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 { | + | Taking the ratio <math>\frac{gamma}{neutrons}</math> gives 3.19 |
[[Image:Before shielding.JPG | 300 px]] | [[Image:Before shielding.JPG | 300 px]] | ||
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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{ | + | Taking the ratio <math> \frac{gamma}{neutrons} </math> gives 6.03 |
[[Image:After shielding.JPG |300 px]] | [[Image:After shielding.JPG |300 px]] | ||
| − | [http:// | + | [http://wiki.iac.isu.edu/index.php/October_15%2C_2008 Go Back] |
Latest revision as of 06:32, 5 February 2009
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:
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 gives 3.19
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 gives 6.03
