Which type of laser are easier to make ? Micro-wave (MASER), infrared, visible light, UV... ?
Which type of light leads in an easier way to a population inversion ? Is it maser because the level energy involved are closed ?
I don't really undestand the difference between these two terms.
Stuttgart Librairy is a pseudopotential, right ?
What is SDD? (I've seen that this is a EDP too is that ok?)
So what does that mean if we say that we take a Stuttgar t effective core SDD basis set ?
What is the difference...
How does the inclusion of a fraction of the HF "exact exchange energies" in an hybrid functional (B3LYP for example) can degrade the quality of the results ? I mean that the results are worst than expected because of the HF exchange, but if we call it "exact" how is it possible ?
Can we make a laser with any type of radiance (IR,UV,visible,microwave,..) ? If we consider a three level system for example.
In such a system, how can we avoid absorption from level 1 to level 2 ? Is it by choosing atoms/molecules in which the level 2 is greater than the fundamental ...
I've read an article about computational chemistry in which the authors were performing a geometry optimization. For this purpose, they firstly optimized the geometry at HF/6-311++G(d,p) level with full relaxation on the potentiel energy surface (what does that mean exactly ? Can we extract this...