Difference between revisions of "KJM5911 Lab Exercise 4 - Szilard-Chalmers Reaction and Liquid-Scintillation Counting"

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=== Learning Goals  ===
 
=== Learning Goals  ===
  
After this exercise, you should know about and understand the following topics:<br>
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After this exercise, you should know about and understand the following topics:<br>  
  
*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>
*<br>
+
*Understand the theory behind Liquid Scintillation detection.
 
+
*Understand how the detection equipment in Liquid Scintillation works.
<br>
 
  
 
=== Theory  ===
 
=== Theory  ===
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*[[Yield in Neutron Activation and Nuclear Reactions|Yield in Neutron Activation and Nuclear Reactions]]<br>  
 
*[[Yield in Neutron Activation and Nuclear Reactions|Yield in Neutron Activation and Nuclear Reactions]]<br>  
 
*[[Neutrons|Neutrons]]  
 
*[[Neutrons|Neutrons]]  
*The <sup>238</sup>Pu/<sup>9</sup>Be n-source
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*The <sup>238</sup>Pu/<sup>9</sup>Be n-source  
*Nucleus-Recoil Energy in Neutron Capture Reactions
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*[[Nucleus Recoil-Energy in Neutron Capture Reactions|Nucleus Recoil-Energy in Neutron Capture Reactions]]
*Szilard-Chalmers Reaction
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*[[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 ]]
  
 
=== Reports  ===
 
=== Reports  ===
 +
 +
For this exercise you should write a report with a ''two-page limit'' explaining about what you did and your results.
  
 
=== Safety Aspects  ===
 
=== 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!
  
 
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Latest revision as of 12:57, 21 October 2013

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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

Experimental Procedure

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!