Difference between revisions of "All 3 detectors working"

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The number of counts for the neutrons (Channels 2500-4096) = 256
 
The number of counts for the neutrons (Channels 2500-4096) = 256
  
Taking the ratio <math> \frac{γ}{n} </math> gives 3.19
+
Taking the ratio <math> \frac {γ}{n} </math> gives 3.19
  
 
[[Image:Before shielding.JPG | 300 px]]
 
[[Image:Before shielding.JPG | 300 px]]
Line 28: Line 28:
 
The number of counts for the neutrons (Channels 2500-4096) = 187
 
The number of counts for the neutrons (Channels 2500-4096) = 187
  
Taking the ratio <math> \frac{γ}{n} </math> gives 6.03
+
Taking the ratio <math> \ frac{γ}{n} </math> gives 6.03
  
 
[[Image:After shielding.JPG |300 px]]
 
[[Image:After shielding.JPG |300 px]]
  
 
[http://www.iac.isu.edu/mediawiki/index.php/October_15%2C_2008 Go Back]
 
[http://www.iac.isu.edu/mediawiki/index.php/October_15%2C_2008 Go Back]

Revision as of 23:55, 17 October 2008

Detector A: High Voltage = 1900V; Threshold = 5mV

Detector C: High Voltage = 1860V; Threshold = 10mV

Detector D: High Voltage = 1950V; Threshold = 5mV

Note: Really high background in the experimental cell, so more shielding was added: i.e. paraffin wax.

Experimental cell setup after adding addition shielding:

Apparatus October 2008.JPG

Graph before shielding:

The number of counts for the gamma flash (Channels 2000-2500) = 818

The number of counts for the neutrons (Channels 2500-4096) = 256

Taking the ratio [math] \frac {γ}{n} [/math] gives 3.19

Before shielding.JPG


Graph after shielding:

The number of counts for the gamma flash (Channels 2000-2500) = 1127

The number of counts for the neutrons (Channels 2500-4096) = 187

Taking the ratio [math] \ frac{γ}{n} [/math] gives 6.03

After shielding.JPG

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