Search found 1343 matches

by Jon Rosenstiel
Thu Apr 19, 2018 4:59 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: My Gamma Spectroscopy Setup
Replies: 5
Views: 740

Re: My Gamma Spectroscopy Setup

Richard, Appreciate the kind words. My reasoning behind all of this is that if something goes haywire with my back (I ain't no spring chicken) I will still have some hobbies that I can play with despite not being able to easily get around. (Anyway, that's the plan) Rich, Yeah, it's pretty-much one o...
by Jon Rosenstiel
Fri Apr 13, 2018 11:22 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: My Gamma Spectroscopy Setup
Replies: 5
Views: 740

My Gamma Spectroscopy Setup

It may have been 60 some years ago but I remember it like it was yesterday. I was sitting at my workbench in the basement of my parents’ home on our family farm listening to faint clicks in my headphones. The Geiger counter I had just finished building actually worked! The faint clicks were the resu...
by Jon Rosenstiel
Fri Mar 02, 2018 11:23 pm
Forum: New User Chat Area
Topic: IAEA SPEDAC PRO VER 5.0 WANTED
Replies: 1
Views: 353

Re: IAEA SPEDAC PRO VER 5.0 WANTED

Give FitzPeaks gamma spectrometry software a try. Free download at http://www.jimfitz.co.uk/fitzpeak.htm It will open and save gamma spec files in several different formats... may do what you want. Note that it requires 32 bit Windows.

Jon Rosenstiel
by Jon Rosenstiel
Mon Feb 12, 2018 8:58 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High Voltage Ballast Resistor and Inner Grid Help
Replies: 4
Views: 648

Re: High Voltage Ballast Resistor and Inner Grid Help

As to fusor grid wire, I suspect Dennis meant tungsten, not titanium.

Jon Rosenstiel
by Jon Rosenstiel
Thu Nov 23, 2017 7:44 pm
Forum: Images du Jour
Topic: Daniel Klasing Neutron Club Application
Replies: 13
Views: 1261

Re: Daniel Klasing Neutron Club Application

Daniel,
Below is what I normally see when using a bubble detector. Compared to the images of your BTI's note that the bubbles are smaller in size and are fairly evenly distributed throughout the detector's volume.
BTI.jpg
Jon Rosenstiel
by Jon Rosenstiel
Tue Nov 14, 2017 11:42 pm
Forum: New User Chat Area
Topic: CANBERRA SERIES 35 MCA STARTUP PROBLEM 2017
Replies: 5
Views: 748

Re: CANBERRA SERIES 35 MCA STARTUP PROBLEM 2017

Dropbox link to Canberra Series 35 Plus schematics.

https://www.dropbox.com/sh/fw75vox8xnoy ... _Ds-a?dl=0

Jon Rosenstiel
by Jon Rosenstiel
Mon Nov 06, 2017 2:06 am
Forum: Images du Jour
Topic: HEAS 2017 - post all images here!
Replies: 34
Views: 3275

Re: HEAS 2017 - post all images here!

As a 15-year old in the mid 1950's I remember my dad asking me: "Do you know what LSMFT means"? My answer was: "Lucky Strike Means Fine Tobacco"? Dad answered: "No, it means Lord, Save Me From Truman".

Jon Rosenstiel
by Jon Rosenstiel
Fri Aug 25, 2017 7:20 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: High purity Germanium detector design related clarifications
Replies: 17
Views: 2046

Re: High purity Germanium detector design related clarificat

I believe the purpose of the holes are to reduce leakage current. Below is a pic of an Ortec item. Ortec also uses a triangular support bracket similar to the plastic one in Ashish's detector, but it appears to be made from G10 or maybe G11 fiberglass laminate material, but without the holes. 2017-0...
by Jon Rosenstiel
Thu Mar 23, 2017 5:40 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Dysprosium Activation?
Replies: 19
Views: 2322

Re: Dysprosium Activation?

Garrett, The chunk I used was 123 grams. Dy 005a.jpg Don't know about beta emission as I didn't try facing it up to a GM counter. How long do you have to wait between runs? If it's not too long just keep hitting it as hard and as fast as you can. Dy-165's 2.3-hour half-life does give you a little wi...
by Jon Rosenstiel
Thu Mar 23, 2017 2:53 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Dysprosium Activation?
Replies: 19
Views: 2322

Re: Dysprosium Activation?

Garrett,

Yes, 20 minutes in the neutron oven at 4.0E+06 TIER.
Dysprosium.jpg
Jon Rosenstiel