Search found 122 matches

by Peter-1
20 Jan 2020, 01:00
Forum: Introductions >> Start Here !
Topic: Greetings from Germany
Replies: 3
Views: 68

Re: Greetings from Germany

Hello,
greetings from Erlangen to Erlangen :-)

Peter
by Peter-1
13 Dec 2019, 00:57
Forum: Spectrum
Topic: Boltwoodit
Replies: 1
Views: 93

Boltwoodit

Hello,
I got a small piece of mineral from namibia. It is Boltwoodit which is slightly radioactive. The fine yellow needles are easily recognizable. The spectrum shows very nicely the products of the decay series of uranium.
Peter
Boltwoodit-6.jpg
Boltwoodit-7.jpg
Boltwoodit-Spek.jpg
by Peter-1
10 Dec 2019, 00:36
Forum: Spectrum
Topic: Apatite
Replies: 9
Views: 619

Re: Apatite

Hello, I have now measured my sample with apatite from brazil and can see very well the decay products. Bi212, Ac228 and Tl208 shows thorium. The background shows 16 cps and with the apatite it is 170 cps. The whole stone weighs 160 grams and has a nice blue color. Peter Apatit-Bras.jpg Apatit-Spek....
by Peter-1
03 Dec 2019, 20:52
Forum: Spectrum
Topic: A Day in Fukushima - Gamma Spectroscopy
Replies: 17
Views: 471

Re: A Day in Fukushima - Gamma Spectroscopy

hello,
a very interesting report. Thank you for showing us the photos as well.

greetings
Peter
by Peter-1
27 Nov 2019, 02:54
Forum: General discussion
Topic: Mini Xray xrf
Replies: 14
Views: 418

Re: Mini Xray xrf

Here are some pictures of my equipment. Its an old normal NaI scintillator.
Szintillator-01.jpg
Szintillator-01.jpg (64.26 KiB) Viewed 116 times
Szintillator-02.jpg
Szintillator-02.jpg (96 KiB) Viewed 116 times
by Peter-1
27 Nov 2019, 01:53
Forum: General discussion
Topic: Mini Xray xrf
Replies: 14
Views: 418

Re: Mini Xray xrf

Hello Taray,
I am using some Am241 from a smoke detector for the XRF.
This goes from 15 keV to over 45 keV quite well.
Image
Peter
by Peter-1
09 Nov 2019, 01:15
Forum: Spectrum
Topic: Flossenbürger Granit
Replies: 1
Views: 127

Flossenbürger Granit

Hello, a few days ago, I received a sample of granite. This granite from the east of Germany is known for its increased radioactivity. It can be seen in the spectrum very well the decay products. From the count rate and the size of the stone I have calculated a value of about 500 Bq / kg. BKG cps 16...
by Peter-1
25 Oct 2019, 02:07
Forum: General discussion
Topic: Visual effect of long term radiation exposure on the acrylic glass of a watch
Replies: 7
Views: 432

Re: Visual effect of long term radiation exposure on the acrylic glass of a watch

I can show two examples of my old glass tubes. An X-ray tube for thorax imaging and a large tube for use in computed tomography.
Opti-150.jpg
Opti-150.jpg (81.61 KiB) Viewed 367 times
for power CT
Dura432.jpg
Dura432.jpg (57.8 KiB) Viewed 367 times
Peter
by Peter-1
24 Oct 2019, 19:08
Forum: Spectrum
Topic: Kr-85 Spectrum from Vacuum Tube
Replies: 4
Views: 1712

Re: Kr-85 Spectrum from Vacuum Tube

Hi Jonathan,
I have such a tube and also come to a nice spectrum. The measuring time was 6 hours.
2019_10_22-Röhre-Kr85.png
Peter
by Peter-1
17 Oct 2019, 19:30
Forum: Detectors
Topic: size of the cristal
Replies: 2
Views: 240

size of the cristal

What influence does the size of the scintillator crystal have on the resolution? Does it make sense to switch from a 2" to a 3" crystal? I have both the 3" crystal as well as the PMT in addition but it is a great effort to rebuild the whole shield.
Peter