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arXiv 1809.02706nucl-exnucl-th
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高达60 MeV的氘诱导Cr反应的一致性解释

Consistent account of deuteron-induced reactions on Cr up to 60 MeV

E. Simeckova, M. Avrigeanu, U. Fischer, J. Mrazek, J. Novak, M. Stefanik, C. Costache, V. Avrigeanu

摘要:

目的:天然铬靶低能氘致反应截面的新的精确测量可以增强相关的数据库,并有机会对所涉及的反应机制进行统一和一致的解释。研究方法:利用捷克科学院核物理研究所(NPI CAS)加速器和核分析方法中心(CANAM)的U-120 M回旋加速器,采用叠箔技术和高分辨率γ谱仪,测量了能量达20 MeV的氘入射到天然Cr上时,$^{51,52,54}$ Mn、$^{51}$ Cr和$^{48}$ V核的活化截面。他们以及以前可用的数据与铬同位素的相互作用高达60兆电子伏的所有过程的扩展分析的对象,从弹性散射,直到从完全平衡的化合物系统的蒸发,但特别注意的BU和DR机制。结果如下:新测得的活化激发函数被证明是充实氘核数据库的必要条件,虽然对所有可用数据的理论分析首次加强了它们的一致性解释,但前提是:(i)通过以下方式完成了适当的BU和DR评估:(ii)对PE和CN贡献的假设进行了校正,以减少总量-反应截面,这是由于初始氘核通量向BU和DR过程的泄漏。结论:适当的描述内涉及的核机制氘引起的反应铬,特别是考虑到BU和DR直接过程,验证了计算和测量的截面,特别是在低能量的新的实验数据的整体协议。

英文摘要:

Purpose: Accurate new measurements of low-energy deuteron-induced reaction cross sections for natural Cr target can enhance the related database and the opportunity for an unitary and consistent account of the involved reaction mechanisms. Methods: The activation cross sections of $^{51,52,54}$Mn, $^{51}$Cr, and $^{48}$V nuclei for deuterons incident on natural Cr at energies up to 20 MeV, were measured by the stacked-foil technique and high resolution gamma spectrometry using U-120M cyclotron of the Center of Accelerators and Nuclear Analytical Methods (CANAM) of the Nuclear Physics Institute of the Czech Academy of Sciences (NPI CAS). They as well as formerly available data for deuteron interactions with Cr isotopes up to 60 MeV are the object of an extended analysis of all processes from elastic scattering until the evaporation from fully equilibrated compound system, but with a particular attention given to the BU and DR mechanisms. Results: The new measured activation excitation functions proved essential for the enrichment of the deuteron database, while the theoretical analysis of all available data strengthens for the first time their consistent account provided that (i) a suitable BU and DR assessment is completed by (ii) the assumption of PE and CN contributions corrected for decrease of the total-reaction cross section due to the leakage of the initial deuteron flux towards BU and DR processes. Conclusions: The suitable description of nuclear mechanisms involved within deuteron-induced reactions on chromium, taking into account especially the BU and DR direct processes, is validated by an overall agreement of the calculated and measured cross sections including particularly the new experimental data at low energies.

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