SrI2(Eu) detectors

Scintillation crystals, PMTs, voltage dividers etc...
Mike S
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Re: SrI2(Eu) detectors

Post by Mike S » 07 Aug 2022, 16:00

Rob,

Thanks for sharing your thoughts and experience. This is great info that really helps.

Mike S.
Mike Sullivan
Central Coast of California, USA

Mike S
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Re: SrI2(Eu) detectors

Post by Mike S » 10 Aug 2022, 10:30

I ordered a 14x14x25mm SrI2(Eu) detector yesterday. They were testing it today. Hopefully I'll have it by the weekend. Thanks again for the info.

--Mike
Mike Sullivan
Central Coast of California, USA

Mike S
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Re: SrI2(Eu) detectors

Post by Mike S » 19 Nov 2022, 15:44

Rob,

If you have the time and inclination, could you post a few of the spectrum.csv files that you have saved in CapeSym MCA?

I'd like to import a spectrum into their software so I can try it out with real data. I don't have their MCA so I can't generate my own spectrum and I don't know the particulars of their .csv formatting to cobble up a file the software will import.

Mike S.
Mike Sullivan
Central Coast of California, USA

Rob Tayloe
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Re: SrI2(Eu) detectors

Post by Rob Tayloe » 20 Nov 2022, 09:18

I am uploading a zipfile called SrI-MCA. In this zipfile are jpg and csv format spectra of the following -
Lu176, radium watch, ThO2, Na22, and Cs137
The detector used was a 14x14x25 mm SrI(Eu) detector coupled to the MCA from CapeSym.
The CapeSym software with a Windows 10 laptop was used.

zipfile below
SrI-MCA.zip
(316.13 KiB) Downloaded 74 times
Cs-137 below
sc-mp-mca-010617-cs137-001.jpg
sc-mp-mca-010617-cs137-001.jpg (89.26 KiB) Viewed 1350 times
Lu-176 below
sc-mp-mca-010617-lu176-001.jpg
sc-mp-mca-010617-lu176-001.jpg (88.71 KiB) Viewed 1350 times
Na-22 below
sc-mp-mca-010617-na22-001.jpg
sc-mp-mca-010617-na22-001.jpg (96.82 KiB) Viewed 1350 times
radium watch below
sc-mp-mca-010617-radium-watch-001.jpg
sc-mp-mca-010617-radium-watch-001.jpg (87.47 KiB) Viewed 1350 times
ThO2 below
sc-mp-mca-010617-ThO2-001.jpg
sc-mp-mca-010617-ThO2-001.jpg (91.09 KiB) Viewed 1350 times

Rob Tayloe
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Re: SrI2(Eu) detectors

Post by Rob Tayloe » 20 Nov 2022, 09:39

The Interspec software (free download from Sandia National Labs) may also be of interest. Link to software below -
https://sandialabs.github.io/InterSpec/releases/
https://github.com/sandialabs/InterSpec

Below is an image of the spectra from the CapeSym MCA software csv files imported into (using the open file option) Interspec. Spectra are shown for Lu-176, Cs-137, and Na-22
interspec01.jpg

Mike S
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Re: SrI2(Eu) detectors

Post by Mike S » 21 Nov 2022, 07:54

Rob,

My previous response to say "Thank You" must have gotten lost in the ether, so I try again:

Thank you for the files, they are very helpful. Those are nice spectra.

I have the same detector and my initial testing has made it clear that for the low activity samples requiring long runs, I'm going to need temperature compensation. The CapeSyn MCA provides ease of implementation, but the cost and my concern about being locked into their software have me exploring other options before going that route.

Mike S.
Mike Sullivan
Central Coast of California, USA

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Sesselmann
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Re: SrI2(Eu) detectors

Post by Sesselmann » 22 Nov 2022, 15:40

Rob,

Thanks for posting, those are nice looking spectra.

What software/hardware are you using to record these ?

Steven

Rob Tayloe
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Re: SrI2(Eu) detectors

Post by Rob Tayloe » 24 Nov 2022, 11:55

The images shown above (not the Interspec image) were made using the software supplied by CapeScint for use with their detector-SiPM-MCA device. The software has been evolving. I don't recall which version was used to make the above images. Earlier versions lacked the ability to show spectra other than with a linear scale. Subsequent versions added a log display and some other features, including temperature stabilization. The software is very easy to use and save spectra. The csv format files can be directly imported into Interspec, a spreadsheet, or using a "roll-your-own" program.

https://capescint.com/
https://capesym.com/sri2.html

https://capescint.com/product-category/ ... on-probes/

https://capescint.com/wp-content/upload ... asheet.pdf
Home-CapeScint.gif
Home-CapeScint.gif (8.69 MiB) Viewed 1330 times

Rob Tayloe
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Re: SrI2(Eu) detectors

Post by Rob Tayloe » 05 Feb 2023, 02:24

If one wishes to use a CapeScint scintillator detector with SiPM (without the attached MCA) with a PicoScope digital oscilloscope (e.g. model 4262 or 2204) spectroscopy results can be obtained with software from Maximus Energy. Earlier versions of this software could be downloaded from the Maximus Energy website. I have noticed that Max is now selling his latest version of this software for a bit less than $100 USD. The manual for the software can be freely downloaded; it appears to be improved from earlier versions. His Pulse Counter software can be purchased via ebay or from his website -

https://maximus.energy/index.php/product/pulsecounter/

I have also used the various CapeScint scintillation detectors with SiPM with the Red Pitaya device and the free MCAPHA software.

https://redpitaya.com/stemlab-125-14/

Rob Tayloe
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Re: SrI2(Eu) detectors

Post by Rob Tayloe » 05 Feb 2023, 03:20

Following are some results that I obtained using the Red Pitaya 125-14 device and using the MCA-PHA software. The results were saved as an ASCII text file and subsequently imported into a spreadsheet. The figures below are from the spreadsheet. The x-axis is not energy, rather it is just "bins".

The CapeScint detectors all were 14x14x25 mm using a SiPM. The detectors were powered using three 9 volt batteries connected in series. A 50 ohm terminator resistor was used. The detectors were all encased in a plastic box as shown earlier in this thread.

Links to the CapeScint detector datasheets are below -

https://capescint.com/wp-content/upload ... asheet.pdf

https://capescint.com/wp-content/upload ... asheet.pdf

https://capescint.com/wp-content/upload ... asheet.pdf

https://capescint.com/wp-content/upload ... asheet.pdf

The CapeScint website where one may order these detectors is -
https://capescint.com/product-category/ ... ssemblies/

The detector hookup with the Red Pitaya 125-14 is as shown in this thread (see page 3) -

viewtopic.php?f=15&t=851&start=20

sri-th.jpg
sri-th.jpg (89.63 KiB) Viewed 1256 times
nel-th.jpg
nel-th.jpg (74.13 KiB) Viewed 1256 times
nai-th.jpg
nai-th.jpg (84.65 KiB) Viewed 1256 times
csi-th.jpg
csi-th.jpg (86.2 KiB) Viewed 1256 times

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