### Navigation

- index
- modules
- toc
- next
- previous
- PSI4 [beta5] »
- Appendices »
- Keywords by Module »
- CCEOM »

# EXCITATION_RANGE

> The depth into the occupied and valence spaces from which one-electron excitations are seeded into the Davidson guess to the CIS (the default of 2 includes all single excitations between HOMO-1, HOMO, LUMO, and LUMO+1). This CIS is in turn the Davidson guess to the EOM-CC. Expand to capture more exotic excited states in the EOM-CC calculation

> - Type: integer
> - Default: 2

### Navigation

- index
- modules
- toc
- next
- previous
- PSI4 [beta5] »
- Appendices »
- Keywords by Module »
- CCEOM »