Positron annihilation spectroscopy
| Condensed matter experiments | 
|---|
| ARPES | 
| ACAR | 
| Neutron scattering | 
| X-ray spectroscopy | 
| Quantum oscillations | 
| Scanning tunneling microscopy | 
Positron annihilation spectroscopy (PAS) or sometimes specifically referred to as positron annihilation lifetime spectroscopy (PALS) is a non-destructive spectroscopy technique to study voids and defects in solids.