Methods and systems for sterilization are disclosed, including placing one or more UV light sources located substantially at one or more foci of a substantially ellipsoidal reflecting surface coated enclosure； and generating UV radiation from the one or more UV light sources to sanitize one or more objects positioned between the foci of the substantially ellipsoidal reflecting surface coated enclosure； wherein the one or more UV light sources comprises a beam from a KrF Excimer laser being scattered by a spherically scattering sphere； wherein the KrF Excimer laser is configured to emit light pulses having a wavelength of about 248 nm； wherein the KrF Excimer laser is configured to emit nanosecond light pulses； and wherein the spherically scattering sphere comprises a hollow fused silica filled with solid fused silica spheres. Other embodiments are described and claimed.
