[mesa-users] net_iso?

[Aaron Dotter]

Hi Jing,

chem_id refers to the position of a given isotope in the isotopes.data_*
file in mesa/data/chem_data/.  You can print out the isotope's name from
chem_id by using:

chem_isos% name(s% chem_id(j))


Aaron



On Sun, Mar 11, 2012 at 8:08 PM, <jingluan at caltech.edu> wrote:

> Hello :-)
>
> I am confused with the returned values of s% net_iso(s% chem_id(j))
> (j=1,...,s% species);
>
> I ask mesa to print out these information:
>
> 'chem_check,j'  j  s% chem_id(j), s% net_iso(s% chem_id(j)), s% xa(j,1)
>  chem_check,j   1      2             1                        0.71
>  chem_check,j   2      3             2                        2E-005
>  chem_check,j   3      5             3                        2E-005
>  chem_check,j   4      6             4                        0.27
>  chem_check,j   5      13            5                        1.25E-008
>  chem_check,j   6      18            6                        1.E-099
>  chem_check,j   7      26            7                        1.E-099
>  chem_check,j   8      38            8                        4.1E-003
>  chem_check,j   9      51            9                        1.2E-003
>  chem_check,j   10     69            10                       1.1E-002
>  chem_check,j   11     114           11                       2.5E-003
>  chem_check,j   12     168           12                       9.5E-004
>
> I am confused by column 3: s% chem_id(j). From the initial abundance
> setting, I can figure out chem_id(1)=2 stands for h1, chem_id(2)=3 stands
> for h2, chem_id(3)=5 for he3, chem_id(4)=6 for he4. But how about
> chem_id=13,18,26,38,51,69,114,168? What isotopes do they stand for please?
> I know that I should refer to mesa/chem/public/chem_def.f, but I could not
> figure out which part of this file explains the correspondence between
> isotope name and the value of chem_id(j).
>
> Thank you very much!!
>
> Sincerely,
> Jing
>
>
>
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