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Messages 1732 - 1770 of 17484   Oldest  |  < Older  |  Newer >  |  Newest
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1732
... counters ... counters ... is a ... designed by ... to any ... people in ... I think that's the only reasonable explanation for the abuse of terminology....
DH
revtkatt
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Sep 1, 2004
7:07 am
1733
Source/Halflife/Alpha Energy/Neutron Yield per 10^6 primary alpha particles Pu-239/Be 2400yr 5.14Mev 65 Po-210/Be 138d 5.3Mev 73 Pu-238/Be 87.4y...
Geo Dowell
K0FF
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Sep 1, 2004
2:44 pm
1734
All radioisotope neutron sources are regulated by the NRC. While it may seem straightforward to simply put a piece of Beryllium in front of an Am241 source...
Brian/Joseph McDermott
bjmcder1845
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Sep 1, 2004
4:16 pm
1735
... What is deuterium commonly used for? Why isn't normal hydrogen used?...
Russell Shaw
rj2000_au
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Sep 1, 2004
4:27 pm
1736
I just received my copy of Living With Radiation: The First Hundred Years by Paule Frame & William Kolb and highly recommend it. A very good book book for the...
dx3752
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Sep 1, 2004
7:01 pm
1737
Geo, are you still working on your filter museum exhibit? I might be working soon for a company that does museum exhibits, and I learned that if you expose a...
DH
revtkatt
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Sep 1, 2004
8:42 pm
1738
... may seem ... Am241 ... generator ... I've been wondering about how deep the n come from on the Be grains recently.. since alphas don't go far.. Plus,...
DH
revtkatt
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Sep 1, 2004
8:46 pm
1739
Even if they would do all that destruction QUIETLY, but NOOOOOO! After visiting several museums around the country this summer ( Los Alamos, Albuquerque, Oak...
Geo
K0FF
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Sep 1, 2004
9:34 pm
1740
Deuterium is used as a tracer in biological processes, as well as in vacuum tubes, UV lamps and certain lasers. The cross section for the Proton fusion ...
Brian/Joseph McDermott
bjmcder1845
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Sep 1, 2004
11:32 pm
1741
There is a good reason to love Ludlum. Thay make the scale to match the probe type, and are easily interchanged. DIfferent scales for pancake, hot-dog,...
Geo
K0FF
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Sep 2, 2004
2:42 am
1745
Na-22 is of course a radioisotope of sodium, having a half-life of 2.6 years. Not naturally occurring, it is commonly created in a Cyclotron by bombarding...
Geo Dowell
K0FF
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Sep 2, 2004
9:52 pm
1752
.> What is deuterium commonly used for? Why isn't normal hydrogen used? Deuterium H-2 is an isotopes of normal hydrogen but has an extra Neutron in the atom....
starfire_003001
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Sep 4, 2004
9:21 pm
1753
Beta's are nothing more or less than electrons, given freedom of flight in a nuclear decay. Having a negative charge and very little mass, they can be...
Geo Dowell
K0FF
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Sep 5, 2004
8:19 pm
1754
Okay, listen up! I want all of you to memorize this list. There will be a test on it on Wednesday.. http://webmineral.com/determin/radioactivity.php...
kd4fnc
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Sep 5, 2004
10:09 pm
1755
HMMMM........ and here I though "Avagardo" was the kind of fruit that guacamole comes from! Geo...
Geo
K0FF
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Sep 5, 2004
10:43 pm
1756
Geo; Check the postal shipping info on this one...Does this agree with what you know? It's above 70 bacq... http://webmineral.com/data/Samarskite-(Y).shtml ...
kd4fnc
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Sep 5, 2004
11:19 pm
1757
... that ... No, Avagardo's number is 6 x 10^23 particles :-)...
DH
revtkatt
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Sep 6, 2004
3:18 am
1758
... which case we would call it a "Goesaroundatron", or maybe Wouldn't that be a Geosaroundatron? ^^^ Or a cyclotron, maybe :-)...
DH
revtkatt
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Sep 6, 2004
3:20 am
1759
... Let's see..one, two, three, four...This is gonna take a while... KD4FNC...
kd4fnc
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Sep 6, 2004
11:56 am
1760
I was mailing out some radium dialed clocks and watches about two weeks ago. The new limits on what you are allowed to ship have changed. The item can be no...
Chris Cavanaugh
night427
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Sep 6, 2004
12:24 pm
1761
I wondered about that. My brother is in Globe, AZ (mining town) and came upon a really nice torbernite sample. I told him to hold off on shipping it- it's...
kd4fnc
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Sep 6, 2004
12:45 pm
1762
I did not ask about shielding, but my impression was the activity is confined to the object, not how much activity is shielded. If it is 70 Bq, no shipping...
Chris Cavanaugh
night427
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Sep 6, 2004
1:31 pm
1763
The limit is 70 Bq/gram, correct? ... -- ... Chris Smolinski Black Cat Systems http://www.blackcatsystems.com...
Chris Smolinski
lastoneouttu...
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Sep 6, 2004
1:42 pm
1764
AHA, in that case, make it the fruit from which guaca-MOLE is made! Geo...
Geo
K0FF
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Sep 6, 2004
2:03 pm
1765
That is correct, see page 50 of this document. The Postman did not say per gram when he quoted me. http://www.usps.com/cpim/ftp/pubs/pub52.pdf Chris Cavanaugh...
Chris Cavanaugh
night427
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Sep 6, 2004
2:11 pm
1766
*From the 199 release of PUB52.* 347 Radioactive Materials (Hazard Class 7) 347.1 Definition Radioactive material is defined in 49 CFR 173.403 as any material ...
Geo
K0FF
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Sep 6, 2004
2:58 pm
1767
Expect United Nuclear to come out with the "Amazatron" soon then.... Dave...
dx3752
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Sep 6, 2004
6:01 pm
1768
Better naamed "Copyotron" I think. Geo...
Geo
K0FF
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Sep 6, 2004
8:56 pm
1769
ebay item 3838008655. Does anyone know what this instrument is supposed to do? PH...
Phil Hancock
manhole32000
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Sep 7, 2004
7:10 am
1770
Looks like an alpha detector, see link to PDR-10A below, < http://southernradiation.com/im62apdr10a.html > HTH, Robert G8RPI....
Robert Atkinson
robert8rpi
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Sep 7, 2004
9:15 am
Messages 1732 - 1770 of 17484   Oldest  |  < Older  |  Newer >  |  Newest
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