| 摘要 |
A radiation source for a gas-discharge lamp 10, the radiation source comprising: a metal halide, comprising a metal and a halogen; and an additional source of the metal; wherein the metal halide dissociates, in use, whereby in gaseous form the ratio of metal to halogen exceeds the stoichiometric ratio of the metal halide. The metal may be zinc, Zn, magnesium, Mg, tin, Sn, or antimony, Sb. The halogen may be iodine, I or bromine, Br. A further additive, which may be a metal or a halide, may be included which radiates in the same spectral range as the metal. The radiation source may be adapted to emit in the UV spectrum which may be germicidal. The aim of the application is to provide a gas discharge lamp without mercury. When the metal halide disassociates the metal emits in the desired spectrum but the halide does not, a further source of metal is used to remove the unwanted halide by binding with it. |
