Difference between revisions of "KJM5911 Lab Exercise 4 - Szilard-Chalmers Reaction and Liquid-Scintillation Counting"
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*The difference between radioactivity with or without carrier.<br> | *The difference between radioactivity with or without carrier.<br> | ||
*Szilard-Chalmers method to produce carrier-free radioactive halides.<br> | *Szilard-Chalmers method to produce carrier-free radioactive halides.<br> | ||
+ | *Understand the theory behind Liquid Scintillation detection. | ||
+ | *Understand how the detection equipment in Liquid Scintillation works. | ||
=== Theory === | === Theory === | ||
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*[[Nucleus Recoil-Energy in Neutron Capture Reactions|Nucleus Recoil-Energy in Neutron Capture Reactions]] | *[[Nucleus Recoil-Energy in Neutron Capture Reactions|Nucleus Recoil-Energy in Neutron Capture Reactions]] | ||
*[[Theory for the Szilard-Clalmers Reaction|Szilard-Chalmers Reaction]] | *[[Theory for the Szilard-Clalmers Reaction|Szilard-Chalmers Reaction]] | ||
+ | *[[Introduction Liquid Scintillation|Introduction to Liquid Scintillation]] | ||
+ | *[[LSC Principles]] | ||
+ | *[[Interfering Processes]] | ||
+ | *[[Alpha/beta-Discrimination]] | ||
=== Experimental Procedure === | === Experimental Procedure === | ||
− | + | *Student Guide - [[Practical Exercise For Liquid Scintillation]] | |
− | + | *Student Guide - [[Practical Exercise For Szilard-Chalmers Reaction ]] | |
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=== Reports === | === Reports === |
Latest revision as of 13:57, 21 October 2013
Learning Goals
After this exercise, you should know about and understand the following topics:
- The difference between radioactivity with or without carrier.
- Szilard-Chalmers method to produce carrier-free radioactive halides.
- Understand the theory behind Liquid Scintillation detection.
- Understand how the detection equipment in Liquid Scintillation works.
Theory
- Yield in Neutron Activation and Nuclear Reactions
- Neutrons
- The 238Pu/9Be n-source
- Nucleus Recoil-Energy in Neutron Capture Reactions
- Szilard-Chalmers Reaction
- Introduction to Liquid Scintillation
- LSC Principles
- Interfering Processes
- Alpha/beta-Discrimination
Experimental Procedure
- Student Guide - Practical Exercise For Liquid Scintillation
- Student Guide - Practical Exercise For Szilard-Chalmers Reaction
Reports
For this exercise you should write a report with a two-page limit explaining about what you did and your results.
Safety Aspects
- Only the supervisor is allowed to fetch irradiated ethyliodine, no one else is authorized to handle the n source. The radiation field close to the source is rather intense and all handling is done with remote manipulation-tools. If you company your supervisor to watch, ensure that you stand at least one metre away from the source.
- The amount of radioactivity after the n irradiation is barely measurable, so normal C-type lab rules apply. The short half-life makes it easy to handle waste and possible contaminations - it will be gone by tomorrow.
- Normal chem. lab safety rules should of course be followed, but there are no particular dangers.
- Make sure to ballance the centrifuge properly, and remember that the density of the ethyliodide solution is much higher than the one for water!