Can Nonradiative Decay occur for a single atom?

  • Context: Graduate 
  • Thread starter Thread starter Higgy
  • Start date Start date
  • Tags Tags
    Atom Decay
Click For Summary
SUMMARY

The discussion centers on the concept of nonradiative decay in single atoms versus molecules. Participants agree that nonradiative decay, defined as transitions that do not emit photons, is not applicable to free atoms, as spontaneous emission is the only decay mechanism available. While radiationless transitions are observed in small molecules like Benzene, the consensus is that a free atom cannot undergo nonradiative decay without photon emission. Dynamic quenching mechanisms, such as Förster resonance energy transfer and Dexter electron transfer, are acknowledged but are deemed irrelevant for non-interacting free atoms.

PREREQUISITES
  • Understanding of nonradiative decay concepts
  • Familiarity with photon emission and atomic transitions
  • Knowledge of molecular dynamics and energy transfer mechanisms
  • Basic principles of quantum mechanics related to atomic behavior
NEXT STEPS
  • Research Förster resonance energy transfer mechanisms
  • Study Dexter electron transfer processes in molecular systems
  • Explore radiationless transitions in small molecules
  • Investigate the principles of spontaneous emission in quantum mechanics
USEFUL FOR

Physicists, chemists, and researchers in quantum mechanics or molecular dynamics who are exploring atomic decay processes and energy transfer mechanisms.

Higgy
Messages
43
Reaction score
0
As I understand it, "nonradiative decay" of a system from an excited state to a lower-energy state is any type of decay that does not result in the emission of an electron.

I can't think of any way that a free atom could decay without emitting a photon. Molecules, yes, (through vibration/rotation), but atoms - no. Is that true?
 
Physics news on Phys.org
Higgy said:
As I understand it, "nonradiative decay" of a system from an excited state to a lower-energy state is any type of decay that does not result in the emission of an electron.
You certainly mean photon, not electron.
Higgy said:
I can't think of any way that a free atom could decay without emitting a photon. Molecules, yes, (through vibration/rotation), but atoms - no. Is that true?

Yes, although radiationless transitions are already observed in quite small molecules like e.g. Benzene.
 
DrDu said:
You certainly mean photon, not electron.

Sorry, yes - photon. (What a strange, plasma-filled world we'd live in otherwise!)

Yes, although radiationless transitions are already observed in quite small molecules like e.g. Benzene.

Great, thank you.
 
What about dynamic quenching mechanisms, for example Förster resonance energy transfer or Dexter electron transfer, that transfer the energy of the excited state to an interacting molecule? Could these mechanisms provide a nonradiative pathway for an excited state atom to decay to the ground state?
 
Ygggdrasil said:
What about dynamic quenching mechanisms, for example Förster resonance energy transfer or Dexter electron transfer, that transfer the energy of the excited state to an interacting molecule? Could these mechanisms provide a nonradiative pathway for an excited state atom to decay to the ground state?

Yes, but the OP specified a free atom, which I took to mean that a non-interacting atom. In that case, spontaneous emission of radiation is the only available decay mechanism.
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 0 ·
Replies
0
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 1 ·
Replies
1
Views
1K
Replies
3
Views
2K
  • · Replies 10 ·
Replies
10
Views
4K