Fits to the rates of low-temperature dielectronic recombination.
H. Nussbaumer & P. J. Storey (A&A 126, 75; A&AS 64, 545; A&AS 69, 123).

Fit parameters for low-emperature dielectronic recombination rates.
Byte-per-byte description of file: hdr.dat (25 records)
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   Bytes Format  Units   Label        Explanations
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   1-  2  I2     ---     Z            Atomic number
   4-  5  I2     ---     N            Number of electrons
   7- 14  F8.4   ---     a            Fit parameter
  16- 23  E8.2   ---     b            Fit parameter
  25- 32  E8.2   ---     c            Fit parameter
  34- 41  E8.2   ---     d            Fit parameter
  43- 50  E8.2   ---     f            Fit parameter
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   /alpha = 10**(-12)*(a/t+b+c*t+d*t**2)*t**(-3/2)*exp(-f/t) cm**3/s
        t = T[K]/10**4
Note that there are two entries for Z=8, N=8 and for Z=8, N=5:
1st -- T < 2*10**4 K
2nd -- T > 2*10**4 K