Simple test to determine type of radioactive decay

Click For Summary

Discussion Overview

The discussion revolves around identifying the type of radioactive decay a specimen undergoes, specifically focusing on methods to determine whether the decay is alpha, beta, or gamma radiation. The scope includes practical testing methods and the use of detection instruments.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants suggest using a Geiger counter along with different stopping media to identify the type of radiation: alpha particles are stopped by paper, beta particles by aluminum, and gamma rays require lead for attenuation.
  • Others inquire about methods to determine the type of decay without using a Geiger counter or similar instruments, expressing a desire for alternative approaches.
  • One participant mentions that if the radioactive sample is known, it can be identified using existing resources, such as online databases.
  • Another participant notes that while a Geiger counter is the easiest detection device, there are other detectors available, including modified cameras, although they may have lower sensitivity.
  • A historical perspective is introduced, where a method involving magnetic fields is described: alpha particles are deflected in one direction due to their positive charge, beta particles in the opposite direction due to their negative charge, while gamma rays remain undeflected.

Areas of Agreement / Disagreement

Participants generally agree that some form of radiation detection is necessary to determine the type of decay. However, there is no consensus on alternative methods to a Geiger counter, and the discussion includes multiple competing views on the feasibility of such methods.

Contextual Notes

Limitations include the lack of detailed conditions under which alternative methods might work, as well as the dependence on the availability of specific detection instruments.

sonip
Messages
3
Reaction score
0
Hi Guys
Is there a simple test by which one could determine the type of decay a radioactive specimen is undergoing?
Thanks
sonip
 
Physics news on Phys.org
sonip said:
Hi Guys
Is there a simple test by which one could determine the type of decay a radioactive specimen is undergoing?
Thanks
sonip

As in ##\alpha, \beta## or ##\gamma## radiation? The easiest thing is to use a Geiger counter, and different stopping media. If the radiation stops in a couple cm of air or a bit of paper, it's ##\alpha##, ##\beta## will be stopped by a bit of aluminum, ##\gamma## won't be stopped by paper or air, but will be cut by a sheet of lead.
 
  • Like
Likes   Reactions: bcrowell
thank you. But is there anyway it could be done without gieger counter or other instruments of this type.
thanks
sonip
 
You need something that can detect radiation. A geiger counter is one of the easiest devices - unless you want to wait for days to make film a bit darker.
 
I was assuming this is an unknown sample. But of you know what it is, you can just look it up. http://www.nndc.bnl.gov/chart/reColor.jsp?newColor=dm

Otherwise, you do really need some kind of detector.
 
sonip said:
But is there anyway it could be done without gieger counter or other instruments of this type.

If you keep feeding us the conditions one line at a time it will take a long time before we have an acceptable answer. Maybe you should explain what you are looking for all at once,
 
  • Like
Likes   Reactions: bcrowell
Thank you all.
My apologies for being terse in communication.
In fact I was looking for something which could be done without Geiger counter. I was of the opinion that a coutner would be required, but the question was so open-ended, I thought I should explore.
Thank you all once again.
sonip
 
There are other radiation detectors, but a Geiger counter is the easiest one.
Cameras can be modified to be sensitive to radiation as well, but with a lower sensitivity.
 
This was done long, long time ago. Obviously, you need some kind of radiation detector. But the test that was done was using magnetic field. Alpha particle are positively charged and are deflected one way. Beta particles (electrons) are negatively charged and deflected the opposite direction. Gamma rays are not deflected at all.
 

Similar threads

  • · Replies 9 ·
Replies
9
Views
4K
  • · Replies 35 ·
2
Replies
35
Views
6K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 20 ·
Replies
20
Views
6K
  • · Replies 44 ·
2
Replies
44
Views
6K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K