开云体育

Good info thanks. The Det. Temp and Det.HV are shown real time on the bottom right hand corner of the DPPMCA program- good idea to moniotor those for stability or changes. Should be stable over many

GeoThis is from Amptek troubleshooting guide? If the resolution is worse than you expect, then ...Check for good coolingIn Amptek’s thermoelectrically cooled detectors, the back of the detector is

" Tip for calibration It can be difficult to find 2 peaks at extreme end within a specimen or combination. Sometimes with this method it is difficult to identify peaks Easier way is use 2 different

Here is pic of selenium sulphide(dried centrifugal sample of selenium sulphide suspension / Selsun) using 2048 with threshold correction. The selenium peaks are seen clearly? and not hidden like the

Geo, These “peaks” look to be counting noise. The difference between Kb1 and Kb2 is just 0.013 while the peak difference is 0.08 keV Dud Sent: Saturday, October 24, 2020 6:15 AM To:

There is quite a big mass difference between a piece of DU and the little amount Pu decay in the Trinitite. There can also be a big difference in detector efficiencies. Dud Sent: Friday, October 23,

Again no problem. Lowering your max energy to 62 like I do will give more precisi8on per channel. Nothing above 60 will register normally anyway. Just keep it high enough to see 59.5 for calibration

Made a Math mistakeIt’s 0.04 not 4At least now I know the relevance of this channel settings?I was taken off guard?I actually did a SF threshold check after calibration?But ?din register when I

Taray, With the 2048 conversion gain your max energy is 88.76 keV so one channel is 88.76/2048 = 0.043 keV/channel. See if one right or left arrow click will give you a 0.04 energy difference. Dud

Very interesting set up thanks for sharing. You need to get rid of the low energy noise as your dead time is 100% with over 10 million noise counts. Run the fast and slow thresholds ad check your

Taray, Set cursor somewhere in middle of scan. Move 1 click left, then 1 click right of original spot. Record keV readings. Temporarily click off CAL (ICON #18) , repeat test. Record channel #'s

Taray- show me in pictures offlist or onlist OK?Geo

Charles, In the chart below, ignore the intensity%- it has no meaning in this context, but the X-Ray transition energies do. . Check out the different K lines on the chart, what you are seeing as

Anyone knows how to control the energy cursor.Each I move the rt left pc keyboard,it moves by 4 units,Abit too much ?for peaks.Centroid ?method?is ?an?alternative but not?so easyTaray

CharlesJust noticed thatNee?fast?threshold was 16Did not save it b4 posting? Taray

Using a convex mount for your buttons is very interesting. I may have to try that. Is your input rate always so high? Mine is typically in the 10 to 20 range. Have you done the Tune Slow/Fast

Taray, Thanks for the post.? I am in the process of coming up with a similar Am241 device.? It is great that you found that Nickel line with your meteorite, that is useful information also. Mike

Dud remarkably efficient source / geometry set up... I am not sure but maybe this is why.?I am using a slightly convex ludlum collimator lead disc ? 9 Am241 exciter are glued on? the outer edge?

Many Pu isotopes lead to uranium, but if one of the precursors is half-life in the millions of years, there won't be very many atoms of U being made now from those in our sample from 1945. If

Of course I agree. But given the very accurate ICP-mass spectrometer analysis of this material made by national labs, not by a youtuber, what known isotopes would cause these particular 3 X-Ray