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Thanks Steve. That slide and your explanation is most useful. Dud Sent: Monday, January 20, 2020 6:02 PM To: [email protected] Subject: Re: [XRF] XRF - comparing Dud's with my Si-PIN Hey Dud, it is due to

OMG! Dud Sent: Monday, January 20, 2020 6:14 PM To: [email protected] Cc: Mike Loughlin; Steve Dubyk Subject: Re: [XRF] White Signal bassetite Here it is again.

Here it is again.

Hey Dud, it is due to the ionic radius and crystal structure that this occurs. Monazite is monoclinic and incorporates the LHEE, xenotime is tetragonal and incorporates the HREE; both are phosphates.

Send the mca file Dud Sent: Monday, January 20, 2020 2:22 PM To: [email protected]; Mike Loughlin; Steve Dubyk Subject: [XRF] White Signal bassetite This is a scan that ran for 1 1/2 days using Am241 to

charlesdavidyoung@...> wrote:

Sorry I forgot the .mca. I'll send it in a bit. charlesdavidyoung@...> escribió:

This is a scan that ran for 1 1/2 days using Am241 to excite. It has a lot of stuff in it and I will need everybody's help to interpret it (i.e. Dud). One complicating factor is that even with the

This is the little portable exciter. It is a mini-X-Ray tube made by Kevex, controlled by a LIXI power supply. When coupled with the LIXI X-Ray Intensifier Viewer, it used as a C-Arm, to take

Thanks for the detailed analysis Dudley!George

Sent: Sunday, January 19, 2020 11:19 AM To: [email protected] Subject: [XRF] Currency XRF Quiz Here’s Geo’s 1958 copper nickel in log space. What do we have here? Anyone?, anyone? Beuller?... Beuller?

Steve, I don't understand everything you said but are any of my cyrtolites examples of this? Charles El El sáb, ene. 18, 2020 a la(s) 10:09 p. m., Dude <dfemer@...> escribió:

A dirty old nickel that was in the bottom of an ammo box?

I am not at my computer today but I would imagine Ka1 Ka2 Kb1 Charles

Here’s Geo’s 1958 copper nickel in log space. What do we have here? Anyone?, anyone? Beuller?... Beuller? Dud Sent: Sunday, January 19, 2020 9:00 AM To: [email protected] Subject: Re: [XRF] Currency

Yes I used collimator, filters and shielding. Pictures exist of all and will be posted as I flesh out the topics. I did these currency scans 6 years ago in my portable radlab in NV, and not really

See the info bar on the right- 300 seconds accumulated (live) time. Real time (clock time)= ~600 seconds due to deadtime. 10 microamps is about as low as one of these tubes can be adjusted to. I

Charles , He asked for 300 secs of live time which required 623 secs of real time due to high count rate pile up . The count rate was way too high with a dead time of 46%. Dead time should be kept

How long does it take to get those kind of counts? El El dom, ene. 19, 2020 a la(s) 9:59 a. m., <GEOelectronics@...> escribió:

1958_Cu-Ni-Jefferson_Nickel-SDD-50kVp_10uA