Hello I am Colin from Canada
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Welcome, these forums are for professional and amateur scientists to discuss matters relating to radiation detection, and to facilitate friendly and honest collaboration. It is a requirement for all members to register using their real names and location. If your name has not already been used, feel free to use it as a login handle, otherwise add your name and location to the bottom of your posts as a default signature. Thanks for cooperating.
BUSINESS REGISTRATIONS
If you have a rad related business and want to post information about your products you may do so in the trading post, providing you first introduce your business formally in the introductions forum and add your business details in the signature sections so it is clear to everyone that your post has a commercial purpose.
Hello I am Colin from Canada
Hello. I'm in Colin in Canada. I have a 1.5 inch NaI with a well, with an inch of lead around it but I'm I'm getting a double peek for for cs137 with a cs137 source. The double goes away when I filter the results for shape.
-Colin in Canada
1.5" NaI with well. 1" thick pure lead (foil) with copper liner.
1.5" NaI with well. 1" thick pure lead (foil) with copper liner.
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Sesselmann
- Posts: 929
- Joined: 27 Apr 2015, 11:40
- Location: Sydney
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Re: Hello I am Colin from Canada
Hi Colin,
Welcome to the forum, I see you have an issue with the definition of the 662 keV peak. I have occasionally seen split peaks caused by voltage drift when a recording is done from a cold start. Make sure you allow your HV power supply to warm up and stabilize before starting the recording. Using a well detector you also need to watch the count rate, if you insert a hot source into a well detector, the count rate could easily exceed the sound card capacity to read the pulses. As a general rule 48 kHz sampling can handle about 1000 cps (without dropping too many pulses) and 96 kHz roughly double that rate.
Try warming up the the HV supply and moving the source further away and see if you still get a double peak.
Steven
Welcome to the forum, I see you have an issue with the definition of the 662 keV peak. I have occasionally seen split peaks caused by voltage drift when a recording is done from a cold start. Make sure you allow your HV power supply to warm up and stabilize before starting the recording. Using a well detector you also need to watch the count rate, if you insert a hot source into a well detector, the count rate could easily exceed the sound card capacity to read the pulses. As a general rule 48 kHz sampling can handle about 1000 cps (without dropping too many pulses) and 96 kHz roughly double that rate.
Try warming up the the HV supply and moving the source further away and see if you still get a double peak.
Steven
Steven Sesselmann | Sydney | Australia | https://gammaspectacular.com | https://beejewel.com.au | https://www.researchgate.net/profile/Steven-Sesselmann
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