title h_caseb_n8 high density case B
c
c commands controlling continuum =========
black body, T = 2.e5 K
ionization parameter -1
c
c commands for density & abundances =========
hden = 8
init file="honly.ini"
c
c commands controlling geometry  =========
stop zone 1
set dr 0
c
c other commands for details     =========
c this will not affect the main model, but will test CR heating rate
cosmic ray background
case b hummer no photoionization no Pdest 
no scattering escape
no induced processes (OK)
constant temperature = 20000
iterate 
atom h-like resolve levels 20
c
c commands controlling output    =========
normalize to "Ca B" 4861
save overview "limit_caseb_h_n8.ovr"
save performance "limit_caseb_h_n8.per"
save results "limit_caseb_h_n8.rlt"
save ionizing continuum "limit_caseb_h_n8.cion"
save monitors "limit_caseb_h_n8.asr"
c
// >>chng 11 nov 16, from 0 to 0, adjust newmole monitors
// >>chng 12 jul 01, from 0 to 0, update Badnell DR to 13-electron iso sequence
monitor case b h-like element hydrogen 010 range 1000A to 40000A
// >>chng 11 nov 16, from -18 to -11.21, adjust newmole monitors
monitor csupra -11.21 error 0.1
c
c limit_caseb_h_n8.in
c class limit 
c ========================================
c 

This test case compares the predictions of the multi-level hydrogen atom
with the Storey and Hummer (1995) results.  The set dr command sets the
zone thickness to 1 cm.  The case b command sets Lyman line optical depths
to very large values. 
Checks:
-	Neutral fractions
-	H* emissivity
-	Relative line intensities

high density causes disagreemeent with HS - collisions