Isotope Overview

Actinium-225

less than 1 minute read

Actinium-225 (225Ac, Ac-225) is an isotope of actinium. It undergoes alpha decay to francium-221 with a half-life of 10 days, and is an intermediate decay pr...

Americium-241

less than 1 minute read

Americium-241 is an isotope of americium. Like all isotopes of americium, it is radioactive, with a half-life of 432.2 years. 241Am is the most common isotop...

Barium-131

less than 1 minute read

Naturally occurring barium (56Ba) is a mix of six stable isotopes and one very long-lived radioactive primordial isotope, barium-130, identified as being uns...

Barium-133

less than 1 minute read

Naturally occurring barium (56Ba) is a mix of six stable isotopes and one very long-lived radioactive primordial isotope, barium-130, identified as being uns...

Caesium-137

less than 1 minute read

Caesium-137 is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fis...

Ceramic Pipe

less than 1 minute read

Parts of a ceramic drainage pipe from a house from the 1820s (roughly). Clearly shows traces of uranium and thorium, which would be used in the glaze. Somewh...

Chromium-51

less than 1 minute read

Naturally occurring chromium (24Cr) is composed of four stable isotopes; 50Cr, 52Cr, 53Cr, and 54Cr with 52Cr being the most abundant (83.789% natural abunda...

Cobalt-57

less than 1 minute read

59Co is the only stable cobalt isotope and the only isotope that exists naturally on Earth. Twenty-two radioisotopes have been characterized: the most stable...

Cobalt-60

1 minute read

59Co is the only stable cobalt isotope and the only isotope that exists naturally on Earth. Twenty-two radioisotopes have been characterized: the most stable...

Erbium-169

less than 1 minute read

Naturally occurring erbium (68Er) is composed of 6 stable isotopes, with 166Er being the most abundant (33.503% natural abundance). 39 radioisotopes have bee...

Europium-152

less than 1 minute read

Naturally occurring europium (63Eu) is composed of 2 isotopes, 151Eu and 153Eu, with 153Eu being the most abundant (52.2% natural abundance). While 153Eu is ...

Fiestaware

less than 1 minute read

Brilliant red Fiesta (and indeed the red glazes produced by all U.S. potteries of the era) is known for having a detectable amount of uranium oxide in its gl...

Germanium-68/Gallium-68

less than 1 minute read

A germanium-68/gallium-68 generator is a device used to extract the positron-emitting isotope 68Ga of gallium from a source of decaying germanium-68. The par...

Iodine-124

less than 1 minute read

Of the thirty-seven known isotopes of iodine, only one occurs in nature, iodine-127. The others are radioactive and have half-lives too short to be primordia...

Iodine-125

1 minute read

Of the thirty-seven known isotopes of iodine, only one occurs in nature, iodine-127. The others are radioactive and have half-lives too short to be primordia...

Iodine-131

1 minute read

Of the thirty-seven known isotopes of iodine, only one occurs in nature, iodine-127. The others are radioactive and have half-lives too short to be primordia...

Lanthanum-138

less than 1 minute read

Naturally occurring lanthanum (57La) is composed of one stable (139La) and one radioactive (138La) isotope, with the stable isotope, 139La, being the most ab...

Lead-210

less than 1 minute read

The longest-lived radioisotopes of lead (82Pb) are 205Pb with a half-life of 17.3 million years and 202Pb with a half-life of 52,500 years. A shorter-lived n...

Lutetium-176

less than 1 minute read

Naturally occurring lutetium (71Lu) is composed of one stable isotope 175Lu (97.41% natural abundance) and one long-lived radioisotope, 176Lu with a half-lif...

Lutetium-177(m)

1 minute read

Naturally occurring lutetium (71Lu) is composed of one stable isotope 175Lu (97.41% natural abundance) and one long-lived radioisotope, 176Lu with a half-lif...

Mercury-197m

less than 1 minute read

There are seven stable isotopes of mercury, with 202Hg being the most abundant (29.86%). The longest-lived radioisotopes are 194Hg with a half-life of 444 ye...

Pitchblende

less than 1 minute read

Uraninite, formerly pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation typi...

Potassium-40

less than 1 minute read

Potassium-40 (40K) is a radioactive isotope of potassium which has a long half-life of 1.25 billion years. It makes up about 0.012% (120 ppm) of the total am...

Radium Dial

less than 1 minute read

Radium dials are watch, clock and other instrument dials painted with luminous paint containing radium-226 to produce radioluminescence. Radium dials were pr...

Radium-226

less than 1 minute read

226Ra is the most stable isotope of radium and is the last isotope in the (4n + 2) decay chain of uranium-238 with a half-life of over a millennium: it makes...

Rhenium-186

less than 1 minute read

Used as a radiopharmaceutical, unfortunately there is not much more info on this one.

Rhenium-188

less than 1 minute read

Used as a radiopharmaceutical, unfortunately there is not much more info on this one.

Samarium-153

less than 1 minute read

Samarium-153 (153Sm) has a half-life of 46.3 hours, undergoing β− decay into 153Eu. As a component of samarium lexidronam, it is used in palliation of bone c...

Sodium-22

less than 1 minute read

Sodium has two radioactive cosmogenic isotopes (22Na, with a half-life of 2.6019(6) years; and 24Na, with a half-life of 14.9560(15) h). With the exception o...

Technetium-99m

less than 1 minute read

Technetium-99m is the hallmark technetium isotope employed in the nuclear medicine industry. Its low-energy isomeric transition, which yields a gamma-ray at ...

Thorium Source

less than 1 minute read

Thorium source bought on ebay USA. The exact composition of radioisotopes in this sample is unknown, but could be reverse-engineered with this spectrum. It s...

Uranium Glaze

less than 1 minute read

Uranium tiles have been used in the ceramics industry for many centuries, as uranium oxide makes an excellent ceramic glaze, and is reasonably abundant. The ...

Zeunerite

less than 1 minute read

Zeunerite is a green copper uranium arsenate mineral with formula Cu(UO2)2(AsO4)2•(10-16)H2O. It is a member of the autunite group. The associated mineral me...