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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

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From: "Charles David Young" <charlesdavidyoung@...>
To: "XRF" <[email protected]>
Sent: Wednesday, October 21, 2020 7:46:09 AM
Subject: Re: [XRF] Xrf meteorite

Hi Taray,

If you could let that run about 10x longer we would have enough counts to know for sure whether there is something else in addition to Fe.? I would be interested in seeing that mca file again after that.

BTW, 1024 channels is really not enough resolution for seeing everything.? I tried that for a while and it makes fast, smooth scans but I was missing a lot.? I now run 4096 channels and just wait for my largest peak to get to about 200.? BTW, I also changed my gain to 9.999x.

Charles

On Wed, Oct 21, 2020 at 5:23 AM taray singh via <sukhjez=[email protected]> wrote:

Mike

If I remember correctly,there was no change with bg.

I do not have scaler

Here is a repeat scan with si pin

Only show Fe ..no nickel

I think it gives me a feel how the core of the earth is like.

Attached is a pdf of celestial radioactivity

Taray