Vanadium-doped glass
The vanadium-glass gives an extended strong UV-near visible absorption up to about 700 nm and revealing four UV peaks at about 230, 300, 380 nm and high intense four near visible peaks at about 430, 480, 520 and 560 nm. On subjecting the glass to gamma irradiation. The UV absorption remains unchanged and a new induced visible is identified at about 650 nm.