H. Nuclide Library
. . . continuation
Palladium
103
Pd 17 d Medically used material
Used to make sealed-source, radiotherapy
implant “seeds” for implanting into the
prostate as a means of treating early stage
prostate cancer.
Plutonium
239
Pu 24100 a Special nuclear material
Used to build most nuclear fission
weapon, bombs, and warheads.
Potassium
40
K 1.277 Ga Naturally occurring radioactive material
There are no specific commercial or med-
ical uses for this isotope of potassium, but
is occurring naturally. Typical concentra-
tions found in food deliver 140-180 µSv/a.
Higher
40
K concentrations can present a
considerable cancer inducing risk.
Radium
226
Ra 1600 a Naturally occurring radioactive material
A decay product of uranium and thorium,
it occurs in virtually all rock, soil, and wa-
ter in low concentrations. Twenty percent
of the
226
Ra that is ingested via food and
water is deposited into the bone. Although
this makes the isotope dangerous itself,
it presents its greatest risk when it decays
into
222
Ra, which is an odorless, tasteless,
radioactive gas that can be inhaled into the
lungs.
to be continued. . .
Thermo Fisher Scientific Interceptor™/en/5.1(4956)/Feb2010 145
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