کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8133432 | 1523416 | 2016 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Calculating Formulae of Proportion Factor and Mean Neutron Exposure in the Exponential Expression of Neutron Exposure Distribution
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Calculating Formulae of Proportion Factor and Mean Neutron Exposure in the Exponential Expression of Neutron Exposure Distribution Calculating Formulae of Proportion Factor and Mean Neutron Exposure in the Exponential Expression of Neutron Exposure Distribution](/preview/png/8133432.png)
چکیده انگلیسی
Previous studies have shown that, for the three main stages of the development and evolution of asymptotic giant branch (AGB) star s-process models, the neutron exposure distribution (DNE) in the nucleosynthesis region can always be considered as an exponential function, i.e., ÏAGB(Ï) = C/Ï0 exp(âÏ/Ï0) in an effective range of the neutron exposure values. However, the specific expressions of the proportion factor C and the mean neutron exposure Ï0 in the exponential distribution function for different models are not completely determined in the related literature. Through dissecting the basic method to obtain the exponential DNE, and systematically analyzing the solution procedures of neutron exposure distribution functions in different stellar models, the general formulae, as well as their auxiliary equations, for calculating C and Ï0 are derived. Given the discrete neutron exposure distribution Pk, the relationships of C and Ï0 with the model parameters can be determined. The result of this study has effectively solved the problem to analytically calculate the DNE in the current low-mass AGB star s-process nucleosynthesis model of 13C-pocket radiative burning.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Astronomy and Astrophysics - Volume 40, Issue 3, JulyâSeptember 2016, Pages 322-339
Journal: Chinese Astronomy and Astrophysics - Volume 40, Issue 3, JulyâSeptember 2016, Pages 322-339
نویسندگان
Zhang Feng-Hua, Zhou Gui-De, Ma Kun, Ma Wen-Juan, Cui Wen-Yuan, Zhang Bo,