[mesa-users] nuclear reaction rates - n14pg and 3a

[Christoph Langer]

Hi Jakub,

if you want to make sure that your reaclib file (for the current MESA 
release) contains the correct rates,
just go to the rates directory in data/rates_data and search for the 
jina_reaclib_results file.

Then use

*grep 'p  n14' jina_reaclib_results**

to find a few lines with:

*p  n14  o15                       im05n     7.29680e+00 *

This describes the reaction 14N(p,g)15O with the label im05, which 
stands for Imbriani et al.,
with a Q-value of 7.29680e+00 MeV.

The same for the triple-alpha rate:

*grep 'he4  he4  he4' jina_reaclib_results**

Then you will find (a few lines):

*he4  he4  he4  c12                  fy05r     7.27500e+00*

Again, the label is fy05, which is Fynbo et al.


But it shouldn't have changed from previous MESA releases.


Greetings,
Christoph




On 11/13/2014 11:32 AM, Jakub Ostrowski wrote:
> Hi Christoph,
>
> This is basically what I needed to now. Thank you!
>
> Cheers,
> Jakub
>
>> On 13 Nov 2014, at 16:48, Christoph Langer <langer at nscl.msu.edu 
>> <mailto:langer at nscl.msu.edu>> wrote:
>>
>> Hi Jakub,
>>
>> the current 14N(p,g) rate in the reaclib database is still taken from 
>> G. Imbriani et al. ( European Physics Journal A 25 (2005)).
>> The 3a reaction in reaclib is from H.O.U. Fynbo et al. (Nature 433, 
>> 136-139 (2005)).
>>
>> So I guess, the rates should be the same as in the previous version.
>>
>> The JINA reaclib database provides the option to download different 
>> sets of rates. This gives you more flexibility.
>>
>> Cheers,
>> Christoph
>>
>>
>> On 11/13/2014 10:32 AM, Jakub Ostrowski wrote:
>>> Hi,
>>>
>>> A couple of stable releases ago an option ‘Imbriani’ has been removed from set_rate_n14pg and ‘Fynbo’ has been removed from set_rate_3a. Instead of these there is now possibility to choose ‘jina reaclib’. The question is: are these new rates from jina the same as ‘Imbriani’ and ‘Fynbo’ or are they different?
>>>
>>> Cheers,
>>> Jakub
>>>
>>>
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-- 
<< Christoph Langer >>
Research Associate
National Superconducting Cyclotron Laboratory
Michigan State University
640 South Shaw Lane
East Lansing, MI 48824
Phone: 517-908-7239
Fax:   517-353-5967

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