(d, 3He) reaction on an odd-neutron nuclear target for the formation of deeply bound pionic atoms
(d, 3He) reaction on an odd-neutron nuclear target for the formation of deeply bound pionic atoms
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奇数中子核靶上的 (d, 3He) 反应形成深度束缚的介子原子
DOI：
10.1093/ptep/ptt035
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发表时间：
2013
影响因子：
3.5
通讯作者：
S. Hirenzaki
中科院分区：
文献类型：
--
作者：
N. Ikeno;J. Yamagata-Sekihara;H. Nagahiro;S. Hirenzaki
本文考虑了迄今尚未有人研究过的奇中子核靶上（He）反应的π原子能谱。在奇中子核靶上的（He）反应中，我们可以观察到自旋宇称的偶中子核中的π介子态。我们预计，这些介子态不会有额外的位移，由于中子-空穴和介子态之间的剩余相互作用的影响。对于偶中子核靶的情况，我们可能必须考虑剩余相互作用效应，才能从高精度的实验数据中精确地推导出π介子态的结合能，因为最终的π介子态是π介子-粒子加中子-空穴[π <$n − 1]态。因此，除了拓宽领域的π原子光谱的核图表，目前的研究（He）反应的奇中子目标被认为是重要的推导出非常精确的信息上观察到的π态的结合能，并澄清π的性质和方面的对称性强相互作用在有限密度。本文对偶偶核靶情形的公式进行了修正，研究了偶奇核靶上π原子的生成谱，并给出了Sn靶情形的数值计算结果。该实验将于不久的将来在RIBF/RIKEN进行。
We consider pionic atom spectroscopy by the (He) reaction on an odd-neutron nuclear target in this article, which has not yet been investigated. In the (He) reaction on the odd-neutron nuclear target, we can observe pionic states in the even-neutron nucleus with spin-parity. We expect that these pionic states do not have additional shifts due to the effects of the residual interaction between neutron-hole and pionic states. For the even-neutron nuclear target cases, we may have to take into account the residual interaction effects to deduce the binding energies of the pionic states precisely from the high-precision experimental data, since the final pionic states are pion-particle plus neutron-hole [π⊗n−1] states. Thus, in addition to widening the domain of pionic atom spectroscopy on the nuclear chart, the present study of the (He) reaction on an odd-neutron target is considered to be important to deduce extremely precise information on the binding energies of the observed pionic states, and to clarify the pion properties and aspects of the symmetries of the strong interaction at finite density. We modify the formula of the even–even nuclear target case to study pionic atom formation spectra on the even–odd nuclear target and show the numerical results of theSn target case. This experiment will be performed at RIBF/RIKEN in the near future.