24小时热门版块排行榜    

查看: 237  |  回复: 2
当前主题已经存档。
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

sipei

金虫 (正式写手)

[交流] Fluorenscence 和 Luminescence

大家知不知道Fluorenscence 和 Luminescence之间的区别?
回复此楼

» 猜你喜欢

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

ddjyg

铜虫 (小有名气)

Luminescence

Luminescence is light not generated by high temperatures alone. It is different from incandescence, in that it usually occurs at low temperatures and is thus a form of cold body radiation. It can be caused by, for example, chemical reactions, electrical energy, subatomic motions, or stress on a crystal. The following kinds of luminescence are known:

Chemoluminescence
    Bioluminescence
Crystalloluminescence
Electroluminescence
   Cathodoluminescence
Mechanoluminescence
   Triboluminescence
   Fractoluminescence
   Piezoluminescence
Photoluminescence
   Phosphorescence
   Fluorescence
Radioluminescence
Sonoluminescence
Thermoluminescence

Historically, radioactivity was first thought of as a form of "radioluminescence", although it is today considered to be separate since it involves more than electromagnetic radiation.

The process of coating dials, hands, scales and signs on, particularly, aviation and navigational instruments and markings with luminescent materials is known as luminising.

[ Last edited by ddjyg on 2007-5-2 at 13:06 ]
3楼2007-05-02 13:01:57
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 3 个回答

bern

铁杆木虫 (著名写手)

★ ★
hzsch-1978(金币+2):谢谢你热心的虫友啊!
Fluorenscence是荧光
Luminescence 是磷光

区别是分子吸收光子后由激发态返回基态时跃迁的路径不一样。

荧光:10-7~10 -9 s,第一激发单重态的最低振动能级→基态;
磷光:10-4~10s;第一激发三重态的最低振动能级→基态;

荧光发射:电子由第一激发单重态的最低振动能级→基态( 多为 S1→ S0跃迁),发射波长为  ‘2的荧光; 10-7~10 -9 s 。

磷光发射:电子由第一激发三重态的最低振动能级→基态( T1 → S0跃迁);
         电子由S0进入T1的可能过程:( S0 → T1禁阻跃迁)
S0 →激发→振动弛豫→内转移→系间跨越→振动弛豫→ T1
         发光速度很慢: 10-4~100 s 。
      光照停止后,可持续一段时间。

给你一个ppt,里面介绍的比较多。
2楼2007-05-02 11:08:25
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
普通表情 高级回复 (可上传附件)
信息提示
请填处理意见