Confused about quantum principles

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Discussion Overview

The discussion centers on the differences between excitation, de-excitation, and ionization within the context of atomic and quantum physics. Participants explore the definitions and implications of these terms, particularly in relation to energy levels and electron behavior in atoms.

Discussion Character

  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants propose that excitation refers to an increase in energy levels of electrons, while de-excitation involves a return to lower energy levels.
  • Others argue that ionization is distinct from excitation and de-excitation, specifically involving the complete removal of an electron from an atom.
  • A participant explains that excitation can occur through mechanisms such as photon absorption or collisions, leading to potential de-excitation processes.
  • Another viewpoint suggests that ionization occurs when an electron gains enough energy to escape the atom, transitioning from a bound state to a free state.
  • One participant mentions the relationship between these processes and the energy spectrum, indicating that excitation and de-excitation involve discrete energy levels, while ionization relates to the continuous spectrum.

Areas of Agreement / Disagreement

Participants express varying interpretations of the terms, with no consensus reached on whether de-excitation and ionization are the same or how they relate to excitation. The discussion remains unresolved regarding the nuances of these concepts.

Contextual Notes

Limitations include potential ambiguities in definitions and the need for clarity on the conditions under which these processes occur. The discussion does not resolve the mathematical or conceptual intricacies involved.

rama1001
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Can anyone guide me ragarding the difference between excitation, de-excitation and ionization. I just confused with the terms de-excitation and ionization, wether they are same..please guide me..
 
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Excitation and de-excitation refers to energy levels. an excited state is a state with more energy than the ground state, which is the lowest energy level. Excitation means the system is moving to a higher energy level, while de-exitation means that the system is moving to a lower energy level.

Ionization is a term unique to atoms, as far as I know, and refers to an electron being completely removed from its previously neutral host atom (or getting excited beyond the inifite-th energy state and into the continuum, if you want). It can also be used about a neutral atom picking up an electron.
 
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With regard to an atom, excitation is an increase in the (quantized) energy of an orbiting electron (typically via collision or absorption of a photon). It may then undergo de-excitation (emitting a photon, or via collision giving up that energy to kinetic energy of the whole atom or of another particle.)

In the extreme case an excitation may "kick" the orbiting electron beyond the "escape energy" so it is no longer bound to the atom. This is ionization, splitting the atom into a free electron and free ion.
 
rama1001 said:
Can anyone guide me ragarding the difference between excitation, de-excitation and ionization. I just confused with the terms de-excitation and ionization, wether they are same..please guide me..

In terms of the spectrum, excitation means raising the energy to a higher discrete level, de-excitation lowering it ti a lower discrete value, ionization means raising it into the continuous spectrum (which means the particle escapes the potential it is in), and capture the transition from the continuous spectrum to a discrete level. Typically, the potential is the effective potential of an atom or molecule without the particle in question.
 

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