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Messages 3247 - 3283 of 17477   Oldest  |  < Older  |  Newer >  |  Newest
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3247
Hi, Nice software, I've just started playing with it. I was looking at a PC MCA but was lucky enough to pick-up an Amptex MCA8000 and 3" scintillation probe...
Robert Atkinson
robert8rpi
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Mar 1, 2005
9:59 am
3248
It's a Gamma thing all the way around. Am-241 has a low energy Gamma, to which GM tubes over respond ( assuming they are thin enough wall for it to get inside...
Geo
K0FF
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Mar 1, 2005
3:38 pm
3249
... A: NOT a simple question, there is a LOT of confusion over this topic, and some of it is perpetuated by mistakes. I don't usually comment on Health Physics...
GEOelectronics
K0FF
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Mar 1, 2005
5:29 pm
3250
Nice catch! Be sure to share your experiments and charts with us. Geo ... Amptex ... of ... sample ... peak ... buffer ... and ... conversion ... techniques, ...
Geo
K0FF
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Mar 1, 2005
5:50 pm
3252
The katt kaught me, therefore a Korrection: In addition, remember that mR/h are only defined for gammas. It is an ionization rate unit. Also, remember mrem/h...
J. Marshall Reber
groschen1936
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Mar 1, 2005
7:34 pm
3253
Hi Seth, Have you ever taken a short cruise along River Road, in Apollo, Pa...about 30 miles N of the city? I missed the Babcox/Wilcox thread, but they had a...
Jim Markitell
jmarkitell
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Mar 2, 2005
12:58 am
3254
Po 210 emits one photon just out of the range that over excites the LND 712 tube (.804 MeV). As someone else said a gamma scintillator will just pick up the...
Chris Cavanaugh
night427
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Mar 2, 2005
1:31 am
3255
Hey there! Yeah I live 3 miles from that dump site. They burried trucks, barrels etc. in that field. My spring break is next week so I will document readings...
Seth Martin
chernobyl_87
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Mar 2, 2005
2:28 am
3256
-Chris, check the charts for the probability of that photon= .000011 not a strong contender! That is only .0011% chance of a hit. That's why I called it puny,...
Geo
K0FF
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Mar 2, 2005
5:12 am
3259
Does any one know of any safety issues with these counters ? I recently used on and wonderered where these are from over 40 years ago could the unit itself be...
sonyswradio
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Mar 2, 2005
2:28 pm
3260
Thanks Geo, still learning to use the Decay Software, great stuff! to easy to click on the particle, need to look at probabilities too. I wasn't aware that...
Chris
night427
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Mar 2, 2005
2:44 pm
3261
With any Rad Equipment it is a good idea to check for radiation other than the check source if it has been used, since it may be or have been contaminated....
Chris
night427
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Mar 2, 2005
2:51 pm
3262
Absolutely! One list member recently received a contaminated probe from eBay. Be especially wary of alpha particles as contamination. Even though they are...
Geo
K0FF
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Mar 2, 2005
7:22 pm
3263
Chris, Where are you getting Baby Bens for $10? I've never paid over $3 for any of mine, and not over $4 for Big Bens, (except for a couple of genuine antique...
kwcclark
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Mar 2, 2005
8:53 pm
3264
I am speaking in terms of eBay prices. I just got a GE Telechron at a thrift store for .42 cents (lots of radium and luminous material, not blazingly hot,...
Chris Cavanaugh
night427
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Mar 3, 2005
12:35 am
3266
If you're buying dark matter on eBay, insist on a flash photograph. Personally I prefer to collect cosmic background radiation. It takes up less space in my...
Cynthia Smith
cynthia5128
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Mar 3, 2005
1:45 am
3267
... gallon drums ... along the ... A P-32 rat would have decayed at P-32 rates. Also bio-rad-waste emissions would not have gone far under meters of water....
DH
revtkatt
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Mar 3, 2005
3:10 am
3268
... Personally I prefer ... my display cabinet. ... The thing is, with dark matter you just throw a few turnips in the flow and measure it. You look for the ...
DH
revtkatt
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Mar 3, 2005
3:18 am
3269
Does this make it any clearer? http://www.astronomy.com/asy/default.aspx?c=a&id=2907 Cynthia. :0) "Peculiar friends are better than no friends at all" (Anon.) ...
Cynthia Smith
cynthia5128
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Mar 3, 2005
4:40 am
3270
This is good too. http://www.astronomy.com/asy/default.aspx?c=a&id=2897 Cynthia. "Peculiar friends are better than no friends at all" (Anon.) "Don't torture...
Cynthia Smith
cynthia5128
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Mar 3, 2005
5:06 am
3271
The question was asked "how does the pancake probe compare to the CDV-700's standard #6993 probe?". The quick answer is that a pancake is 5.5 times more...
GEOelectronics
K0FF
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Mar 3, 2005
5:17 pm
3272
... In the present tense true. Although Bicron did make a pancake probe with a detachable, energy compensating, beta shield!...
J. Marshall Reber
groschen1936
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Mar 3, 2005
7:30 pm
3273
I want you guys to correct if I am wrong but is the following correct: 11 Na ---> 11 Na + 0e 21 22 1 0e + 0e ----> 2 0 y or gamma or Na-22...
chernobyl_87
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Mar 3, 2005
9:10 pm
3274
This site is very interesting does any one have any documentation to its area olong the genesse river I am a short drive from there. As far as for barrels I...
docico325@...
docusn1
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Mar 3, 2005
10:19 pm
3275
I don't remember where in the park they were buried. I have a map somewhere but it is buried in 10 years of files. If it ever turns up, I'll post it. _____ ...
Aaron Muderick
amuderick
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Mar 3, 2005
11:20 pm
3276
The Na-22 makes positrons, the positrons turn around and make the annihilation X-Ray photons. Any time you see a 511.000 keV photons, they came that way...
Geo
K0FF
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Mar 4, 2005
1:00 am
3277
... Bio waste barrels would have P-32, H-3 and other fairly short lived isotopes, all light elements and therefore beta emitters. Good luck finding what's...
DH
revtkatt
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Mar 4, 2005
4:39 am
3278
... Most but not all (thereby correcting my prev. post) lighter radioactive elements are beta emitters. They toss a negative so a neutron can become a proton, ...
DH
revtkatt
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Mar 4, 2005
4:51 am
3282
Activity, defined in Curies is simply the number of *nuclear disintegrations" per second ( or per minute if converted). The real question then is: "what is a...
GEOelectronics
K0FF
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Mar 4, 2005
5:29 pm
3283
Hi, I'm a new member and have been looking around for a good geiger counter. I read the FAQs and they were quite helpfull but hoped somone on the list could...
ianorg
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Mar 4, 2005
5:50 pm
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