Th232 Gamma Spectrum

Thorium 232


The Th232 Gamma Spectrum, has many peaks stretching out to 2.6 MeV, and it can be tricky to identify the correct peaks. Detectors smaller than 2" x 2" may have difficulty seeing the higher end gammas, which means you are only seing part of the spectrum.

The following spectrum was recorded with a 3" NaI(Tl) detector with GS-1100-PRO and PRA 16. This spectrum was recorded with partial shielding, and therefore shows a prominent K40 peak at 1460 Kev.

Special thanks to Marek Dolleiser, for helping me with this spectrum, and providing some of the gamma peak data.

The following table contains the main gamma peaks present in the Thorium spectrum. Gamma peaks with intensity less than 1% have been omitted. 

Linear Scale Spectrum 

* Right click on image and open in new window to see full size.


Log Scale Spectrum 


* Right click on image and open in new window to see full size.


There are no products to list in this category.

Buy gamma spectrometry systems

Record your own gamma spectrum

Check out our affordable gamma spectroscopy kits, these include everything you need to set up a counting lab, we service governments, educational institutions, independent researchers and amateur scientists. We even offer a discount for students.

Gamma Spectrometry Systems


Purchasing information

Register and order online

Registering an account and ordering online is the easiest and safest way to get your order processed. Payments are securely handled by PayPal and for security reasons we do not store and payment details on our server, only your name address, email, phone and details of your purchase is retained on or server.


Student Discounts

We gladly offer full time students and amateur fusioneers a once off A$50 student discount on orders over $300, the discount is a self serve, honour system, so if you are very young or very old, and don't have a full time job or lot's of money, you simply type the word student into the coupon code field when you place your order. * To redeem a student coupong, you need to create an account and log in.

Educational Institutions

Talk to us about classroom bulk purchases, why share one spectroscopy system per class, when you can have one on every workbench. We can offer formal quotations by request and are happy to cooperate with government or institutional procurement teams. Please use contact us for a quote.