Yttrium ore scan in the low gain mode showing the obvious abundance of Y.

Same sample as first post, same scan and data, but with the gain turned up to bring up lesser, but still interesting peak-pairs.

Now we can pick out Ce and Nd pretty easily and with some detective work,, possibly smaller quantities of? La, Ca and Ni.

Have fun

Geo>K0FF

Y_Ore_With_Ce_Nd.png

#70

开云体育

Try putting the plot for the Y scale in log space, it should ?help sort out the big from the small.? What was your live time and beam current on this shot? ?

Dud

?

Show quoted text

From: [email protected] [mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Friday, October 4, 2019 1:09 PM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF

?

Same sample as first post, same scan and data, but with the gain turned up to bring up lesser, but still interesting peak-pairs.
Geo,

Now we can pick out Ce and Nd pretty easily and with some detective work,, possibly smaller quantities of? La, Ca and Ni.

Have fun

Geo>K0FF

#71

开云体育

You’ll also need a micro focus xray source to put on that bill as well.

Dud

?

Show quoted text

From: [email protected] [mailto:[email protected]] On Behalf Of Charles David Young
Sent: Friday, October 4, 2019 2:33 PM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF

?

I got a quote from Amptek that the detector is only $4000 but the power supply and preamp is another $6000.? If you know what to look for on ebay the system can be had for less, of course.

?

Charles

?

On Fri, Oct 4, 2019 at 1:57 PM David Eckhardt <davearea51a@...> wrote:

So, Geo, where and how much (is it even affordable to the amateur??) can we procure this 'magic' XRF detector??? The resolution is superb, especially next to the RAP-47 or anything else I have.?

?

Dave - W?LEV

?

Virus-free.

?

On Fri, Oct 4, 2019 at 7:48 PM <GEOelectronics@...> wrote:

Yttrium ore scan in the low gain mode showing the obvious abundance of Y.

--

Dave - W?LEV

Just Let Darwin Work

Just Think

#72

开云体育

Beam current = 0.0 uA (8 pellet SDD CAP was excitation source).
Time - 3600 seconds.

Many other runs were done on same rock, with different times, excitation source and probes.

These are the setup parameters for the run shown:

RESC=?; Reset Configuration
CLCK=80; 20MHz/80MHz
TPEA=11.200; Peaking Time
GAIF=1.1064; Fine Gain
GAIN=19.663; Total Gain (Analog * Fine)
RESL=3276; Detector Reset Lockout
TFLA=0.400; Flat Top
TPFA=100; Fast Channel Peaking Time
PURE=ON; PUR Interval On/Off
RTDE=OFF; RTD On/Off
MCAS=NORM; MCA Source
MCAC=1024; MCA/MCS Channels
SOFF=OFF; Set Spectrum Offset
AINP=POS; Analog Input Pos/Neg
INOF=DEF; Input Offset
GAIA=10; Analog Gain Index
CUSP=0; Non-Trapezoidal Shaping
PDMD=NORM; Peak Detect Mode (Min/Max)
THSL=2.978; Slow Threshold
TLLD=OFF; LLD Threshold
THFA=8.06; Fast Threshold
DACO=OFF; DAC Output
DACF=0; DAC Offset
RTDS=0; RTD Sensitivity
RTDT=0.00; RTD Threshold
BLRM=1; BLR Mode
BLRD=3; BLR Down Correction
BLRU=0; BLR Up Correction
GATE=OFF; Gate Control
AUO1=ICR; AUX_OUT Selection
PRET=3600.0; Preset Time
PRER=OFF; Preset Real Time
PREC=OFF; Preset Counts
PRCL=0; Preset Counts Low Threshold
PRCH=0; Preset Counts High Threshold
HVSE=-135; HV Set
TECS=225; TEC Set
PAPS=ON; Preamp 8.5/5 (N/A)
SCOE=RI; Scope Trigger Edge
SCOT=87; Scope Trigger Position
SCOG=1; Digital Scope Gain
MCSL=0; MCS Low Threshold
MCSH=0; MCS High Threshold
MCST=0.00; MCS Timebase
AUO2=ICR; AUX_OUT2 Selection
TPMO=OFF; Test Pulser On/Off
GPED=FA; G.P. Counter Edge
GPIN=AUX1; G.P. Counter Input
GPME=OFF; G.P. Counter Uses MCA_EN?
GPGA=OFF; G.P. Counter Uses GATE?
GPMC=OFF; G.P. Counter Cleared With MCA Counters?
MCAE=OFF; MCA/MCS Enable
BOOT=ON; Turn Supplies On/Off At Power Up

?

Show quoted text

On 2019/10/04 06:41 PM, Dude wrote:

Try putting the plot for the Y scale in log space, it should ?help sort out the big from the small.? What was your live time and beam current on this shot? ?

Dud

?

From: [email protected] [mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Friday, October 4, 2019 1:09 PM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF

?

Same sample as first post, same scan and data, but with the gain turned up to bring up lesser, but still interesting peak-pairs.
Geo,

Now we can pick out Ce and Nd pretty easily and with some detective work,, possibly smaller quantities of? La, Ca and Ni.

Have fun

Geo>K0FF

?

#73

Same rock and probe, different exciter- this time Kevex microfocus tube set for 50 kVp @ 10 uA, for 150 s.
The beam was filtered with aluminum.

Look at the max peak count of this compared to the? radioisotope excited in the first pic in this topic!

Y-Ore-150s-50kVp-10uA.png

#75

开云体育

That would explain the last peak at 59

Dud

?

Show quoted text

From: [email protected] [mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Friday, October 4, 2019 5:15 PM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF

?

Beam current = 0.0 uA (8 pellet SDD CAP was excitation source).
Time - 3600 seconds.

Many other runs were done on same rock, with different times, excitation source and probes.

These are the setup parameters for the run shown:

RESC=?; Reset Configuration
CLCK=80; 20MHz/80MHz
TPEA=11.200; Peaking Time
GAIF=1.1064; Fine Gain
GAIN=19.663; Total Gain (Analog * Fine)
RESL=3276; Detector Reset Lockout
TFLA=0.400; Flat Top
TPFA=100; Fast Channel Peaking Time
PURE=ON; PUR Interval On/Off
RTDE=OFF; RTD On/Off
MCAS=NORM; MCA Source
MCAC=1024; MCA/MCS Channels
SOFF=OFF; Set Spectrum Offset
AINP=POS; Analog Input Pos/Neg
INOF=DEF; Input Offset
GAIA=10; Analog Gain Index
CUSP=0; Non-Trapezoidal Shaping
PDMD=NORM; Peak Detect Mode (Min/Max)
THSL=2.978; Slow Threshold
TLLD=OFF; LLD Threshold
THFA=8.06; Fast Threshold
DACO=OFF; DAC Output
DACF=0; DAC Offset
RTDS=0; RTD Sensitivity
RTDT=0.00; RTD Threshold
BLRM=1; BLR Mode
BLRD=3; BLR Down Correction
BLRU=0; BLR Up Correction
GATE=OFF; Gate Control
AUO1=ICR; AUX_OUT Selection
PRET=3600.0; Preset Time
PRER=OFF; Preset Real Time
PREC=OFF; Preset Counts
PRCL=0; Preset Counts Low Threshold
PRCH=0; Preset Counts High Threshold
HVSE=-135; HV Set
TECS=225; TEC Set
PAPS=ON; Preamp 8.5/5 (N/A)
SCOE=RI; Scope Trigger Edge
SCOT=87; Scope Trigger Position
SCOG=1; Digital Scope Gain
MCSL=0; MCS Low Threshold
MCSH=0; MCS High Threshold
MCST=0.00; MCS Timebase
AUO2=ICR; AUX_OUT2 Selection
TPMO=OFF; Test Pulser On/Off
GPED=FA; G.P. Counter Edge
GPIN=AUX1; G.P. Counter Input
GPME=OFF; G.P. Counter Uses MCA_EN?
GPGA=OFF; G.P. Counter Uses GATE?
GPMC=OFF; G.P. Counter Cleared With MCA Counters?
MCAE=OFF; MCA/MCS Enable
BOOT=ON; Turn Supplies On/Off At Power Up

?

On 2019/10/04 06:41 PM, Dude wrote:

Try putting the plot for the Y scale in log space, it should ?help sort out the big from the small.? What was your live time and beam current on this shot? ?

Dud

?

From: [email protected] [mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Friday, October 4, 2019 1:09 PM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF

?

Same sample as first post, same scan and data, but with the gain turned up to bring up lesser, but still interesting peak-pairs.
Geo,

Now we can pick out Ce and Nd pretty easily and with some detective work,, possibly smaller quantities of? La, Ca and Ni.

Have fun

Geo>K0FF

?

#76

Yes it does explain the @59.5. These scans were made in Feb 2014. Since then I've learned to set the gain and now the whole screen only shows 0-45 keV.

That won't cover the all R.E.'s K shell X-Rays but about halfway through the Lanthanides, you are switching to L shell identification, and eventually L and M shell anyway.

Geo

#77

开云体育

Geo,

You can still get a Sm K if its concentrated so I set the upper to 50. ?I relooked at some of the shots we did in Las Vegas but the file only reas a .X.MCA. Do you have the notes from what these shots were? The only one labeled was the Harding. Also the Calibrate and Analyze function works on my version and will id the peaks after? you do a peak search. I forgot how nice that Amptek program is.

Dud

?

Show quoted text

From: [email protected] [mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Saturday, October 5, 2019 10:32 AM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF

?

Yes it does explain the @59.5. These scans were made in Feb 2014. Since then I've learned to set the gain and now the whole screen only shows 0-45 keV.

That won't cover the all R.E.'s K shell X-Rays but about halfway through the Lanthanides, you are switching to L shell identification, and eventually L and M shell anyway.

Geo

#78

开云体育

Yes I have all the data on its own little notebook computer now, and also have some photos of the setup. There were at times 3 MCAs running at one time, in the same setup, each with a different probe,

Do you have DppMCA running? It is freeware on AMPTEK site, and seems to be the
same version as we used in '14.

The data files can be emailed? to you, no problem I would appreciate your input. Do you still have the report? If not I do still, in a MS-WORD document.

?

Show quoted text

On 2019/10/05 01:11 PM, Dude wrote:

Geo,

You can still get a Sm K if its concentrated so I set the upper to 50. ?I relooked at some of the shots we did in Las Vegas but the file only reas a .X.MCA. Do you have the notes from what these shots were? The only one labeled was the Harding. Also the Calibrate and Analyze function works on my version and will id the peaks after? you do a peak search. I forgot how nice that Amptek program is.

Dud

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of GEOelectronics@...
Sent: Saturday, October 5, 2019 10:32 AM
To: [email protected]
Subject: Re: [XRF] Yttrium Ore XRF

?

Yes it does explain the @59.5. These scans were made in Feb 2014. Since then I've learned to set the gain and now the whole screen only shows 0-45 keV.

That won't cover the all R.E.'s K shell X-Rays but about halfway through the Lanthanides, you are switching to L shell identification, and eventually L and M shell anyway.

Geo

?