Those peaks are very small and not well shaped. They come from leakage and backscatter from the elements that make up the exciter head. I made it from brass (copper and zinc peaks), there is iron and chromium in the little buttons themselves (stainless steel) and of course lead in the back shield of the exciter. If you look really close, sometimes you can pick out a palladium peak as wel, but the 59 and Np X-R%ays predominate the interference patterns.
Geo
----- Original Message -----
From: Dude <dfemer@...>
To:
[email protected]Sent: Sat, 11 Jan 2020 12:39:59 -0500 (EST)
Subject: Re: [XRF] Silicon XRF
Why is the ROI 6.05 to 6.45? it should bracket the Fe Ka.
I¡¯d watch the temp and see if that drifts which could introduce
noise.
Dud.
?
?
The
peak search shows FWHM @ Iron Ka as 0.145? = 145 eV? Right on specs
for this sensor.
I
got it cheap because it was new, warranty return complaint was "Not stable
and FWHM @ 5.9 keV only 175 eV"
Start
?? End????? FWHM?
6.05??? 6.45?????
0.145?????
-----
Original Message -----
From: Dude <dfemer@...>???? 104 137
To: [email protected]
Sent: Fri, 10 Jan 2020 22:19:16 -0500 (EST)
Subject: Re: [XRF] Silicon XRF
margin: 0.0in;
font-size: 12.0pt;
font-family: "Times New Roman" , serif;
}
a:link, span.MsoHyperlink {
color: blue;
text-decoration: underline;
}
a:visited, span.MsoHyperlinkFollowed {
color: purple;
text-decoration: underline;
}
p {
margin-right: 0.0in;
margin-left: 0.0in;
font-size: 12.0pt;
font-family: "Times New Roman" , serif;
}
span.EmailStyle18 {
font-family: Calibri , sans-serif;
color: black;
}
*.MsoChpDefault {
font-size: 10.0pt;
}
div.Section1 {
page: Section1;
}
/*]]>*/
Run a
longer count to smooth it up a bit.?
?
?
Will
see if it tells me FWHM tomorrow Dud.?
-----
Original Message -----
From: Dude <dfemer@...>
To: [email protected]
Sent: Fri, 10 Jan 2020 21:23:55 -0500 (EST)
Subject: Re: [XRF] Silicon XRF
margin: 0.0in;
font-size: 12.0pt;
font-family: "Times New Roman" , serif;
}
a:link, span.MsoHyperlink {
color: blue;
text-decoration: underline;
}
a:visited, span.MsoHyperlinkFollowed {
color: purple;
text-decoration: underline;
}
p {
margin-right: 0.0in;
margin-left: 0.0in;
font-size: 12.0pt;
font-family: "Times New Roman" , serif;
}
span.EmailStyle18 {
font-family: Calibri , sans-serif;
color: black;
}
*.MsoChpDefault {
font-size: 10.0pt;
}
div.Section1 {
page: Section1;
}
/*]]>*/
Nice.
What¡¯s the FWHM?
Dud
?
?
A nice peak from pure silicon, the sample is 1 3/4"
diameter slice of pure silicon, grown as a single crystal, in long bars.Small
by today's standards.
XRF via Am_X8 exciter, SSD detector, 30 minutes.
Geo
