Ar-Hg放电正柱中Hg6~1P_1态浓度及表面185.0nm辐照度

Hg S^1P_1 EXCITED STATE DENSITIES AND 185.0 nm SURFACE IRRADIANCES IN Ar-Hg DISCHARGE COLUMNS

利用辐射谱线经电离气体后的吸收,可以确定不同直径的低气压Ar-Hg放电正柱中Hg6~1P_1态的浓度.本文选用了576.96nm(6~3D_2→6~1P_1)及579.07nm(6~1D_2→6~1P_1)两辐射线,各自测得Hg6~1P_1态浓度,结果符合较好.由测得的Hg6~1P_1态浓度数据,用光子扩散理论公式计算了这些不同直径的低气压Ar-Hg放电正柱内表面的185.0nm辐照度.结果表明直径10mm的细管Ar-Hg放电中的185.0nm表面辐照度比直径36mm的要高一个数量级以上,此结果解释了为什么紧凑型荧光灯(内径为10mm)必须采用耐185.0nm辐射的荧光粉.

A spectral line absorption method was used to determine the Hg 61P1 excited state densities in low pressure mercury vapour discharge columns of various dia-meters. Two spectral lines, 576.96nm (transition between 63D2 and 61P1) and 579.07nm (transition between 61D2 and 61P1), were separately chosen for the measurements. The results obtained were in good agreement. From, the 61P1 state density data, we calculated the 185.0nm irradiance on the inner surface of various fluorescent lamps, using the resonance radiation imprisonment theory. It was concluded thab the irradiance on the inner surface of the newly developed compact fluorescont lamps was one order larger than that of conventional fluorescent lamps, which seggested that highly stable phosphors to 185.0nm radiation or some method to re-duce the 185.0nm irradiance on phosphors was preferable in those new lamps.