Jim; Thanks for the information. I have a high impedance probe I use with a Simpson model 267 meter. It's 100 meg. I have used it on other Geiger counter...
Hi Dan, I have two 190s that I got on eBay and like them both. I have three probes with individual modules so that I can use any probe with either counter. I...
I have posted this information bvefore on one of these forums, but it bears reposting since there have been several posts on the topic of using DMMs for HV...
Hi, Valid comment, below is an extract from the Fluke 80k40 EHT probe manual, * The input impedance of Autoranging Fluke handheld digital multimeters varies as...
Lenox, Thank you for the excellent write up. The unit I have is white, and was last calibrated towards the end of 2005, it's due. I'll problably take your...
I got my start in geiger counters and electronics in the 60's when I found a book at the local library on atomic experiments you could do in the home. It...
I'm curious as to the actual frontal area (cross-sectional area)of gamma-rays. All the literature I've encountered so far is pretty quiet on the topic. Has...
Gamma rays are photons. So they use the same wavelength/frequency relationship as light. They are typically an angstrom or less in wavelength. Many orders of...
correct, if the gamma photon has made a click in a GM tube, generally it is consumed in that process. In a scintillator, a single photon can make several light...
... Photons are not directly affected by gravity. The effect you're probably thinking of is a result of the space around objects being warped by gravity. The...
What I was asking was, "Can a single gamma photon have a transverse cross-sectional area of, say, the size of a typical coffee cup saucer, such that it could...
correct, Einstein predicted that light from a distant star would be deflected by our sun, and it was proven to be the case during solar eclipses. Then there is...
... No. As I said, gamma photons are on the order of magnitude of an angstrom or less in size. Also, as Geo pointed out, photon interactions typically result...
We're getting closer! It seems to be common knowledge that gamma photons are really small (angstrom size) and I don't have a problem with their longitudinal ...
Photons are infinitely small, and exhibit longitudinal wavelength only because they are moving. My personal pet theory is that they rotate around a centroid...
... with a ... I really don't know if 100 Meg is high enough for this power supply. I use a 990 Meg is series. I should try it and see. I have a 100 Meg for...
In a message dated 2/2/2007 2:59:32 P.M. Central Standard Time, GEOelectronics@... writes: Photons are curious objects. They appear to have no mass,...
... The "dimensions" of a photon are simply a plot of points of "significant probability of detection". You calculate this probability distribution with the...
... The "dimensions" of a photon are simply a plot of points of "significant probability of detection". You calculate this probability distribution with the...
... Thanks Russell! As you might surmise, I am sort of questioning that very quantum mechanics (QM) concept. I've seen a few (very few) recent articles where...
... I don't know if it is. What you do is plot the diffraction pattern of the Schrodinger waves on the detector plane. When you plot the magnitude-squared of...
... I don't know if it is. What you do is plot the diffraction pattern of the Schrodinger waves on the detector plane. When you plot the magnitude-squared of...
Yesterday, I received a call from a friend who works as a watchmaker requesting that I bring my Ludlum Model 3 G/M counter to check whether or not a vintage...
Yes, indeedee, that was the book that started me along this crazy path. I discovered this little gem in the Dover, NH Public Library as a sixth-grader in...
... Here's your mistake. Röntgens are only defined for Gammas! Remove the Betas from your measurement by taking a reading through the back of your pancake...
Dennis, You can also measure the HV voltage indirectly with pretty good accuracy by measuring the voltage across R2 with a 10Meg DVM. Just multiply the R2...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
