TABLE 3. Hydrogen emission coefficients for a one atmosphere plasma in LTE. Column 5. - Ratio of Hquasi continuum to column 6. Column 6.- Sum of continuous emission coefficients of hydrogen in watts cm -3 steradians-1 cm-1. Column 7.- Sum of the hydrogen line wings in watts cm-3 steradians-1 cm-1. The number at the right of the values in columns 6 and 7 is the power of 10 which multiplies the entry. The estimated accuracy of column 6 is ±2 percent from 1700 Å to 8000 Å unless column 7 is greater than 15 percent of column 6. For this condition and for wavelengths outside this range a larger uncertainty must be placed on the total continuous emission coefficient. TABLE 3. Hydrogen emission coefficients for a one atmosphere plasma in LTE - Continued 3520 .478 .458 .064 3540 .481 .456 .063 5100 5200 5300 5400 5500 .059 .057 .874 .874 5600 5700 .000 4.9413+03 .000 4.9979+03 3560 .483 .455 .062 .000 5.0540+03 3580 .486 .453 .061 .000 5.1097+03 .051 .874 .075 .000 3.0444+03 .053 .874 .073 .000 3.0182+03 .055 .874 .071 .000 2.9885+03 9.9801-01 11800 .070 .000 2.9558+03 7.3808-01 11900 .068 .000 2.9204+03 6.0207-01 12000 .061 .873 .066 .000 2.8827+03 5.3275-01 12100 .063 .872 .065 .000 2.8431+03 5.0986-01 12200 .065 .872 .064 .000 2.8020+03 5.3042-01 12300 .067 .871 .062 .000 2.7592+03 6.0605-01 12400 .061 .000 2.7152+03 7.7150-01 12500 .071 .869 .060 .000 2.6707+03 1.1164+00 12600 6200 .073 .868 .059 .000 2.6253+03 1.8988+00 12700 6300 .076 .866 .058 .000 2.5791+03 4.0660+00 12800 6400 .078 .865 .057 .000 2.5324+03 1.3119+01 12900 .080 .863 .057 .000 2.4852+03 1.3603+02 13000 .083 .861 .056 .000 2.4374+03 4.8694+02 13100 .860 .055 .000 2.3896+03 1.9967+01 13200 .087 .858 .055 .000 2.3419+03 5.1665+00 13300 .090 .856 .054 .000 2.2941+03 2.1791+00 13400 .092 .854 .053 .000 2.2464+03 .865 .046 .000 .862 .046 .000 .000 .097 .857 .046 .000 11500 .099 .855 .046 .000 6.7205+02 1.4837+01 6.5212+02 4.5196+00 6.3277+02 2.0994+00 6.1429+02 1.2359+00 5.9607+02 8.4811-01 .119 .835 .122 .832 .046 .000 4.6901+02 1.2792+00 .125 .829 .046 .000 4.5527+02 2.0913+00 .128 .826 .046 .000 4.4198+02 4.0586+00 .131 .823 .046 .000 4.2913+02 1.0493+01 .134 .819 .046 .000 4.1669+02 5.0046+01 .138 .816 .047 .000 4.0467+02 4.4947+03 .141 .812 .047 .000 3.9305+02 1.2933+02 .144 .809 .047 .000 3.8182+02 1.6658+01 .148 .805 .047 .000 3.7094+02 5.4450+00 .151 .802 .047 .000 3.6044+02 2.5431+00 .155 .798 .047 .000 3.5030+02 1.4333+00 .794 .047 .000 3.4052+02 9.0749-01 .047 .000 3.3108+02 6.2216-01 4.8320+02 8.8497-01 (a) If continuum The Arat term in the square brackets coefficient [6] as represents the contribution from the If continuum [13] with hudh density corrections according to reference FX, Taa H2 }+α (H; }\g [1-exp-c2T BAT (3) 110) No is the electron density tem 5), T is the tem perature (K), A is the wavelength (cm), C, is the second radiation constant ( 14:879 cm K), E, is the ionization potential of hydrogen, AE, is the lowering of the Konization potential given by AE, -eip, [10], where po [KXWwe^N 1^, vis and yis are the free free and Free bound Gaunt factors respectively [11] averaged over a Maxwellian velocity distribution, and n is the upper state principal quantum number. The summatron is bikea from a value of a defined by to's unless high density corrections require a lower cutoff When the high density correction allows 4- to all free bound transitions are approximately taken into account by integrating 1/n2 exp (E\/n2kT)_ from # 10 to # # where # is the quantum number of the last energy level below E, AE, i.e., #max > (8/A&) and replacing You - Yi (n−15). If high density corrections require #max 15 then the term multiplied by you in omitted. The averaged tree free and free bound Gaunt factors obtamed from reference [14] are tabulated in tables 1 and 2 respectively. This tabulation is done so the Gaunt factors can be easily obtained for a given wavelength and temperature. (b) N continuum. The term contaming G(A, T) represents the contribution from the H continuum, where Vis the density of neutral hydrogen. G(A, T') n given in terms of the tree bound and free free H dsorption coechcients 13, 4 of an This transition is the only important contribution to the quasi-molecular hydrogen continuum for wavelengths larger than 1700 A. Below this wavelength, quasi-molecular continuum contributions arise from other molecular states [16]. These are not considered here since the available data are incomplete and of uncertain reliability. (e) Other possible continuum contributions: Contributions from other species are estimated to be insignificant for the stated conditions, e.g., H (11) A forbidden continuum resulting from H has also been hypothesized [17], and should occur principally in the near-infrared. A more recent paper [18] states that this continuum is significant only for electron densities of roughly 10 cm3 which is three orders of magnitude above the highest density considered in this calculation. Contributions from lines superimposed on the conmaum. The intensity from the wings of Starkbroadened Wydrogen ines makes a non-negüighe 34 inter densities in certain spectrai "is ontribution must be included as on purus emission from avdrogen in egas Extensive caculations of n egres neiuding the wings for -man and Baimer speci 20, 21). The far wins t ཟ* ༦༦ TABLE 1. Free-free Gaunt factors λ in Ang Temperature in K stroms 8000 10500 11000 8500 9000 9500 10000 11500 12000 12500 13000 13500 14000 14500 15000 15500 16000 1.1400 1.1415 1.1431 1.1424 1.1441 1.1458❘ 1.1476 3000 1.1208 1.1228 1.1247 1.1267 1.1287 1.1306 1.1326 1.1345 1.1364 1.1383 1.1402 1.1421 1.1440 1.1459 1.1478 1.1497 1.1515 1.1535 1.1558 1.1850 1.1887 1.1925 1.1962 1.1920 1.1961 1.2001 1.2041 1.2081 |