Alphaspec of Ra226

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Peter-1
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Alphaspec of Ra226

Post by Peter-1 » 19 May 2020, 01:33

I made a first attempt to record the alpha spectrum of Ra226. I did some experiments with my old semiconductor detectors for radiation. These detectors were offered by Siemens for a short time and were available in small quantities. The measurements should actually be made in a vacuum, but that was too time-consuming for the first attempt. Old clock hands covered with radium fluorescent paint served as the source. For comparison, i took the spectrum of a graphic of a measurement for a university publication. The measurement was made with the SFH 521 with 1cm².
Alpha-01.jpg
Alpha-01.jpg (93.18 KiB) Viewed 168 times
Alpha-02.jpg
Alpha-02.jpg (82.99 KiB) Viewed 168 times
Alpha-03.jpg
Alpha-03.jpg (33.8 KiB) Viewed 168 times
Peter

Mike S
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Re: Alphaspec of Ra226

Post by Mike S » 20 May 2020, 12:08

This is really nice work!

Mike S.
Mike Sullivan
Central Coast of California, USA

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Svilen
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Re: Alphaspec of Ra226

Post by Svilen » 20 May 2020, 19:02

Great Job indeed. What do you use to drive these detectors?
Svilen

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Peter-1
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Re: Alphaspec of Ra226

Post by Peter-1 » 22 May 2020, 01:33

hello Svilen,

The detector is operated with a voltage of 20 volts and has a very sensitive amplifier. This amplifier is DIY and after the first stage has a main amplifier with 1000x to 10,000x gain. I want to increase the voltage to 120 volts in the near future. Maybe the two pictures and texts help a little.
Daten-01.jpg
Daten-02.jpg
Greetings Peter

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Steven Sesselmann
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Re: Alphaspec of Ra226

Post by Steven Sesselmann » 22 May 2020, 09:56

Peter,

Nice work, did you have the source directly in contact with the detector, if not what was the distance?

Steven

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Svilen
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Re: Alphaspec of Ra226

Post by Svilen » 22 May 2020, 18:28

Thank you Peter, now it is clear. Bad that they are not available anymore, I would enjoy getting one :)

Regards,
Svilen

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Peter-1
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Re: Alphaspec of Ra226

Post by Peter-1 » 22 May 2020, 18:56

hello Steven,

the distance was about 5mm between the surface of the detector and the source, i.e. the clock hand. I am very careful not to touch or destroy the surface of the detector.
Peter

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Go-Figure
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Re: Alphaspec of Ra226

Post by Go-Figure » 24 May 2020, 18:36

This is really something Peter,
Alpha spectroscopy is something that's been in the back of my mind for a while now, thank you for this post.

Massimo

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