Helium Lines (5.00 – 10.00 microns)
Infrared Helium Lines
| Atomic Line | Transition | Wavelength (um) |
| HEII | 20-12 | 05.1240 |
| HEII | 19-12 | 05.4522 |
| HEII | 13-10 | 05.5791 |
| HEII | 11-9 | 05.5813 |
| HEII | 18-12 | 05.9017 |
| HEII | 15-11 | 05.9630 |
| HEII | 17-12 | 06.5342 |
| HEII | 9-8 | 06.9480 |
| HEII | 14-11 | 07.2029 |
| HeI | 3sS-3p | 07.4351 |
| HEII | 12-10 | 07.4548 |
| HeI | 8-14 | 08.66 |
| HeI | 7-10 | 08.67 |
| HEII | 15-12 | 09.1114 |
| HEII | 13-11 | 09.7041 |
| HEII | 10-9 | 09.71 |
| HEI | 4sS-4pP | 10.88 |