Spark gap without gamma ray

[Peter-1]

thank you MattiaB,

but ! The "Freigrenze" for CS137 in germany is 10 kBq. But the company supplies only CS137 with 15 kBq. Therefore it is not possible for private individuals.
Peter

[MartinM]

Point sources / Gamma Standards—Type D (GF-137-D) are offered from 3,7 kBq.

[Peter-1]

Thanks for the note. I will contact the company once but I dont think that they will supplie to private individuals.
For a simple calibration up to 2600keV I take my ThF4 source as you can see.

ThF4-11-1.jpg

Peter

[Peter-1]

from Eckert & Ziegler

......Licensing Requirements

It is Company policy to require
written verification of the customer’s
Agreement State or NRC radioactive
materials license for all items. No
orders will be processed without
a copy of the customer’s license
on file at Eckert & Ziegler Isotope
Products (EZIP). ............

Peter

[MartinM]

Yeah, that's the usual experience with lots of such companies. Some even don't respond to queries unless you're from a known company/institution.
I suggest you check Spectrum Techniques - they don't ask anything.

[Peter-1]

Hello,
now I have my test source.

ThF4-Strahler.jpg

It is ~ 100mg ThF4 in acryl and epoxy. This was in the past for AR coatings like MgF2 and others. All lines from Thorium are well known from 200 - 2600keV. It works fine.
Peter

[luuk]

Hi Peter,
That is an interesting source, were did you got it?
Is it possible to buy?
Luuk

[Peter-1]

Luuk,
Sorry you can not buy this source. DIY :-)
Peter

[brehwens]

Hi

I ordered some sources from Spectrum Techniques. It all got hold up in customs, but as all the paperwork was there it eventually was released and I got my package no questions asked.