Detector

Some quick recommendations / popular equipment:

GQ
- Ex: GQ GMC-300S
- I'm not as familiar with these but price start quite low
- 2025-04-18: $62, link
MightyOhm w/ SBM-20
- Entry level kit
- Open source
- 2025-04-18: $120 on Amazon including SBM-20, link
Radiacode 102
- Very popular portable / compact gamma spectrometer
- 2025-03-18: $250 on amazon, link
Ludlum Model 3 Geiger counter
- The US nuclear industry standard Geiger counter / survey meter
- 2025: About $400 used on eBay (say wand or LND 723 tube)
Gamma Spectacular
- If you want to interface to a more specialized gamma spectrometer detector
Neutron detector
- Some Russian He-3 tubes work ok but there aren't any great standard options
- McMaster: I have a Ludlum Model 15 + some Eberline "sea mines
- They also tend to be difficult to test without specialized equipment / sources (working fusor, Po, etc)

FOSS

Vendor	Model	Notes
LND, INC.	723
Ludlum	44-7	See LND 723
TGM	N210	See LND 723
XETEX, INC.		See LND 723

Vendor	Model	Notes
Pomelo	Pomelo
Radiocode	102
Radiocode	103
ICX	Identifinder	ICX_identiFINDER

Vendor	Model	Notes
St Gobain		McMaster has a lot of these
Hitatchi	Vortex	McMaster misc parts
Oxford		McMaster missing sensor
Amtek		McMaster sitting in box untested

400 or 500 V depending on switch setting. Supported tubes:

  * PCB mount: STS-5, SBM-20, J305
  * External: LND-712, LND-7317, SBT-9, SI-29BG, etc
  * I use SBM-20

I have one from Atomic Dave and two bare units.

Include:

Material	Alpha	Beta	Gamma / x-ray	Neutron	Notes
Anthracene					https://en.wikipedia.org/wiki/Anthracene
NaI(Tl)