Isoelectronic sequences

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iso.nLevels[ipSEQUENCE][ipELEMENT] number of levels 
initialized in cddefines.c.  This is reset with
atom h-like levels command
atom he-like levels command

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opacity offset stack
iso.ipOpac[ipSEQUENCE][ipELEMENT][n]

long int ***ipIsoLevNIonCon;

float ***xIsoLevNIonRyd;

/* ConBoltz excit to continuum */
double ***ConBoltz/*ipISO][ipZ][n]*/;

/*
* iso.nLevels[ipISO][ipNELEM] is the number of levels in hydrogenic atoms, 
* 0 is 1s, 1 is 2s, 2 is 2p, etc, going up to n = iso.nLevels[ipHYDROGEN]
* iso.nLevels[ipHYDROGEN] is set on the fly with hydrogen levels command, and 
* all loops should be from ipH1s to <= iso.nLevels[ipHYDROGEN]
* it is initialized in zero.c
*/
/* the number of levels in each atom in the iso sequences */
long int nLevels[NISO][LIMELM];

/* the number of levels to print in each atom in the iso sequences */
long int nPrintLevels[NISO][LIMELM];

/* the statistical weights of the levels, stat[ipISO][n] */
float **stat;

/* the statistical weights of the ions for each species,
 * used for Milne relation and recombination */
float stat_ion[2];

/* radiative recombination rate coefficients, recom[ipISO][ipZ][n][fcn] */
float ****recom;

/* difference between actual case b photons in rtdiffuse, and correct case b */
float CaseBCheck[NISO][LIMELM];

/* case b recombination rate coefficient */
float CaseBradrec[NISO][LIMELM];

/* ipOpac pointers for photoionization cross sections of hydrogen
	* iso.ipOpac[NISO][LIMELM][NHPLPHOT] */
long int ***ipOpac;

/* population of level relative to ion */
float ***Pop2Ion;

/* departure coefficient */
double ***DepartCoef;
