Spectroscopy of the helium-3 isotope is a technique that investigates the atomic and molecular properties of this isotope by examining the emission and absorption spectrum of the helium-3 atom. Spectroscopy of the helium-3 isotope is usually performed in low-temperature and high-pressure environments because the superfluidity properties of helium-3 become more pronounced in such conditions. Spectroscopy of the helium-3 isotope can provide detailed information about the isotope's molecular structures, energy levels, chemical bonds, and other properties. This information could be important for scientists working in fields such as physics, chemistry, astrophysics and materials science. Spectroscopy of the helium-3 isotope can also be correlated with techniques such as nuclear magnetic resonance (NMR) spectroscopy, and these techniques can be used to study the behavior of the isotope in more detail. Spectroscopy of the helium-3 isotope may be an important tool to better understand the properties of this rare isotope and explore its potential applications.