![[spectre-examples.png]] The Radiacode provides a means to perform spectral analysis of the gamma background in the field as well as radiation from active samples. Examples of spectra of some common isotopes are provided on this page to demonstrate the capabilities of the instrument as well as to expand the user's knowledge. **The following recommendations should be considered when analyzing:** 1. A sufficient number of pulses in the channels should be acquired to increase the validity of the spectrum areas of interest. Reliable parts of the spectrum on the graph are shown in yellow color, which corresponds to the set of at least 100 pulses in the rightmost channel. However, in some cases, for energies above 1000 keV it is possible to analyze with fewer pulses in the channels. 2. The width of the peak depends on the energy of the gamma rays. At medium energies (660 keV) the peaks cannot be narrower than 6 channels wide at half height. With increasing energy the peak width increases. 3. The shape of the peaks is bell-shaped and close to Gaussian. Other shapes may be produced by a combination of several close peaks (e.g., 911 and 968 keV from thorium-232), insufficient pulse set in the channels, and the influence of electromagnetic interference. 4. The appearance of anomalously high and, at the same time, anomalously narrow peaks is not characteristic of the radiation background. The cause of such distortions can be either strong electromagnetic interference, to which the electronic circuitry of the instrument reacts, or malfunctions in the instrument hardware. In this case it is recommended to restart the spectrum set. 5. The spectral composition of the studied radiation can be very diverse. It is useful to enable the option "Display isotope information" in the "Spectrum" and "View" modes settings. In this case, when you place the cursor near one of the characteristic energies of an isotope, other energies of this isotope will also be marked with vertical markers. The set of examples includes spectra of only the most common radionuclides. The spectra are typed with a real serial instrument. A current list of example spectra is available by clicking on the links: - [Natural background](https://radiacode.com/isotope/natural-background) - [The electron-positron annihilation line](https://radiacode.com/isotope/annihil) - [High-energy particles](https://radiacode.com/isotope/high-energy-particles) - [H-3](https://radiacode.com/isotope/h-3) - [F-18](https://radiacode.com/isotope/f-18) - [Na-22](https://radiacode.com/isotope/na-22) - [Al-26](https://radiacode.com/isotope/al-26) - [K-40](https://radiacode.com/isotope/k-40) - [Sc-44](https://radiacode.com/isotope/sc-44) - [Ti-44](https://radiacode.com/isotope/ti-44) - [Mn-54](https://radiacode.com/isotope/mn-54) - [Co-57](https://radiacode.com/isotope/co-57) - [Co-60](https://radiacode.com/isotope/co-60) - [Ni-63](https://radiacode.com/isotope/ni-63) - [Ga-67](https://radiacode.com/isotope/ga-67) - [Se-75](https://radiacode.com/isotope/se-75) - [Kr-85](https://radiacode.com/isotope/kr-85) - [Rb-81 + Rb-82m](https://radiacode.com/isotope/rb-81-rb-82m) - [Sr-90](https://radiacode.com/isotope/sr-90) - [Y-90](https://radiacode.com/isotope/y-90) - [Zr-95](https://radiacode.com/isotope/zr-95) - [Mo-99](https://radiacode.com/isotope/mo-99) - [Tc-99m](https://radiacode.com/isotope/tc-99m) - [Ag-108m](https://radiacode.com/isotope/ag-108m) - [I-123](https://radiacode.com/isotope/i-123) - [Cs-137](https://radiacode.com/isotope/cs-137) - [Ba-133](https://radiacode.com/isotope/ba-133) - [Pm-147](https://radiacode.com/isotope/pm-147) - [Sm-153](https://radiacode.com/isotope/sm-153) - [Eu-152](https://radiacode.com/isotope/eu-152) - [Lu-176](https://radiacode.com/isotope/lu-176) - [Lu-177](https://radiacode.com/isotope/lu-177) - [Au-198](https://radiacode.com/isotope/au-198) - [Tl-208](https://radiacode.com/isotope/tl-208) - [Pb-210 + Ra-226](https://radiacode.com/isotope/pb-210+ra-226) - [Pb-210](https://radiacode.com/isotope/pb-210) - [Bi-214](https://radiacode.com/isotope/bi-214) - [Po-210](https://radiacode.com/isotope/po-210) - [Rn-222](https://radiacode.com/isotope/rn-222) - [Ra-226](https://radiacode.com/isotope/ra-226) - [Ac-228](https://radiacode.com/isotope/ac-228) - [Th-232](https://radiacode.com/isotope/th-232) - [Pa-234m](https://radiacode.com/isotope/pa-234m) - [Uranium (natural)](https://radiacode.com/isotope/uranium-nat) - [Uranium (without radium)](https://radiacode.com/isotope/uranium-wo-ra) - [Am-241](https://radiacode.com/isotope/am-241)