Helium Ion collision with diamond wafer

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Discussion Overview

The discussion centers on the behavior of a Helium ion (He+) when it collides with a diamond wafer surface, specifically addressing whether the ion loses its charge by gaining an electron or if the collision is elastic with no net energy change. The context includes considerations of the diamond's properties and the nature of the collision.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions whether the Helium ion will lose its charge by gaining an electron from the insulative diamond surface or if the collision will be elastic with no energy loss or gain.
  • Another participant inquires if the diamond surface is freshly cleaved, suggesting that surface conditions may affect the interaction.
  • A participant notes that the diamond wafer is chemical vapor deposited (CVD) onto a conducting surface, likely copper, which may influence the collision dynamics.
  • A later post introduces a humorous remark, possibly indicating the complexity or unexpected nature of the topic.
  • A participant provides a summary of responses from various physicists at different educational levels, indicating a consensus on elastic collisions, with one exception suggesting an initial consideration of inelastic collisions.
  • Another participant proposes that both charge loss and elastic collision processes could occur, introducing a third perspective to the discussion.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the collision, with some asserting it is elastic while others suggest the possibility of charge transfer. The discussion remains unresolved, with multiple competing views present.

Contextual Notes

The discussion includes varying assumptions about the diamond surface and the conditions of the collision, which may affect the outcomes. The responses from different physicists highlight the complexity of the topic and the potential for differing interpretations based on educational background.

Biodelta
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If a Helium ion He+ collides with a diamond wafer surface, an insulator, does the Helium ion, at 25 deg C,
will the ion lose it's charge by gaining an electron from the insulative surface or does the ion have an elastic collision with no net energy loss or gain?
 
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Freshly cleaved diamond?
 
The diamond wafer surface is chemical vapour deposited CVD onto a conducting surface probably copper.
 
... and, "Up jumps the devil."
 
Thread difficulty level changed from "A" (graduate school) to "I" (undergraduate).
 
I appreciate that you have chosen to change thread difficulty.
Separate to the physics forum on this particular question the answers per level of education have been as follows:

1/ Particle Physicist, MSC, collisions elastic.
2/ Physicist, mathematician, BSc, collisions elastic.
3/ Physicist,Ukrainian Professor, collisions elastic.
4/ Nuclear Physicist, PhD, German elastic.
5/ Australian Professor, ANSTO, initial consideration elastic, then changed to inelastic.

Accordingly, I wonder whether an undergraduate would be able to answer the question.

Regards,
Stuart
 
There is a third option that both processes are possible.
 

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