Ne–He | 0.5940 | | 0.5 torr | |
| Pressure ratio of He to Ne was 4 | 61 |
| 0.6046 | | 0.5 torr | | Used prisms to suppress oscillation of intense lines at 1.15, 3.39, and 0.6328 | 61 |
| 0.6118 | | 0.5 torr | | 62 |
| 0.6293 | | 0.5 torr | | 62 |
| 0.6328 | | 0.07 mm Hg | | | OP = 0.1 mW, He at 0.7 mm Hg | 60 |
| 0.6351 | | 0.5 torr | | | Same as for 0.5940 line | 61 |
| 0.6401 | | 0.5 torr | | | Same as for 0.5940 line | 62 |
| 0.7305 | | 0.5 torr | | | Same as for 0.5940 line | 61 |
| 1.0798 | | 0.1 mm Hg | | | 2s–2p trans, He at 1 mm Hg | 64 |
| 1.08475 | | 0.1 mm Hg | | | 2s–2p trans, He at 1 mm Hg | 64 |
| 1.11461 | | 0.1 mm Hg | | | 2s–2p trans, He at 1 mm Hg | 64 |
| 1.11806 | | 0.1 mm Hg | | | He at 1 mm Hg | 63 |
| 1.13936 | | 0.1 mm Hg | | | Same as 1.0798 line | 64 |
| 1.14122 | | | | | | 65 |
| 1.15259 | | 0.1 mm Hg | | | He at 1 mm Hg, OP = 15 mW | 63 |
| 1.16047 | | | | | | 65 |
| 1.16173 | | 0.1 mm Hg | | | Same as 1.11806 line | 63 |
| 1.17700 | | 0.1 mm Hg | | | Same as 1.0798 line | 64 |
| 1.19882 | | 0.1 mm Hg | | | Same as 1.11806 line | 63 |
| 1.20696 | | 0.1 mm Hg | | | Same as 1.11806 line | 63 |
| 1.52349 | | 0.1 mm Hg | | | Same as 1.0798 line | 64 |
| 1.8281 | | | |
| 3.7 m discharge tube He at 0.5 torr | 66 |
| 1.8287 | | | | 66 |
| 1.8309 | | | | 66 |
| 1.8408 | | | | 66 |
| 1.8596 | | | | 66 |
| 1.8602 | | | | 66 |
| 1.9579 | | 0.1 torr | | | 3p–2s trans, He at 0.5 torr | 67 |
| 2.0348 | | 0.1 torr | | | 3p–2s trans, He at 0.5 torr | 67 |
| 2.03514 | | 50 mtorr | | | OP = 2 mW, He at 0.4 torr | 68 |
| 2.3952 | | | | | Same as 1.9579 line | 67 |
| 2.3958 | | 0.1 torr | | | OP = 60 mW, He at 0.5 torr | 70 |
| 3.3913 | | | | | 3s–3p trans, very intense | 69 |
| 35.602 | | 0.05 torr | | | He at 0.1 torr, OP ~ 1 μW | 71 |
| 53.486 | | 0.06 torr | | | He at 0.12 torr, OP ~ 1 μW | 71 |
| 54.117 | | 0.05 torr | | | He at 0.10 torr, OP ~ 1 μW | 71 |
| 57.355 | | 0.03 torr | | | He at 0.07 torr, OP ~ 1 μW | 71 |
Neon | 2.1019 | | 0.25 torr | | | OP = 1 mW | 72 |
| 2.10411 | | 0.25 torr | | | OP = 2 mW | 68 |
| 2.5400 | | | | | 4d–4p | 73 |
| 2.7581 | | | | | 4d–4p | 73 |
| 2.784 | | | | | 5s–4p | 73 |
| 2.864 | | | | | 4d–4p | 73 |
| 2.9456 | | | | | 5s–4p | 73 |
| 2.967 | | | | | 4d–4p | 73 |
| 2.9813 | | | | | 4d–4p | 73 |
| 3.0278 | | | | | 4d–4p | 73 |
| 3.3182 | | | | | 5s–4p | 73 |
| 3.3342 | | | | | 5s–4p | 73 |
| 3.3849 | | | | | | 73 |
| 3.4481 | | | | | 5s–4p | 73 |
| 3.5845 | | | | | 5s–4p | 73 |
| 3.9817 | | | | | 5s–4p | 73 |
| 5.40 | | | | | | 74 |
| 5.6667 | | | | | 4p–3d | 73 |
| 7.3228 | | | | | 6s–5p | 73 |
| 7.4221 | | | | | 6s–5p | 73 |
| 7.4799 | | | | | 4p–3d | 73 |
| 7.4994 | | | | | 6s–5p | 73 |
| 7.6163 | | | | | 4p–3d | 73 |
| 7.6461 | | | | | 5p–4d | 73 |
| 7.6510 | | | | | 4p–3d | 73 |
| 7.6925 | | | | | 4p–3d | 73 |
| 7.7015 | | | | | 4p–3d | 73 |
| 7.7407 | | | | | 4p–3d | 73 |
| 7.7655 | | | | | 4p–3d | 73 |
| 7.7815 | | | | | 6s–5p | 73 |
| 7.8368 | | | | | 6s–5p | 73 |
| 8.0088 | | | | | 4p–3d | 73 |
| 8.0621 | | | | | 4p–3d | 73 |
| 8.3370 | | | | | 4p–3d | 73 |
| 8.8413 | | | | | 4p–3d | 73 |
| 9.0896 | | | | | 6s–5p | 73 |
| 10.063 | | | | | 4p–3d | 73 |
| 10.0981 | | | | | 4p–3d | 73 |
| 11.902 | | | | | 5p–4d | 73 |
| 12.835 | | | | | 5p–4d | 73 |
| 13.739 | | | | | | 73 |
| 13.759 | | | | | | 73 |
| 16.638 | | | | | 5p–4d | 73 |
| 16.893 | | | | | 5p–4d | 73 |
| 16.947 | | | | | 5p–4d | 73 |
| 17.158 | | | | | 5p–4d | 73 |
| 17.804 | | | | | 5p–4d | 73 |
| 17.841 | | | | | 5p–4d | 73 |
| 17.888 | | | | | 5p–4d | 73 |
| 18.396 | | | | | 5p–4d | 73 |
| 20.480 | | | | | 6p–5d | 73 |
| 21.752 | | | | | 6p–5d | 73 |
| 22.836 | | | | | 5p–4d | 73 |
| 25.423 | | | | | 6p–5d | 73 |
| 28.053 | | | | | 6p–5d | 73 |
| 31.928 | | 0.05 torr | | | 6p–5d | 71 |
| 34.649 | | 0.05 torr | | | 6p–5d | 71 |
| 37.231 | | 0.05 torr | | | 6p–5d | 71 |
| 41.741 | | 0.05 torr | | | 6p–5d | 71 |
| 68.329 | | 0.035 torr |
| | OP = 7 μW | 75 |
| 85.047 | | 0.035 torr | | 75 |
Xenon | 2.0261 | | | | | OP = 5 mW | 72 |
| 2.3200 | | | | | | 74, 76 |
| 2.6276 | | | | | | 79 |
| 2.6513 | | | | | | 74, 76 |
| 2.6608 | | | | | | 76 |
| 3.1078 | | | | | | 74, 76 |
| 3.3676 | | | | | | 74, 76 |
| 3.435 | | | | | | 74, 76 |
| 3.5080 | | 0.03 torr | | | w/wo He at 1.9 torr, very high gain | 76, 77 |
| | | | | | | 78 |
| 3.66 | | | | | | 74, 76 |
| 3.6798 | | | | | | 76 |
| 3.6859 | | | | | | 76 |
| 3.8697 | | | | | | 74, 76 |
| 3.8950 | | | | | | 74, 76 |
| 3.9966 | | | | | | 74, 76 |
| 4.1527 | | | | | | 74, 76 |
| 4.6109 | | | | | | 74, 76 |
| 5.5754 | | | | | | 74, 76 |
| 7.3167 | | | | | | 74, 76 |
| 9.0065 | | | | | | 76, 79 |
| 9.7029 | | | | | | 76, 79 |
| 9.80 | | | | | | 74, 76 |
| 12.27 | | | | | | 76, 79 |
| 12.917 | | | | | | 76, 79 |
| 18.506 | | | | | | 73 |
Argon | 1.618 | | 0.05 mm Hg | | | | 72 |
| 1.694 | | 0.035 mm Hg | | | OP = 0.5 mW | 72 |
| 1.793 | | 0.035 mm Hg | | | | 72 |
| 2.0616 | | 0.035 mm Hg | | | OP = 1 mW | 76 |
| 2.1339 | | | | | 3p–4p | 73 |
| 2.2045 | | | | | 3p–4p | 73 |
| 2.3139 | | | | | 3p–4p | 73 |
| 2.3973 | | | | | 3p–4p | 73 |
| 2.5014 | | | | | | 73 |
| 2.5494 | | | | | 5p–3d | 73 |
| 2.5634 | | | | | 5p–3d | 73 |
| 2.6843 | | | | | 5p–3d | 73 |
| 2.7356 | | | | | 5p–3d | 73 |
| 2.8238 | | | | | | 73 |
| 2.8843 | | | | | 5p–3d | 73 |
| 2.9272 | | | | | 5p–3d | 73 |
| 2.9788 | | | | | | 73 |
| 3.0453 | | | | | 5p–3d | 73 |
| 3.0996 | | | | | 5p–3d | 73 |
| 3.1346 | | | | | 6p–4d | 73 |
| 4.7330 | | | | | 5p–3d | 73 |
| 4.9160 | | | | | 6p–4d | 73 |
| 5.1218 | | | | | | 73 |
| 5.4680 | | | | | | 73 |
| 5.8477 | | | | | | 73 |
| 6.0531 | | | | | 4d–5p | 73 |
| 6.9429 | | | | | 4d–5p | 73 |
| 7.2166 | | | | | | 73 |
| 7.8063 | | | | | | 73 |
| 12.141 | | | | | | 73 |
| 15.037 | | | | | | 73 |
| 26.944 | | | | | | 73 |
Argon (I) | 0.4545 | | 1 mtorr |
| | 4p–4s; w/wo Ne or He at 0.2 torr each, pulsed 70–2000 pps, 20 kV-40 A; 0.5287 needs He or Ne; average power 0.2–0.5 W, peak power 0.4–1.0 W | 80 |
| 0.45794 | | 1 mtorr | | 80 |
| 0.46579 | | 1 mtorr | | 80 |
| 0.47269 | | 1 mtorr | | 80 |
| 0.47649 | | 1 mtorr | | 80 |
| 0.48799 | | 1 mtorr | | 80 |
| 0.49651 | | 1 mtorr | | 80 |
| 0.50172 | | 1 mtorr | | 80 |
| 0.51453 | | 1 mtorr | | 80 |
| 0.5287 | | 1 mtorr | | 80 |
Krypton | 1.690 | | 0.07 mm Hg | | | | 72, 75 |
| 1.694 | | 0.05 mm Hg | | | | 72, 75 |
| 1.784 | | 0.07 mm Hg | | | | 72, 75 |
| 1.819 | | 0.07 mm Hg | | | | 72, 75 |
| 1.921 | | 0.035 mm Hg | | | | 72, 75 |
| 2.116 | | 0.035 mm Hg | | | OP = 2 mW | 72, 75 |
| 2.189 | | 0.035 mm Hg | | | OP = 1 mW | 72, 75 |
| 2.52 | | | | | | 74 |
| 2.6267 | | | | | | 73 |
| 2.8655 | | | | | | 73 |
| 2.9845 | | | | | | 73 |
| 3.0536 | | | | | | 73 |
| 3.0672 | | | | | | 73 |
| 3.1515 | | | | | | 73 |
| 3.3419 | | | | | | 73 |
| 3.4680 | | | | | | 73 |
| 3.4883 | | | | | | 73 |
| 4.3748 | | | | | | 73 |
| 4.8773 | | | | | | 73 |
| 5.3000 | | | | | | 73 |
| 5.5700 | | | | | | 73 |
| 5.5863 | | | | | | 73 |
| 5.6306 | | | | | | 73 |
| 7.0581 | | | | | | 73 |
Hg | 1.52954 | | 10−3 mm Hg | | | OP = 0.3 mW, w/wo Ne or He at 0.1 → 3 mm Hg, 16%/m gain | 82, 83 |
| | | | | | 86 |
| 1.813 | | 10−3 mm Hg | | | OP = 0.3 mW, w/wo Ne or He at 0.1 → 3 mm Hg, 150%/m gain | 82, 83 |
| | | | | | 86 |
Hg (I) | 0.5225 | | 2 mm Hg | | | Pulsed, 2000 pps, 40 kV-30 A | |
| | | w He | | | 85 |
| 0.5678 | | 1 mtorr | | | Pulsed, 60 pps, 40-W threshold with He at 0.5 torr | 84 |
| 0.6150 | | 1 mtorr | | | Pulsed, 60 pps, 40-W threshold with He at 0.5 torr | 84 |
| 0.7346 | | 1 mtorr | | | Same as 0.5678 except no He | 84 |
| 1.0583 | | 1 mtorr | | | Same as 0.5678 except no He | 84 |
| 1.222 | | 0.2 mm Hg |
| | With argon, cw | 85 |
| 1.246 | | 0.2 mm Hg | | 85 |
| 1.276 | | 0.2 mm Hg | | 85 |
| 1.74 | | | | | cw, OP = 0.08 mW, 6%/m gain, with He, Ne, Ar, or air | 86 |
| 3.34 | | | | | Same as 1.74 except OP = 0.02 mW | 86 |
| 3.93 | | | | | cw, OP = 0.2 mW, 30%/m gain | 86 |
| 5.85 | | | | | cw, OP = 0.4 mW, 200%/m gain | 86 |
Nitrogen | 1.3583 |
| NO, N2O | |
| With either He at 2 torr or Ne at 1 torr | 73 |
| 1.4544 | at 0.3 torr | | 73 |
| 0.86835 | | 4 torr | | | | 87 |
| 0.86912 | | 4 torr | | | | 87 |
| 0.86980 | | 4 torr | | | | 87 |
| 0.87044 | | 4 torr | | | | 87 |
| 0.87090 | | 4 torr | | | | 87 |
| 0.88440 | | 4 torr | | | | 87 |
| 0.88478 | | 4 torr | | | All pulsed by dc discharge 20 kV- | 87 |
| 0.88523 | | 4 torr | | | 30 A, 50–150 pps | 87 |
| 0.88563 | | 4 torr | | | | 87 |
| 0.88625 | | 4 torr | | | | 87 |
| 0.88711 | | 4 torr | | | | 87 |
| 0.88790 | | 4 torr | | | | 87 |
| 0.88865 | | 4 torr | | | | 87 |
| 0.88927 | | 4 torr | | | | 87 |
| 0.88989 | | 4 torr | | | | 87 |
| 0.89093 | | 4 torr | | | | 87 |
| 1.04493 | | 4 torr | | | | 87 |
| 1.04612 | | 4 torr | | | | 87 |
| 1.04723 | | 4 torr | | | | 87 |
| 1.04800 | | 4 torr | | | | 87 |
| 1.04909 | | 4 torr | | | All pulsed by dc discharge 20 kV- | 87 |
| 1.04948 | | 4 torr | | | 30 A, 50–150 pps | 87 |
| 1.05052 | | 4 torr | | | | 87 |
| 1.2303 | | 4 torr | | | | 87 |
| 1.2312 | | 4 torr | | | | 87 |
| 1.2319 | | 4 torr | | | | 87 |
| 1.2334 | | 4 torr | | | | 87 |
| 1.2347 | | 4 torr | | | | 87 |
Cesium | 7.18 | | | | | cw OP = 50 μW, 800-W threshold pulsed OP (peak) = 1-W optical pumping by 0.3888 line of He discharge | 81 |
Iodine | 3.236 | | | |
| Assignment to 1(1), I, I2 undetermined | |
| 3.431 | | | | 82 |
Chlorine | 1.9754 |
| 0.04 0.6 torr | | | w/wo He at 1.5 torr, 250-W input, | 88 |
| | | | OP = 0.5 mW, due to either | |
| 2.0200 | | | Cl2 or CI (I) | 88 |
Br2 | 0.844628 | | 90 mtorr | | | with 1.8 torr of argon | 73 |
| 0.844638 | | 90 mtorr | | | with 1.8 torr of argon | 73 |
| 0.844670 | | 90 mtorr | | | with 1.8 torr of argon | 73 |
| 0.844679 | | 90 mtorr | | | with 1.8 torr of argon | 73 |
He | 2.0603 | | | | | OP = 3 mW | 72 |
Oxygen (I) | 0.8446 | | 14 mtorr and 36 mtorr | | | cw, OP = 2 mW, 3%/m gain | 73 |
| | | | | τF = 3 Gc/sec, with He, Ar, N2O + He, NO, CO2 + He, or CO | 89 |
Sulfur (SF6) | 1.0455 | | 30 mtorr | | | w/wo He at 2 torr | 73 |
| 1.0628 | | 30 mtorr | | | | |
Carbon (CO, CO2) | 1.0689 | | 10 mtorr | | | with 2 torr of He or 1 torr of Ne, pulsed, OP (peak) = 0.7 W 15 kV-30 A pulses, 1000 pps | 90 |
| 1.4539 | | 10 mtorr | | | cw, with He (2 torr) or Ne (1 torr) | 90 |