Scientists used radioactive samarium-146 in this way, to trace events in the early solar system.
From the newscientist.com
This by itself owes to a delicate geochemical property of the element samarium, a rare element in nature.
From the sciencedaily.com
A magnetized earring is held in place by a minute cobalt-and-samarium magnet on the invisible side.
From the time.com
For instance, iPods contain small quantities of the rare earths dysprosium, neodymium, praseodymium, samarium and terbium.
From the time.com
In 1879, Lecoq de Boisbaudran succeeded in isolating samarium, from didymium contained in North Carolinian Samarskite.
From the en.wikipedia.org
China controls roughly 97 percent of the planet's rare earths market, which includes such elements as erbium, samarium and lanthanum.
From the democratandchronicle.com
The rocks were dated to 4.28 billion years by measuring the amount of samarium-146, a radioactive element with a long half-life.
From the dispatch.com
Any rocks that formed while samarium-146 was still around would today contain larger than usual quantities of neodymium-142.
From the newscientist.com
Rare earths with critical military applications include samarium, used for super-strong samarium-cobalt magnets that help steer guided missiles.
From the au.news.yahoo.com
More examples
A grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite
Samarium is a chemical element with the symbol Sm and atomic number 62.
Symbol:"Sm" Atomic Number:"62" Atomic Mass: 150.40amu. This is one of the elements in the lanthanide series of inner transition elements. It may also be classified as a rare earth element. This silvery metal has many uses in metallic alloys. ...