Variable sheet:
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St Input Name Output Unit Comment
324.7 Wo nm wavelength of line center
fo 92392.978 cm-1 frequency of line center
3000 T ¡K Temperature
63.5 A amu atomic weight of atom
28 M amu molecular weight of collider
220 sigmaa A2 cross section, defined as ¹r^2 (square A)
DLaColl 1.0878596 pm adiabadic collision width (wavelength)
DNuColl 3.09549E9 sec-1 adiabadic collision width (frequency)
DLaDop 1.5973406 pm Doppler width (wavelength)
DNuDop 4.54521E9 sec-1 Doppler width (frequency)
DLaVoi 2.231341 pm Voigt width (wavelength)
a .56700649 a parameter or damping factor
N 2.445E18 cm-3 number density of colliders (cm-3)
1 P atm Pressure of colliders
µ 19.431694 amu Reduced mass of atom-collider pair
v 180792.48 cm/sec Mean velocity of atom-collider pair
shift 2.21106E9 sec-1 red shift
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Rule sheet.
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c=3e10 "Speed of light, cm/sec
k=1.38E-16 "Boltsmann's constant, erg/K
R=83140000 "Gas constant, ergs/mol/K
DNuDop=3E10*DLaDop/(Wo*Wo)
DNuDop=(1/Wo)*Sqrt(ln(2))*Sqrt((8*R*T)/A)
Wo*fo=3E10
DNuColl=v*sigmaa*N/Pi()
DNuColl=3E10*DLaColl/(Wo*Wo)
N=.001*6.022e23*P/(T*0.0821)
a=DNuColl*Sqrt(ln(2))/DNuDop "Definition of a parameter or damping factor
µ=1/(1/A+1/M) "Reduced mass of atom-collider pair, amu
v=Sqrt(8*R*T/(Pi()*µ)) "mean velocity of atom-collider pair, cm/sec
DLaVoi=DLaColl/2+Sqrt((DLaColl/2)^2+DLaDop^2)
shift=DNuColl/1.4
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