| Acronym | Meaning |
| HFP | Hartree-Fock Perturbation |
| IBA | Ion Beam Analysis |
| AUDM | Advanced Unified Defect Model |
| SECI | Single Excitation Configuration Interaction |
| SSRL | Stanford Synchrotron Radiation Laboratory |
| CSRR | Coupled-state Rigid-rotor |
| TRES | Time-resolved Emission Spectroscopy |
| SACM | Statistical Adiabatic Channel Method (in Ion-mol. Reactions) |
| EBT | Electron Beam Tomography |
| NSCEP | National Service Center For Environmental Publications |