| C3 | C6 | C8 | Ref. |
|---|---|---|---|
| 11.0028(0.0029) | 2.180(0.151)[3] | n/a | W. I. McAlexander, E. R. I. Abraham, and R. G. Hulet, Phys. Rev. A 54, R5 (1996) |
| 11.01 | 2.066[3] | 2.705[5] | M. Marinescu and A. Dalgarno, Phys. Rev. A 52, 311 (1995) |
| 11.02 | 1.927[3] | 2.296[5] | B. Bussery and M. Aubert-Frecon, J. Chem. Phys. 82, 3224 (1985) |
| 10.99 | 2.025[3] | 2.657[5] | F. Vigne-Maeder, Chem. Phys. 85, 139 (1984) |