thermonuclear19fp016oreactionrate
文献类型：期刊论文
| 作者 | He Jianjun5; Lombardo Ivano4; DellAquila Daniele3; Xu Yi2; Zhang Liyong5; Liu Weiping1 |
| 刊名 | chinesephysicsc
 |
| 出版日期 | 2018 |
| 卷号 | 042期号:001页码:015001 |
| ISSN号 | 1674-1137 |
| 英文摘要 | The thermonuclear^19F（p,α0）16O reaction rate in the temperature region 0.007–10 GK has been derived by re-evaluating the available experimental data, together with the low-energy theoretical R-matrix extrapolations.Our new rate deviates by up to about 30% compared to the previous results, although all rates are consistent within the uncertainties. At very low temperature（e.g. 0.01 GK） our reaction rate is about 20% lower than the most recently published rate, because of a difference in the low energy extrapolated S-factor and a more accurate estimate of the reduced mass used in the calculation of the reaction rate. At temperatures above ^1 GK, our rate is lower, for instance, by about 20% around 1.75 GK, because we have re-evaluated the previous data（Isoya et al., Nucl. Phys.7, 116（1958）） in a meticulous way. The present interpretation is supported by the direct experimental data. The uncertainties of the present evaluated rate are estimated to be about 20% in the temperature region below 0.2 GK,and are mainly caused by the lack of low-energy experimental data and the large uncertainties in the existing data.Asymptotic giant branch（AGB） stars evolve at temperatures below 0.2 GK, where the^19F（p,α）16O reaction may play a very important role. However, the current accuracy of the reaction rate is insufficient to help to describe, in a careful way, the fluorine over-abundances observed in AGB stars. Precise cross section（or S factor） data in the low energy region are therefore needed for astrophysical nucleosynthesis studies. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/42511]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国原子能科学研究院 2.Extreme Light Infrastructure - Nuclear Physics 3.Dip. di Fisica, Univ. di Napoli Federico II 4.INFN - Sezione di Catania 5.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | He Jianjun,Lombardo Ivano,DellAquila Daniele,et al. thermonuclear19fp016oreactionrate[J]. chinesephysicsc,2018,042(001):015001. |
| APA | He Jianjun,Lombardo Ivano,DellAquila Daniele,Xu Yi,Zhang Liyong,&Liu Weiping.(2018).thermonuclear19fp016oreactionrate.chinesephysicsc,042(001),015001. |
| MLA | He Jianjun,et al."thermonuclear19fp016oreactionrate".chinesephysicsc 042.001(2018):015001. |
入库方式： OAI收割
来源：国家天文台
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