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arXiv 0810.1369nucl-th
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核子阈区附近直接碎裂反应对中微子在$^{12}$ C上散射的作用

Roles of Direct Break-up Reaction on Neutrino Scattering off $^{12}$C near Nucleon Threshold Region

K. S. Kim, Myung-Ki Cheoun

摘要:

中微子(反中微子)在$^{12}$ C上的散射是轻核核合成中$ν$ -过程的重要关键反应之一。大多数中微子-核散射被认为是通过间接过程的能量范围从几个到几十个MeV。目标核被入射中微子(反中微子)激发,通过各种跃迁,随后衰变成其他核与发射粒子。但是,直接的过程也是可行的,即入射中微子(反中微子)直接从靶核中剥离一个核子。因此,除了间接过程外,直接过程可能影响$^{11}$ C和$^{11}$ B的丰度。本文研究了在释放一个核子的能区附近,中微子(反中微子)在$^{12}$ C上的直接准弹性散射,并讨论了直接过程在核合成中的意义。如果考虑末态相互作用,直接过程可能与间接过程相当。

英文摘要:

Neutrino (antineutrino) scattering off $^{12}$C is one of various important key reactions for $ν$-process in the nucleosysnthesis of light nuclei. Most of neutrino-nucleus scattering are considered through indirect processes within the energy range from a few to tens of MeV. Target nuclei are excited by incident neutrino (antineutrino) through various transitions, and subsequently decay into other nuclei with emitting particles. But, direct processes are also feasible, in which incident neutrino (antineutrino) strips directly one nucleon from target nuclei. Consequently, direct processes may affect abundances of $^{11}$C and $^{11}$B additionally to indirect processes. We investigate direct neutrino (antineutrino) quasi-elastic scattering off $^{12}$C around the energy region liberating one nucleon and discuss implications of direct processes in the nucleosynthesis. The direct processes might be comparable to the indirect processes if the final state interaction is taken into account.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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