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Here's some background on filter cards https://mirion.s3.amazonaws.com/cms4_mirion/files/pdf/spec-sheets/doc010295e n-a_icam_fixed_filters.pdf?1579456643 A PTFE type from Milipore was $398/100 they

Geo, This was run with the IMPEX filter. When looking at alpha spectra use the linear Y as peak tail and relative size are important. Notice that your Po-214 7.68 MeV tails are over lapping the 6.0

Sounds like a plan. Thanks, found one for a good price there.Ordering now.George

Since day 1 the main radon PEAK was centered between 3 and 4 MeV. Could find no reason, changed the filter, no other changes, it corrected itself to proper MeV??????? Don't know why. Darndest thing.

Geo, Are those large tails due to using a log display or is it the Po getting embedded too deep into the filter material that is too porous for alpha spec work. What is the material and micron size?

Geo, Interesting unit but it’s technically a Working Level type instrument in that it doesn’t discriminate between Rn and Th it just counts total decay alpha energy in the air which is a WL

Maybe I should go check to see if I doi have the 1" size! Amazon. We got one next day delivery for about $130, caps are about $7-15. I think specs said 1/5hp, there was a 1/4hp in it, we installed a

Explain this a bit I don’t understand what you’re saying. Dud Sent: Tuesday, May 31, 2022 2:34 AM To: [email protected] Subject: Re: Alpha and Beta particle nuclear decay studies.

Yep those gasket punches will do fine. Wish I had a sert. Do have indiviual ones that I need but no 1"Say where's a good supplier to get a new Trane compatible AC Fan motor and all new2 AC capacitors

Under *VIEW* , *DISPLAY,* chose *LOG* and *LINE* *Drawing*. Here's a scan I can recognize. Also, photo of Rn-222 Alpha energies chart. Geo

Sweet! I want some. I am thinking that gasket punch set I bought will be nice to make a clean hole in the paper material... I'm flying up to OKC this afternoon, back Thursday. Hope to be doing more

In remote outdoor air samplers, moving filters are the norm. This allows filter changing without an operatord.to the sites. IMPEX has such a head, we don't have that, nor would I want that option. I

CRM--510 also logs temperature, relative humidity, and Barometric pressure against radon to correlate storm fronts and furnace cycling.Geo

Look up Femtotech CRM-510That's what I used to make those printed charts posted. Tracks the changes over time.It is active even if off, of course it's not recording the data.It's probably the standard

This one since the beginning has its main peal showing at just above 3.5MeVGeo

What is a CRM-510? How does it measure the radon?. I hate to say it but if it’s off and in storage it’s not sampling or measuring radon. Old last measurement maybe? Dud Sent: Monday, May 30, 2022

Geo, It seems the cal card is whatever disk you put there and set up in the cal routine. There also seems to be two set ups that the Cam is programmed for, Radon and another type of set up for other

Have any idea what the isotopes on their calibration cards is Dud? does your spectrum run at ~3500MeV? at the medium ROI> What's there as far as alpha decay? Flow rate just under 1 CFM. Time- don't

Geo, to monitor for Thoron set up the top window for Po-212 Acute and use a short time window. You could also look at the raw cps Dud Sent: Monday, May 30, 2022 1:40 PM To: