In order to preserve the information, articles, bench reviews and especially the pictures in GCE as we ran out of room at the end of our first year, PAGE 2 was...
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K0FF
Jul 17, 2003 11:59 pm
Up until now I always thought of Am241 being an Alpha emitter, with a single usable Gamma at 59.5 keV. Not so, there are actually at least 5 Gammas, with a...
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Dudley Emer
demer@...
Jul 18, 2003 5:11 am
George, welcome to the confusing world of gamma spectroscopy. It's a great brain teaser when figuring out what ya got. The unknown peak where the cursor is at...
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K0FF
Jul 18, 2003 5:15 pm
Thanks Dudley, here are the results: Please refer to the decay chain for U-238 on page 2 of this chart, if you do not have one printed already: ...
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K0FF
Jul 18, 2003 5:35 pm
Have you been looking for a really good ( and cheap) lab vacuum pump for your cloud chamber or other project? Try borrowing you wife's FOODSAVER food vacuum...
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Rev. T. Katt
revtkatt
Jul 18, 2003 6:10 pm
... definitive ... make the ... George, in msg 1567 I suggested that the 1400 peak was due to Bi-214 and the lower peak to Bi210. And I explained my...
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John Boyle
kb3cny@...
Jul 18, 2003 6:20 pm
George, I was wondering how easilly the 137 Cs calibration of the UCS-20 went. Did you use one of the SpecTech sources? John...
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K0FF
Jul 18, 2003 6:36 pm
Yes Bi-210 is another ( farther down) daughter, also known as Radium E. However it is not a significant Gamma emitter according to my chart ( the one mentioned...
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David Honig
revtkatt
Jul 18, 2003 7:01 pm
Geo, For when you get bored measuring the usual U & Th suspects: Living with Radiation mentions some unusual isotopes found in trinitite "50 years later":...
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civildefenseinfo2002
civildefense...
Jul 18, 2003 8:30 pm
It seems there has been much discussion as to the operational check sources on CD V-700's. We'll go by instrument, and will omit the Model 4 and below, since...
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Dudley Emer
demer@...
Jul 19, 2003 2:16 am
Yup, looks like K-40 was background alright. My deduction is your lab is in a basement with cinderblock walls, you were sitting at a bench with well shielded...
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K0FF
Jul 19, 2003 2:20 am
correct, especially the smile part! Say Dudley, I'm investigating an odd test spot. Came from a Victoreen Cutie pie. pattern like no other. Beta emitter of...
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K0FF
Jul 19, 2003 5:03 pm
Bill, Forgive the jpg file, but I had to show you the perfect fit (BINGO!) of your picked peaks! Taken with SpecTech UCS-20 and a 6" x 6" NaI crystal...
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Tracy Albert
thealbert1@...
Jul 21, 2003 10:41 pm
Hello all. I have all the fittings fitted, and a small pile of spare fittings in the project box. the portable air pump has been retrofitted with new Nicads...
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Dudley Emer
demer@...
Jul 22, 2003 4:42 am
Tracy these filters will be way over kill. I have some inlines that will work and have been trying to find a sample head and filter set up that is laying...
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J. Marshall Reber
groschen1936
Jul 22, 2003 12:17 pm
Eberline uses a Millipore corporation filter in their Working Level Monitor to capture Radon daughters. It is Cat. No.: AAWP02500 The 2500 indicates 25 mm...
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Tracy Albert
thealbert1@...
Jul 22, 2003 10:12 pm
Yes sir I felt the same way. But I also thought some of the group may also be interested in the filters. an ordinary disposable OSHA approved face mask is...
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K0FF
Jul 24, 2003 6:06 pm
K-40 puts out a nice little Gamma ray at 1460 keV, along with some Betas. A small percentage (.0117%) of all natural Potassium will be the isotope K-40. It is...
No not breakfast with LENi. This LENi has a built in pancake tube, as well as external sausage tube. In the tradition of the Ludlum 3-98, and T/A TBM-3 this...
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Justin
-harlequin-
Jul 26, 2003 2:32 am
... Hey - cool stuff. (I like modding things, and seeing other people's mods :) I've also put a BNC onto a probe. Since I don't know where to get a matching...
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K0FF
Jul 26, 2003 3:13 am
... From: "Justin" <> Hey - cool stuff. > I've also put a BNC onto a probe. Since I don't know where to get a ... It's called an AMP 3Pin mic socket. Been...
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Tracy Albert
thealbert1@...
Jul 27, 2003 8:42 pm
Just a few links for those who have an interest. http://www.nrpb.org/services/radon/radon_calibration.htm Excellent Info ...
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K0FF
Jul 28, 2003 1:14 am
Often used equipment will arrive with calibration stickers, ID tags, etc. still attached to the face. Consider yourself lucky if they are untampered with....
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Tracy Albert
thealbert1@...
Jul 28, 2003 2:33 am
George, Di-Limonene Soap is an Excellent solvent. I use it right out of the drum to strip paint from aluminium boats. The akali and Chlornated solvent paint...
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Tracy Albert
thealbert1
Jul 29, 2003 3:15 am
I have completed all of the mechanical and gas tight/light tight connections to the cell, the air pump will run for over 24 hours before a recharge and life is...
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Kubric@...
Jul 30, 2003 3:06 pm
George, We have had good luck removing stickers by using WD-40. Spray it on to saturate the sticker and let it sit for 10 to 15 min. then simply peel the...
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Alan R. Betz
alan61ca
Jul 31, 2003 11:10 pm
To any other scintillation detector constructors, I wanted to let you know that John Gateley, gapjohn@..., has available a few rolls of Scotch black...
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DH
revtkatt
Aug 1, 2003 4:34 pm
Seems possible to replicate an early fission experiment using a proportional counter, all you look for is huge pulses: ...
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K0FF
Aug 1, 2003 11:02 pm
Here is a hand probe I whomped up today. The element is one of the LND 7311's 2 inch 900V pancakes that are also used for the LENi Short Stack. This one is...
