Can an electron which is a bound in an atom absorb more than one photon at the same time ? In specific during photo-electric emission can an electron take in more than one photon if one photon doesn't give it the energy required to drift away from the atom
1
-
$\begingroup$ One should keep in mind that it is the system "electron+nucleus " that absorbs the photon(s). $\endgroup$– anna vCommented Mar 3, 2015 at 12:03
Add a comment
|
1 Answer
$\begingroup$
$\endgroup$
1
Yes, this is actually often used in a spectroscopic technique called REMPI -- see the image on this wikipedia page https://en.wikipedia.org/wiki/Resonance-enhanced_multiphoton_ionization
There are some important physics techniques that rely on interaction with two photons -- two photon spectroscopy (http://cua.mit.edu/8.421_S06/Chapter9.pdf).
Some other techniques, like Raman spectroscopy, involve interaction with two photons (but one absorbed, one emitted).
-
$\begingroup$ And multi-photon ionisation can occur where such a number of photons is absorbed from an intense laser source that enough energy is available for removal of the electron from the remaining ion, see en.wikipedia.org/wiki/Photoionization#Multi-photon_ionization $\endgroup$– UrgjeCommented Mar 3, 2015 at 18:30