta radiation reading of 900,000 becquerels per litre recorded in the well, which is around 25 metres from the ocean.
It is reported that Russian atomic bomb tests scattered radioactive
strontium-90 over the entire earth.
Among the radionuclides, water pollution caused by
strontium-90 has captured great attention.
Tokyo Electric Power Company (Tepco) reported another incident of toxic water overflow with high levels of isotope
Strontium-90 from the containment barriers around water tanks in the aftermath of Typhoon Wipha last week.
According to Tokyo Electric Power Co.,
strontium-90 in water that had accumulated due to heavy rainfall was above the limit of 10 becquerels per liter around six clusters of tanks, with the reading in one of the areas reaching 710 becquerels.
* Radioactivity: low, from isotopes including
strontium-90 and plutonium-239
Cesium-137 accounted for more than 90% of the estimated dose, while
Strontium-90, Iodine-131 and small amounts of Plutonium-239 and Plutonium-240 contributed minor amounts to both background and ingested radiation.
For example, the half-life of the radioactive isotope
strontium-90 is just over 29 years.
Of these, radon occurs only naturally, and americium, cesium-137, cobalt-60, plutonium-239, and
strontium-90 are exclusively man-made.
The strontium used in bone formulas is not
strontium-90, the toxic radioactive isotope that nuclear fission produces.
In the 1950s, women in the United States discovered that their breast milk was contaminated with traces of radioactive
Strontium-90. And in 1958 many young mothers participated in the St.
ANSWERS: 1 Cape Kennedy; 2 Billy the Kid; 3 Six; 4 Fridtjof Nansen; 5 Sophocles; 6 Canada; 7 Indira Gandhi; 8 Spades and hearts; 9 What's Eating Gilbert Grape; 10
Strontium-90.
