Radioactive Man

Real Name: Chen Lu

Radioactive Man purposely exposed himself to high quantities of radiation in hopes of gaining super-powers, with some measure of success. He can absorb and expel radiation across the spectrum, from heat blasts to high-intensity bursts that can rob objects of their inertia (stopping Thor's hammer in mid-flight). He is super-strong, and highly resistant to damage. He was imprisoned in the Cube until the world's super-prisons failed.

The Radioactive Man was recently tricked into attacking Stark Industries by Ultron as a diversion, in an attempt to absorb the energy from Stark's Arc Reactor.  He was defeated by the Avengers, and taken into SHIELD custody.