Unassigned lines recorded in the LIF spectrum of the green system of FeH Wavenumber (cm-1) Intensity (^a) Monochromator (^b) 18340.023 vw 20325 18340.057 m 20325 18340.182 w 20525 18353.515 vw 20213 18404.811 w 20213 18405.083 vw 20213 18405.316 vw 20213 18406.710 vw 20213 18406.921 w 20213 18407.096 vw 20213 18407.680 w 20213 18407.872 s 20213 18408.082 w 20213 18410.822 vw 20232 18411.119 vw 20232 18411.562 m 20232 18411.978 vw 20232 18412.054 w 20232 18412.124 m 20232 18412.495 w 20232 18413.052 vw 20232 18413.782 m 20064 18414.305 m 20064 18447.420 w 20080 18447.490 vw 20080 18449.087 vw 20356 18449.265 vw 20356 18453.363 vw 20356 18453.424 vw 20356 18454.279 vw 20356 18454.501 vw 20356 18455.724 vw 20356 18456.303 m 20356 18456.398 vw 20356 18458.576 vw 20356 18458.692 vw 20356 18462.140 w 20232 18463.016 vw 20232 18463.234 w 20232 18463.346 vw 20232 18463.571 vw 20232 18463.783 vw 20232 18464.799 vw 20232 18464.937 vw 20232 18465.054 vw 20232 18467.134 vw 20248 18467.237 s 20248 18467.308 m 20248 18467.567 w 20248 18475.524 w 20115 18475.988 w 20115 18477.210 vw 20254 18477.659 vw 20254 18478.635 vw 20254 18480.461 vw 20254 18480.626 vw 20254 18481.050 vw 20254 18481.857 vw 20254 18482.138 vw 20254 18482.285 m 20254 18482.488 vw 20254 18482.936 vw 20254 18483.009 m 20254 18483.076 vw 20254 18483.264 w 20254 18483.423 m 20254 18486.583 s 20248 18502.503 vw 20164 18505.010 m 20145 18505.240 w 20205 18505.446 m 20145 18505.522 w 20145 18505.809 vw 20221 18506.200 vw 20221 18506.401 w 20221 18506.430 vw 20145 18508.038 w 20183 18508.334 w 20183 18510.022 w 20270 18513.367 m 20167 18513.508 vw 20167 18516.986 w 20191 18517.169 w 20191 18517.850 vw 20191 18518.816 vw 20191 18518.965 vw 20191 18519.016 vw 20191 18520.463 w 20191 18521.077 w 20191 18523.224 m 20191 18523.254 m 20191 18530.140 vw 20300 18530.306 vw 20300 18530.637 w 20300 18530.720 vw 20300 18530.889 vw 20300 18531.125 w 20300 18531.219 w 20300 18531.288 w 20300 18531.968 vw 20300 18532.023 vw 20300 18532.587 vw 20300 18532.704 vw 20300 18533.179 vw 20300 18533.595 vw 20300 18533.712 vw 20300 18533.783 vw 20300 18533.904 vw 20300 18534.032 vw 20300 18534.155 w 20300 18534.291 vw 20300 18534.631 vw 20300 18534.709 vw 20300 18535.250 vw 20300 18535.434 vw 20300 18536.177 w 20276 18537.265 vw 20251 18537.831 vw 20251 18538.064 vw 20251 18538.257 m 20251 18538.408 vw 20251 18538.662 vw 20251 18538.750 w 20270 18538.917 vw 20270 18539.604 m 20270 18540.229 vw 20270 18540.383 vw 20270 18540.682 w 20270 18540.866 w 20270 18540.880 w 20270 18540.941 vw 20270 18541.070 vw 20270 18541.357 w 20270 18542.499 vw 20270 18542.722 vw 20270 18551.738 w 20178 18551.872 w 20178 18552.476 w 20178 18552.509 w 20178 18552.630 vw 20178 18552.700 w 20178 18552.878 m 20183 18552.990 w 20183 18553.307 m 20183 18553.362 w 20183 18553.710 vw 20178 18553.801 vw 20178 18554.117 vw 20178 18558.668 m 20164 18558.803 m 20164 18558.880 m 20164 18558.992 m 20164 18559.151 w 20164 18559.256 vw 20416 18563.979 w 20197 18564.732 w 20254 18565.240 m 20254 18567.534 vw 20254 18567.753 vw 20254 18567.993 vw 20254 18568.152 vw 20254 18570.153 vw 20389 18570.556 m 20389 18570.808 vw 20389 18572.821 vw 20389 18573.355 vw 20389 18573.597 vw 20389 18575.135 vw 20389 18575.477 w 20389 18576.113 w 20389 18576.237 w 20389 18576.451 w 20389 18577.980 vw 20389 18579.244 w 20221 18579.648 vw 20298 18579.725 vw 20298 18580.377 vw 20298 18580.457 vw 20298 18580.819 w 20389 18581.280 m 20167 18581.545 w 20167 18581.844 w 20167 18581.905 m 20167 18582.003 w 20167 18583.338 w 20167 18583.541 vw 20167 18584.080 vw 20167 18592.611 vw 20235 18592.741 vw 20235 18594.115 m 20235 18594.245 vw 20235 18594.276 vw 20235 18594.789 w 20248 18594.921 vw 20248 18596.161 vw 20356 18596.584 w 20356 18597.505 w 20183 18599.182 w 20164 18599.464 w 20164 18599.500 w 20164 18599.883 vw 20183 18600.185 w 20183 18600.307 vw 20183 18606.845 vw 20191 18607.106 vw 20191 18607.477 vw 20191 18608.582 m 20191 18608.601 vw 20251 18608.851 vw 20389 18608.972 vw 20251 18609.321 m 20270 18609.532 s 20270 18609.596 m 20270 18609.861 vw 20389 18609.993 w 20270 18610.217 vw 20191 18610.302 s 20270 18610.535 s 20270 18611.122 m 20191 18611.317 m 20191 18611.637 m 20191 18612.019 m 20191 18613.975 vw 20259 18614.033 vw 20259 18614.462 vw 20259 18616.166 vw 20202 18616.454 vw 20276 18616.527 w 20276 18616.782 vw 20276 18617.186 w 20276 18617.957 vw 20276 18619.461 vw 20276 18620.056 vw 20276 18621.169 vw 20276 18621.570 vw 20422 18621.700 vw 20422 18621.832 vw 20276 18622.801 vw 20276 18622.920 w 20276 18623.178 w 20276 18623.427 w 20303 18626.484 w 20303 18626.624 vw 20303 18626.820 w 20259 18627.224 m 20259 18628.823 vw 20303 18628.993 vw 20303 18629.041^c vw 20303 18629.635 vw 20303 18631.200 w 20276 18631.241 w 20276 18632.040 w 20303 18632.101 w 20303 18632.219 vw 20303 18632.360 w 20303 18632.782 s 20276 18632.801 s 20276 18632.860 m 20276 18633.025 w 20276 18633.084^c w 20276 18633.824 s 20276 18633.873 m 20276 18634.532 w 20276 18634.567 w 20300 18635.620 vw 20300 18638.920 vw 20221 18639.355 vw 20221 18640.853 vw 20221 18640.919 s 20221 18641.048 w 20221 18641.829 vw 20284 18642.041 vw 20284 18642.207 vw 20284 18642.591 w 20221 18642.685 w 20221 18643.015 w 20221 18643.659 w 20221 18649.139 w 20276 18649.171 w 20276 18649.379 m 20276 18649.823 m 20276 18649.851 m 20276 18649.992 m 20276 18652.949 w 20276 18653.066^c vw 20276 18653.425 vw 20276 18653.531 vw 20276 18662.896 w 20248 18663.144 vw 20248 18664.874 vs 20284 18666.202 vw 20167 18666.551 m 20167 18666.628 vw 20167 18666.961 w 20248 18667.270 vw 20248 18667.580 vw 20248 18668.256 w 20248 18668.868 vw 20248 18669.007 m 20248 18669.078 vw 20248 18669.616 vw 20240 18669.772 w 20248 18670.144 w 20248 18670.246 w 20248 18676.352 vw 20298 18676.443 vw 20298 18676.586 m 20298 18677.063 vw 20298 18677.345 w 20414 18677.590 w 20306 18677.666 w 20306 18677.917 s 20306 18678.785 s 20339 18679.462 s 20339 18679.668 w 20339 18680.592 vw 20339 18684.418 vw 20331 18684.503 m 20331 18684.648 vw 20331 18684.839 vw 20331 18692.190 vw 20270 18692.396 vw 20270 18693.290 w 20270 18693.478 w 20270 18693.965 w 20333 18694.062 vw 20333 18694.350 vw 20270 18694.751 m 20270 18694.895 vw 20270 18695.265 vw 20270 18695.465 w 20356 18695.659 w 20356 18696.029 vw 20458 18696.258 w 20270 18696.716 m 20270 18697.598 vw 20458 18698.023 w 20270 18699.151 vw 20458 18699.759 w 20458 18699.939 vw 20458 18700.005 w 20458 18700.190^c vw 20458 18700.690 vw 20458 18701.191 vw 20458 18712.140 m 20333 18712.342 m 20333 18718.036 w 20303 18718.596 vw 20389 18719.003 w 20276 18719.484 vw 20276 18720.058 vw 20276 18720.200 vw 20276 18720.486 vw 20276 18720.581 vw 20276 18724.103 vw 20300 18726.199 w 20579 18728.083 m 20300 18728.653 m 20303 18728.829 w 20303 18731.269 w 20303 18731.298 w 20303 18731.538 w 20303 18731.707 w 20303 18731.778 w 20303 18732.452^c w 20303 18742.488 vw 20422 18743.418 vw 20422 18743.867 vw 20422 18744.384 vw 20422 18744.852 vw 20422 18745.243 w 20325 18745.575 m 20325 18745.625 m 20325 18745.872 w 20325 18746.432 vw 20325 18746.478 vw 20325 18746.594 vw 20325 18746.781 vw 20325 18747.882 w 20325 18748.194 vw 20325 18748.405 vw 20325 18758.569 w 20259 18758.693 w 20259 18777.602 vw 20425 18780.685 w 20243 18785.444 vw 20355 18786.551 vw 20150 18787.007 vw 20150 18788.844 vw 20425 18789.905 m 20408 18790.036 w 20408 18791.120 vw 20408 18791.277 vw 20237 18791.505 vw 20237 18791.821^c m 20237 18793.540 vw 20408 18794.478^c w 20408 18794.658 m 20408 18795.722 vw 20408 18795.880 vw 20408 18796.439 vw 20408 18796.882 vw 20408 18797.188 vw 20333 18797.806 vw 20408 18797.914 m 20408 18798.768 vw 20408 18799.024 vw 20408 18799.123 vw 20408 18799.293 vw 20408 18799.326 vw 20408 18802.006 vw 20284 18802.498 w 20284 18802.544 w 20284 18802.671 s 20309 18802.713 s 20309 18802.789 vw 20309 18803.378 vw 20303 18803.517 vw 20303 18803.655 vw 20303 18807.027 vw 20455 18808.598 m 20339 18808.607 vw 20455 18808.754 vw 20450 18808.790 w 20339 18808.800 w 20450 18808.969^c vw 20450 18810.169 vw 20450 18810.683 vw 20450 18812.401 vw 20453 18812.621 vw 20453 18814.602 w 20444 18814.777 vw 20444 18816.476 w 20444 18816.664 w 20444 18817.634 vw 20389 18817.751 vw 20389 18817.809 vw 20389 18818.224 vw 20389 18818.267 vw 20183 18818.282 vw 20389 18821.108 w 20099 18821.180 vs 20099 18821.385 w 20099 18821.797 vw 20444 18824.583 vw 20356 18824.743 m 20356 18824.929 vw 20356 18824.943 vw 20289 18825.077 m 20356 18825.324 vw 20289 18825.446 m 20289 18825.997 vw 20444 18826.356 vw 20444 18829.408 vw 20375 18832.270 vs 20444 18832.355 m 20444 18832.471 vw 20453 18833.637 vw 20416 18834.524 vw 20453 18834.575 vw 20453 18834.999 vw 20453 18835.010 vw 20453 18835.158 vw 20436 18836.329 vw 20436 18837.395 w 20394 18837.743 vw 20394 18837.975 m 20394 18839.119 vw 20436 18839.641 vw 20436 18840.871 w 20436 18841.659 w 20436 18841.970 w 20436 18843.003 w 20436 18844.465 vw 20436 18845.554 vw 20433 18845.807 w 20433 18846.936 vw 20433 18848.531 m 20433 18850.884 vw 20433 18852.235 vw 20433 18852.655 vw 20433 18853.818 w 20425 18854.193 w 20425 18854.498 vw 20389 18857.047 vw 20503 18857.871 vw 20358 18858.042 vw 20375 18858.395 vw 20439 18860.212 vw 20292 18860.305 vw 20292 18860.411 vw 20292 18860.969 vw 20433 18861.447 vw 20433 18861.614 vw 20433 18862.121 vw 20433 18862.722 vw 20433 18863.121^c vw 20375 18863.431 vw 20375 18863.495 vw 20375 18864.324 vw 20433 18865.167 vw 20433 18865.262 vw 20433 18867.034 vw 20433 18867.848^c vw 20433 18868.911 vw 20433 18869.328 vw 20433 18870.678 vw 20433 18870.930 m 20433 18871.052 w 20433 18871.314 vw 20433 18871.713 vw 20433 18875.935 vw 20433 18880.035 vw 20447 18884.491 vw 20433 18884.729 vw 20433 18884.929 vw 20447 18885.601 vw 20447 18888.365 vw 20333 18888.409^c vw 20333 18888.684 vs 20356 18891.237 w 20356 18891.455^c w 20356 18892.013 m 20408 18898.271 vw 20456 18903.728 vw 20453 18903.832 vw 20453 18903.999 m 20453 18904.086 m 20453 18908.356 vw 20450 18909.353 vw 20450 18909.428 vw 20450 18910.560 vw 20450 18910.764 m 20450 18910.955 m 20450 18911.716 vw 20450 18912.056 vw 20450 18913.164 w 20450 18913.206 vs 20450 18913.253 vs 20450 18916.059 vw 20453 18916.117 vw 20453 18923.631 vw 20375 18924.323 vw 20439 18924.570 vw 20439 18924.826 vw 20439 18925.606 vw 20339 18925.897 vw 20425 18926.111 vw 20425 18926.813^c w 20439 18926.953 vw 20439 18927.347 vw 20436 18927.715 m 20433 18930.805 vw 20433 18930.927 vw 20433 18931.296 vw 20433 18935.085 vw 20416 18935.161 vw 20416 18937.693 vw 20436 18965.861 vw 20455 18965.929 vw 20455 18975.488 vw 20439 18975.558 vw 20446 18985.191^c vw 20453 18985.224 vw 20425 18990.133^c m 20436 19010.039 vw 20436 19010.322 vw 20436 ^a Intensities should not be taken to reflect the true line strength due to the limitations involved with the use of the monochromator as a variable band pass filter. ^b Monochromator gives the wavenumber to which the monochromator was set when the line was seen with its greatest intensity, this intensity being shown in the I column as very strong, strong, medium, weak and very weak. ^c Features which correspond to these lines are identifiable in the high temperature spectrum recorded by McCormack and O'Connor (Astron. Astrophys. Suppl. 26, 373-380 (1976)). It is interesting to note that most of the unassigned lines, including the strongest, are not recorded in the high temperature spectrum.