r | d | θ | ng | Δλ | ngΔω/ω | vg |
0.200a | 0.200a | 160o | 36.2 | 10.8 | 0.253 | 0.028c |
0.225a | 0.225a | 140o | 41.1 | 8.1 | 0.209 | 0.024c |
0.250a | 0.250a | 128o | 49.8 | 6.8 | 0.206 | 0.020c |
0.275a | 0.275a | 120.5o | 63.7 | 4.0 | 0.162 | 0.016c |
0.300a | 0.300a | 114.8o | 83.3 | 3.0 | 0.162 | 0.012c |