Search found 41 matches

by cicastol
01 Jul 2019, 02:49
Forum: Detector drivers
Topic: USB external sound cards
Replies: 8
Views: 419

Re: USB external sound cards

By default the board connects via I2S and BNC to interface with digital systems. Board was running an adapter for I2S bridge to usb. On that note, PRA doesn't go past 384Khz for sampling... At least not what I see inside the audio interface menu. Only Theremino shows that it is capable of sampling ...
by cicastol
01 Jul 2019, 02:44
Forum: Detectors
Topic: Scintillation detector in vacuum bag
Replies: 4
Views: 164

Scintillation detector in vacuum bag

Hi all,
i would like to do a long term storage of my spares scintillators in a sealed vacuum bags normally used for foods , it is a safe idea for the PMT?
Thanks!
by cicastol
29 Jun 2019, 19:55
Forum: Detector drivers
Topic: USB external sound cards
Replies: 8
Views: 419

Re: USB external sound cards

I just had a go with a test benched AK5397E using a AK5397EQ evaluation board by Asahi Kasei Microdevices... It's a 32bit 768Khz 2 ch. sampling ADC for high end audio systems. WOW !! I would like to give it a try, now i'm using a "normal" 24 bit 192kHz, but my pmt out is a short 30uS pulse, so i th...
by cicastol
22 Jun 2019, 19:54
Forum: Spectrum
Topic: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion
Replies: 6
Views: 372

Re: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion

Hi Massimo, for such low level samples you need a very good lead shield, at least 5cm all around the detector IMHO ,for inside chamber dimensions bigger is better for reducing backscatter. I've made a modular lead shield made by rings that could take inside a standard 5-600cc Marinelli for 3"x3" det...
by cicastol
22 Jun 2019, 19:38
Forum: Software
Topic: Dealing with temperature drift in PRA
Replies: 6
Views: 247

Re: Dealing with temperature drift in PRA

Temperature drift is the biggest problem for long time integration, a simple workaround is a passive Thermal stabilization by means of taking mesurements in area with low thermal excursion or better using thermal insulation around lead shield . As i said before(in PRA 19.0 relase comments) the final...
by cicastol
23 May 2019, 05:19
Forum: Spectrum
Topic: Lantern Mantle (Thorium)
Replies: 3
Views: 306

Re: Lantern Mantle (Thorium)

Hi,
nice spectrum, 228Ac 1588 KeV peak is also reinforced by the double escape peak (1592KeV) .
by cicastol
19 May 2019, 06:09
Forum: Spectrum
Topic: Fukushima Soil
Replies: 22
Views: 1310

Re: Fukushima Soil

It looks like my current 6.1% res at 662 keV would have allowed me to spot Cs134's peak at 604.721 keV quite comfortably back in 2014-2015, unfortunately I am two half life times late, and maybe just one would have been enough (why didn't I came across Steven's kits a bit earlier?) but I am still h...
by cicastol
12 May 2019, 19:54
Forum: Software
Topic: Interspec - a free gamma peak analysis software
Replies: 4
Views: 435

Re: Interspec - a free gamma peak analysis software

Gary, Getting your data into Interspec is dead simple, you just export your histogram from PRA as a txt file, then drag and drop into the Interspec window, then calibrate one or two peaks and you are done. I haven't played with the dose rates or any of those features yet, but it looks most interest...
by cicastol
06 May 2019, 22:35
Forum: Spectrum
Topic: Zn-65 Spectrum Mystery
Replies: 9
Views: 555

Re: Zn-65 Spectrum Mystery

(1) Why the background data is so strange after exposure of the scintillating crystal to Zn-65 when it behaved so "normally" before exposure? (2) Does anybody know what the "mystery peak" around 500 keV is due to? If this was an artifact from a badly dialed GS-USB-PRO, bad cable or the like, wouldn...
by cicastol
08 Apr 2019, 19:25
Forum: Shielding
Topic: Testing of a Modified GS-STANDUP
Replies: 8
Views: 821

Re: Testing of a Modified GS-STANDUP

Hi Christipher, i readed later that you lined the bottom of the detector, as Steven said you need to use Cu/Sn to line the shield,not the detector, otherwise the x-rays lines disappear. Remember that lininig the shield reduce Pb Xrf but add a lot of scatter in the lower end of the spectrum. Christop...