Difference between revisions of "05/11/2011"
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| − | So it looks like my previous threshold value (-500 V) was not good. Let's set it up the -200 V. And let's see does the n's detector sensitive to the source | + | So it looks like my previous threshold value (-500 V) was not good. Let's set it up the -200 V. And let's see does the n's detector sensitive to the source. The same set up and distances as before. |
{| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;" | {| border="1" cellspacing="0" style="text-align: center; width: 800px; height: 100px;" | ||
! scope="col" width="50" | | ! scope="col" width="50" | | ||
! scope="col" width="50" | counts/sec (5 min test), no source | ! scope="col" width="50" | counts/sec (5 min test), no source | ||
| − | ! scope="col" width="50" | counts/sec (5 min test), with source on the top of | + | ! scope="col" width="50" | counts/sec (5 min test), with source on the top of PS1 |
|- | |- | ||
!n's | !n's | ||
| − | | | + | |19.89<math>\pm</math>0.26 (5966 cnts) || |
|} | |} | ||
Revision as of 20:02, 11 May 2011
Because is something wrong I decided to measure the counts rate as function of threshold energy. Maybe my threshold was incorrect.
Below are my results for n's detector with HAMAMATSU PMT (-1500 V):
So it looks like my previous threshold value (-500 V) was not good. Let's set it up the -200 V. And let's see does the n's detector sensitive to the source. The same set up and distances as before.
| counts/sec (5 min test), no source | counts/sec (5 min test), with source on the top of PS1 | |
|---|---|---|
| n's | 19.890.26 (5966 cnts) |