Title: Revisiting the Formation of HeH^+ in the Planetary Nebula NGC 7027  
Authors: R. C. Forrey, J. F. Babb, E. D. S. Courtney, R. McArdle, P. C. Stancil 
Table: He+ + H radiative association rate coefficients
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Byte-by-byte Description of file: datafile1.txt
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   Bytes Format Units       Label  Explanations
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   1-  8 F8.1   K           T      Temperature 
  10- 15 F6.3   10-15cm3/s  k      LTE rate coefficient       
  17- 21 F5.3   10-15cm3/s  k      NLTE-ZDL rate coefficient
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Notes: (1) LTE = local thermodynamic equilibrium;
       (2) NLTE-ZDL = non-LTE zero-density limit 
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     1.0 61.000 1.418 
     2.0 24.650 1.527
     3.0 14.775 1.605
     4.0 10.525 1.610
     5.0  8.225 1.578
     6.0  6.775 1.538
     7.0  5.800 1.495
     8.0  5.100 1.455
     9.0  4.550 1.417
    10.0  4.125 1.383
    20.0  2.255 1.140
    30.0  1.640 0.995
    40.0  1.330 0.898
    50.0  1.140 0.825
    60.0  1.013 0.768
    70.0  0.918 0.723
    80.0  0.845 0.685 
    90.0  0.790 0.653 
   100.0  0.743 0.625
   200.0  0.513 0.470
   300.0  0.425 0.400
   400.0  0.375 0.360 
   500.0  0.345 0.333
   600.0  0.322 0.313
   700.0  0.305 0.298
   800.0  0.293 0.285
   900.0  0.280 0.278
  1000.0  0.273 0.268
  2000.0  0.231 0.229
  3000.0  0.218 0.217
  4000.0  0.214 0.214
  5000.0  0.214 0.214
  6000.0  0.216 0.215
  7000.0  0.219 0.218
  8000.0  0.223 0.222
  9000.0  0.227 0.226
 10000.0  0.231 0.230
 20000.0  0.273 0.273
 30000.0  0.305 0.303
 40000.0  0.323 0.323
 50000.0  0.330 0.328
 60000.0  0.328 0.328
 70000.0  0.320 0.320
 80000.0  0.310 0.310
 90000.0  0.300 0.298
100000.0  0.285 0.285
200000.0  0.178 0.178
300000.0  0.119 0.119
400000.0  0.086 0.086
500000.0  0.066 0.066
600000.0  0.053 0.052
700000.0  0.043 0.043
800000.0  0.036 0.036
900000.0  0.031 0.031