Half-life: 1.17 min
Main emission lines: 766keV, 1001keV
Decay chain: U (235-238) (Purified)
Related lines : 65keV, 95keV, 185keV, 750keV, 1001keV
A decay product of uranium, visible in the spectra of purified uranium, is not clearly seen in natural uranium due to the presence of Radium-226.