Selenium-79

Long-lived fission products
t^½(my)		Yield%	KeV	β
⁹⁹Tc	.211	6.0507	294
¹²⁶Sn	.230	.0236	4050	γ
⁷⁹Se	.295	.0508	151
⁹³Zr	1.53	6.2956	91	γ
¹³⁵Cs	2.3	6.3333	269
¹⁰⁷Pd	6.5	.1629	33
¹²⁹I	15.7	.6576	194	γ

⁷⁹Se is a halflife has been variously reported as 650,000 years, 65,000 years, 1.13 million years, 480,000 years, and most recently, 295,000 years[1].

Se-79 decays by emitting a beta particle with no attendant gamma radiation. The low specific activity and relatively low energy of its beta particle limits the radioactive hazards of this isotope.

Selenium-79

See also