Sentences with phrase «excited electron paired»
The exciton is the excited electron paired...
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This cascading process occurs in many pairs of excited atoms, resulting in the emission of a large number of low - energy electrons.
In a series of experiments, the team fired an unspeakably brief, extremely ultraviolet laser pulse at a helium atom to start exciting its pair of electrons.
When both members of the pair became excited, one of them would normally fall to the lower rung before being struck by an incoming photon, producing no photon along the way and leaving too few excited electrons to make laser light.
To do this, they fired ultraviolet laser pulses lasting 100 to 200 attoseconds (10 - 18 seconds) at a helium atom to start exciting its pair of electrons.