Recommended Format

MARVEL Input Format (suggested)

1. Wavenumber (cm-1)
2. Uncertainty
3. S' (Upper electronic state)
4. v' (Upper vibrational quantum number)
5. J' (Upper rotational quantum number)
6. S" (Lower electronic state)
7. v'' (Lower vibrational quantum number
8. J" (Lower rotational quantum number)
9. ID (unique for each transition)

Quantum Numbers

• Electronic state, S
  • e.g. X1Sigma+, b3Pi
  • For non-singlet states, this will also contain the omega quantum number, e.g. b3Pi_1, b3Pi_2, b3Pi_3
  • For Pi states, this will also contain the parity; e.g. +/- or e/f (ask your tutor)
• Vibrational quantum number, v
  • v=0,1,2,...
• Rotational quantum number, J, (strictly, this is total angular momentum)
  • J is either integer or half integer
  • Some sources may use N instead of J; talk to your supervisor about which quantum number you will be using