The hydrogenic 2s1s twophoton emission
Abstract
The authors give an analytical expression for the probability of the hydrogenic twophoton decay. The expression allows a very accurate description of the twophoton continuum. For the total hydrogen 2s→1s twophoton transition probability a value of A_{2q} = 8.2249 s^{1} is found.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 September 1984
 Bibcode:
 1984A&A...138..495N
 Keywords:

 Continuous Spectra;
 H Lines;
 Nebulae;
 Radioactive Decay;
 Transition Probabilities;
 Ultraviolet Astronomy;
 Atomic Spectra;
 Decay Rates;
 Emission Spectra;
 Hydrogen Clouds;
 Photons;
 Astrophysics