Difference between revisions of "All 3 detectors working"
Jump to navigation
Jump to search
| Line 17: | Line 17: | ||
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 23:57, 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:
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
