Search found 126 matches

by Svilen
25 May 2020, 19:24
Forum: Spectrum
Topic: Trinitite – The Quest for Europium and More: A 17 Day Gamma Spectrum
Replies: 22
Views: 3025

Re: Trinitite – The Quest for Europium and More: A 17 Day Gamma Spectrum

You are the king of the long measurements (and patience), Massimo!
Maybe you can this way determine the optimal test period for these samples in your conditions, a good balance between time and result quality ;)
by Svilen
22 May 2020, 18:28
Forum: Spectrum
Topic: Alphaspec of Ra226
Replies: 7
Views: 496

Re: Alphaspec of Ra226

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

Regards,
by Svilen
20 May 2020, 20:24
Forum: Spectrum
Topic: Autunite from Nevada
Replies: 6
Views: 638

Re: Autunite from Nevada

Nice study and interesting to know, Massimo. I also thought the XRF contribution is greater.

Greetings,
by Svilen
20 May 2020, 19:02
Forum: Spectrum
Topic: Alphaspec of Ra226
Replies: 7
Views: 496

Re: Alphaspec of Ra226

Great Job indeed. What do you use to drive these detectors?
by Svilen
13 May 2020, 18:51
Forum: Spectrum
Topic: Autunite from Nevada
Replies: 6
Views: 638

Re: Autunite from Nevada

Hi Massimo,
Thank you for sharing this measurement. You may have also Bi-214 at 935keV visible, but you said you want to leave the other bumps unlabeled, so you may have a reason. Is the unlabeled bump before Bi-214 at 609keV from Compton interactions?

Greetings,
by Svilen
09 May 2020, 22:07
Forum: Detector drivers
Topic: DIY GM Environmental Radiation Monitor
Replies: 10
Views: 1458

Re: DIY GM Environmental Radiation Monitor

Hi Pavel, Thank you for your reply. I would also like to congratulate you for your intelligent posts. This DIY geiger kit seems really well made and works very well with the Arduino indeed. You may be interested in this tube here (I bet you can negotiate the price ~10Eur lower and then you'll have a...
by Svilen
09 May 2020, 07:28
Forum: Detector drivers
Topic: DIY GM Environmental Radiation Monitor
Replies: 10
Views: 1458

DIY GM Environmental Radiation Monitor - UPDATE

Since the old DS1307 real time clock (RTC) is inaccurate and significantly affected by ambient temperature changes, I replaced the SD card shield with a separate RTC DS3231 and SD card modules. The DS3231 is very accurate and features a temperature-compensated crystal oscillator. The SD card module ...
by Svilen
08 May 2020, 03:44
Forum: Detectors
Topic: Voltage divider for Scionix 38B57
Replies: 6
Views: 729

Re: Voltage divider for Scionix 38B57

Tom is surely competent and have lot's of experience with these detectors, so you may try this too. I personally don't know what is the benefit from increasing the resistance, it just increases the noise too. This will reduce the current drawn and may be good for battery powered portable setups, but...
by Svilen
08 May 2020, 03:28
Forum: Introductions >> Start Here !
Topic: Hello from Connecticut, USA
Replies: 3
Views: 559

Re: Hello from Connecticut, USA

Welcome once again, Andrey! Thank you for following the rules and introducing yourself here. Great that you also have this interesting blog, I'm just going to read about the diffusion cloud chamber you show there ;)
by Svilen
07 May 2020, 19:01
Forum: Detectors
Topic: Voltage divider for Scionix 38B57
Replies: 6
Views: 729

Re: Voltage divider for Scionix 38B57

Zdravey Andrey :) Welcome to the forum, I'm glad that the bulgarian presence here grows :) Please, add your real name and location in your signature (or in the proper place from the user control panel) and introduce yourself shortly in the "Introductions" section, since the forum rules require it. A...