Basis Subroutine and System Specific Parameters: Collisions between a ¹Delta Molecule and a Spherical Atom

System subroutine: sy1del

Basis subroutine: hiba1del.f

NTERM (the number of potential surfaces involved: this should be 2 in this case). This parameter can not be changed

NPAR: number of lambda-doublet components included

If NPAR = 1, just = +1 states are included
If NPAR .ne. 1, both = +1 and = - 1 states are included


JMAX: maximum rotational quantum number

IGU: inversion symmetry of states included in expansion.

IGU = +1 for gerade states
IGU = -1 for ungerade states
for heteronuclear molecules IGU should be +1

ISA: Nuclear permutation symmetry (s/a label) of states included in the expansion.

If the flag IHOMO is .TRUE., then only s states will be included if ISA = +1 and only a states if ISA = -1

BROT: rotational constant
Q: lambda-doubling constant

line 1: JMAX, IGU, ISA, NPAR

line 2: BROT, Q