Hello all, I've been reading about laser cooling, and when they speak of tuning the laser to a atomic transition, they write this (for example) as(adsbygoogle = window.adsbygoogle || []).push({});

"The laser cooling was performed on the [tex]D_2[/tex] transition ([tex]3S_{1/2} \rightarrow 3 P_{3/2}[/tex])".

But what do they mean by that notation? I'm clueless as what it is supposed to mean as it doesn't look like the spectroscopic notation (i.e the number 3 is NOT in superscript).

Best regards,

Jon

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Atomic transition - What does this notation mean?

**Physics Forums | Science Articles, Homework Help, Discussion**