开云体育

So dumb question. Why does increasing peak time increase counts?

This next scan is same U L X-Rays being analyzed @ 19.2us peaking time, from a scan only 41 minutes long.

Charles, have you looked at the multiple .mca files in the first post of this thread? You can load 10 of them by : FILE:OPEN then scroll through them. Since most of us are analyzing by eye, let your

Yes I will be happy too, or maybe already in the archives- will check. Geo To: "XRF" <[email protected]> Sent: Thursday, October 22, 2020 10:33:53 AM Subject: Re: [XRF] Si-PIN Detector PEAKING-TIME-TEST

Geo, Doubling the # channels gives you better definition as well. Could you do a test with 2048 channels and 4.8 uS peak time? If you provide both mca files they could be compared. Charles

First real run with a longer peaking time, nearly everything else the same. This is U L X-Rays, one of my current interests. To my eye, the peaks are taller for the same test-time and maybe a little

FYI- All the ones being used here are factory matched DP5-PC5-Si-PIN. These are made from the OEM kits. Geo To: [email protected] Sent: Wednesday, October 21, 2020 12:04:38 PM Subject: Re: [XRF] Xrf

Short peaking times are used for high count rates and with Pile up rejection and you trade off resolution for count rate. A longer peaking time is used for low count rates for better resolution but

Mike- maybe try turn then button around, make Gamma Scan of the back, look for elements in button if metal not too thick?. Geo To: [email protected] Sent: Wednesday, October 21, 2020 11:26:56 AM Subject:

Charles, I tried a magnet on one of my Am241 buttons.? It was weakly magnetic.? Assuming it is Stainless Steel, this points to an Austenitic class (like 304 or 316) and that means it has both Cr and

8 X Am ring. Mike. Somewhere have the .mca from Nevada where a tube was used, it must be on old computer or HD backup. Will post it if found. Geo To: [email protected] Sent: Wednesday, October 21, 2020

Charles?YesScanning through ?bottle .Can easily scan again later with ?some?capsules in plastic wrappingTaray

Geo, What were you using for excitation? Mike L.

Thanks, Geo. This is a good example of why it is important to have enough counts. The one with 200+ counts shows a clear Ni peak. The one with a count of 100 is showing signs of Ni but without a

I'm using the same peaking time. El El mié, oct. 21, 2020 a la(s) 7:14 a. m., <GEOelectronics@...> escribió:

" Are you scanning through the bottle? Colored plastics will have Br, which will be hard to differentiate from Se at 1024 channels. If I need to raise a sample up to center it on the detector I use a

Charles, what is your peaking time? I've been using 4.8 us but may change it to slightly slower to get rid of all noise on far left. Geo To: "XRF" <[email protected]> Sent: Wednesday, October 21, 2020

Charles?Using about 9 Am 241 According to Moseley’s law,this sample is mainly iron? With such a prominent log scale iron peak,unlikely to miss out nickel in a quick scan Taray

.mca of my small Fe-Ni? and the one that to the eye is "stone" Geo

Yeah, there is a lot more going on that just Se. Let it run about 10x longer and post the mca. Are you scanning through the bottle? Colored plastics will have Br, which will be hard to differentiate