开云体育

Geo? I am no expert??in this field. Activated charcoal (AC)has more universal absorption characteristics than coffee??due to high microporosity AC can??absorb

RE Trinity Sand: After some 34 hours have past, some more probable Eu-152 peaks starting to show (highlighted by red arrows) Normally a peak of <10 counts can be ignored. Put it off to random

"which brings me to burnout Randall" Not even close, Randall, once the electronics are as good as they can be (did you mention coaxial cable capacitance?), the tube itself, or rather the gas inside

Hi Taray, thanks for the update. Coffee for absorption media? Why not, tests cleaner/more neutral than local soil or sand I bet!! Definitely "cleaner" radioactivity-wise than say mushrooms from

Hi, There seem to be quite a few interrelated electrical parameters, physical properties (of the x-ray/PC chamber) and design compromises involved. I don't have it all organized into one simple

Here is a file about coffee xrf. Had difficulty sending earlier Taray

Hi guys I am about to conclude my coffee xrf analysis? Previously scanned dirty tap water coffee ground with evidence of some heavy metals like Fe,Zn etc The following 2 test was done on? 1

Dear Randall, Yes. You're right about the Hamamatsu - it is for a SiPIN. I have a vague memory that I saw some articles about the A-250 being deployed on satellites and I seem to remember the

Hi Soren, The patent is interesting but the other two are for Ortec 142 A/B/C type applications, like Geo and others are using, solid state PIN and other detectors. Randall

If you use Log or Sqrt mode you can also see the other Cd escape peak from the Sm Kb1at 22.19 kev as well as Am-241 at 59.4 Pretty pictures lie Dud Sent: Friday, December 11, 2020 10:48 AM To:

Gamma Spectrum scan only- no exciter-Desert sand. Excavated by ants outside the fenced area, see report by Rob Hermes etal. Small sample, having been picked through and "discarded" - just sand after

I found an interesting patents that eliminates the noise producing feedback resistor and also does some magic to avoid the need of a reset circuit to prevent saturation. It's pretty straightforward

Perfect A parts search,the easy way. Now to compare the op amp specs with the Ortec 142PC There may also be other, higher performance alternatives. With such a low capacitance in the Porp Chamber,

Wiki definition is Plutonium is classified according to the percentage of the contaminant plutonium-240 that it contains: Supergrade 2–3% Weapons grade 3–7% Fuel grade 7–18% Reactor grade

Here's another reference mentioning super-grade Pu-239. Of course that's what went in to the device. The ratio of Pu isotopes left in Trinitite is another matter entirely due to neutron absorption.

On Wed, Dec 9, 2020 at 12:38 PM, Dude wrote: > > > > Geo, > > > > The amount of Pu-240 in that era of devices was about 2.5% with Pu-241 of > about 0.05%. If you look at the Green Top CdTe

Randall, Thanks. Someone alerted me to the fact that Spectrum Techniques makes a preamp designed for Proportional Counters. There is not reference to it on their website, but the product manual with

Well, a very skeletal form of the Wiki is up. I setup the home page and created a basic structure for the information. As an experiment, I wrote up a page on NIM modules. It's all very rough, but it

Looks like Q11 is being used in diode mode with base emitter shorted. A transient voltage willshort the fet to ground via that diode. I am thinking OP Amp, discrete components are too much work,

Good. It's done. I had backup moderators on all the old lists. Just haven't gotten around to it on these all these new ones yet. One of the lists is an Archive of the old Yahoo Groups, one for each