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<body class='hmmessage'><div dir='ltr'>Dear Wien2k users<br><br>i have a question about selection rule, in optical transitions <br>a selection rule, or transition rule, formally constrains the possible transitions <br>of a system from one state to another delta l= +- 1. <br><br>it's OK only for transitions in the same atom or in all the solid? so <br>if i have a oxide (MO2 for example) it's physically correct to say:<br> i have transitions between O(p) states and M(f) states in spite<br> of non respecting the selection rule delta l <>+-1?<br><br>thanks<br> </div></body>
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