Resonant nuclear reaction 23Mg(p,γ) 24Al in strongly screening magnetized neutron star crust  

作　　者：刘晶晶 刘冬梅 

机构地区：[1]College of Marine Science and Technology, Hainan Tropical Ocean University, Sanya, Hainan 572022, China

出　　处：《Chinese Physics C》2017年第12期122-132,共11页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11565020);the Counterpart Foundation of Sanya(2016PT43);the Special Foundation of Science and Technology Cooperation for Advanced Academy and Regional of Sanya(2016YD28);the Scientific Research Starting Foundation for 515 Talented Project of Hainan Tropical Ocean University(RHDRC201701);the Natural Science Foundation of Hainan Province(114012)

摘　　要：Based on the relativistic theory of superstrong magnetic fields（SMF）, by using three models those of Lai（LD）, Fushiki（FGP）, and our own（LJ）, we investigate the influence of SMFs due to strong electron screening（SES） on the nuclear reaction 23Mg（p,γ） 24Al in magnetars. In a relatively low density environment（e.g., ρ7 〈0.01）and 1 〈 B12 〈 102, our screening rates are in good agreement with those of LD and FGP. However, in relatively high magnetic fields（e.g., B12 〉102）, our reaction rates can be 1.58 times and about three orders of magnitude larger than those of FGP and LD, respectively（B12, ρ7 are in units of 1012G, 107 g cm-3）. The significant increase of strong screening rate can imply that more 23Mg will escape from the Ne-Na cycle due to SES in a SMF. As a consequence,the next reaction, 24Al（＋β, ν） 24Mg, will produce more 24Mg to participate in the Mg-Al cycle. Thus, it may lead to synthesis of a large amount of A〉20 nuclides in magnetars.Based on the relativistic theory of superstrong magnetic fields（SMF）, by using three models those of Lai（LD）, Fushiki（FGP）, and our own（LJ）, we investigate the influence of SMFs due to strong electron screening（SES） on the nuclear reaction 23Mg（p,γ） 24Al in magnetars. In a relatively low density environment（e.g., ρ7 〈0.01）and 1 〈 B12 〈 102, our screening rates are in good agreement with those of LD and FGP. However, in relatively high magnetic fields（e.g., B12 〉102）, our reaction rates can be 1.58 times and about three orders of magnitude larger than those of FGP and LD, respectively（B12, ρ7 are in units of 1012G, 107 g cm-3）. The significant increase of strong screening rate can imply that more 23Mg will escape from the Ne-Na cycle due to SES in a SMF. As a consequence,the next reaction, 24Al（＋β, ν） 24Mg, will produce more 24Mg to participate in the Mg-Al cycle. Thus, it may lead to synthesis of a large amount of A〉20 nuclides in magnetars.

关 键 词：dense matter： nuclear reactions NUCLEOSYNTHESIS abundances stars： magnetic fields stars： magnetars 

分 类 号：P145.6[天文地球—天体物理]