开云体育

Radon instrument comparison

Dude All Messages By This Member #110 开云体育 Attached is a comparison between the Smart CAM and a Niton (Durridge) RAD 7. It will be interesting to see Geo’s FemtoTech data. Note that the CAM integrates the readings over a period of time which can be set in the software. I used 60 sec for the short acute and 140 for the chronic long. The default was 240 long and 140 short. I was more interested is fast response. The Po-218 needs to get to equilibrium which takes about 30 min. I used a flow rate of 1.13 cfm (32 lpm) which is about what was recommended on the CAM. The RAD 7 is very slow in the 100ml range I believe. There are some setting in the CAM that are not well explained. In order to get a radon reading without an exponent of E-17 go into the Channels Options and change the lifetime to 186 which is the half life of Po-218. Why that was set at E-17 was wrong Under channels tab you can check the Show differential and Integral which displays a RADON acute or Chronic in pCi/ml and a pCih/ml which was always zero so far. If you turn off the 2 check marks the display for radon is just RADON pCi/ml. If you check activity (differential is auto checked) it displays RADON in pCi/ml and pCi (activity). It would be nice if they had a way to use l rather than ml but, hey, what’s 3 orders of magnitude anyhow. I’m working on getting a price and supplier of the filter cards. We can do a group deal if anyone is interested. Dud ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Geo Dowell Sent: Friday, May 27, 2022 1:46 PM To: [email protected] Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers to background info on this topic ? THANKS Dud, great to know. Once I get it lined out, I'll start comparing to the Femtotech. ? how on earth did you figure that, was it in the manual? ? Geo ? toggle quoted message Show quoted text ----- Original Message ----- From: Dude <dfemer@...> To: [email protected] Sent: Fri, 27 May 2022 14:36:57 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers to background info on this topic ? Geo/Nick To convert the wacko ?E-17 radon reading go to command mode with the Key get to the Radon tab and change the 1e-16 to 186 which is the Po218 half life.. Bring up the Radon Acute default page to read Po 218 acute and Radon Acute. It will be in pCi/ml multiply by 1000 to get pCi/l. ?I need to use Radon raw and Po raw but I still need to figure out how to do that. I’m running the RAD 7and the SmartCAM together and the CAM showing 3.5 pCi/l ?while The RAD 7 is averaging 4.0 pCi/l ?+- 2.1. Doing a manual calculation it always comes up low by a factor 3 or so. That ma be due to not having all their corrections in there and using acute cps Dud ? From: [email protected] [mailto:[email protected]] On Behalf Of Geo Dowell Sent: Friday, May 27, 2022 10:42 AM To: [email protected] Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers to background info on this topic ? " Geo, What kind of solid samples are going to run? One needs to be very careful not to crap up the detector. Most alpha samples are via liquid chem electro-deposited on steel disk, swipe and air sample filters. Don’t put a loose sample in there. Dud" A few different electroplated discs on the IMPEX, But other units, anything I can lay my hands on Been collecting and waiting for this phase for a long time. All new to me.? Geo ? ----- Original Message ----- From: Dude <dfemer@...> To: [email protected] Sent: Fri, 27 May 2022 13:16:02 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers to background info on this topic ? 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; } p.MsoNoSpacing, li.MsoNoSpacing, div.MsoNoSpacing { margin: 0.0in; font-size: 16.0pt; font-family: Arial , sans-serif; color: black; } span.EmailStyle19 { font-family: Arial , sans-serif; color: black; top: 0.0pt; letter-spacing: 0.0pt; font-weight: normal; font-style: normal; } .MsoChpDefault { font-size: 10.0pt; } div.Section1 { page: Section1; } /]]>/ Peter, The Smart Cam and usual Radon sampling run around 32 L/min (1 cft/min). Geo, What kind of solid samples are going to run? One needs to be very careful not to crap up the detector. Most alpha samples are via liquid chem electro-deposited on steel disk, swipe and air sample filters. Don’t put a loose sample in there. Dud ? From:* [email protected] [mailto:[email protected]] On Behalf Of Geo Dowell Sent: Friday, May 27, 2022 1:45 AM To: [email protected] Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers to background info on this topic ? P, are you interested in Alpha in air? That's fine, my intention was to do Alpha solid samples with my 6A head. ? Geo ? ? ? ----- Original Message ----- From: peter via groups.io <epkoncept@...> To: [email protected] Sent: Thu, 26 May 2022 23:54:53 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers to background info on this topic ? Need some advice. What sort of airflow does the Eberline 6A expect ? Or more useful is what sort of airflow should I use ? I don't know how make use of the airflow control circuit in the 6A so I thought I might plumb the air directly from a pump. I have an old SKC air sampler pump. It sucks, but I can also get it to pump. It goes up to 5l/min 4l/m @ 20" of back pressure. P ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Rad7CAM.xlsx Rad7CAM.xlsx

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