Measurement of Excitation Spectra in the 12C(p,d) Reaction near the eta' Emission Threshold
Measurement of Excitation Spectra in the 12C(p,d) Reaction near the eta' Emission Threshold
复制标题
eta 发射阈值附近 12C(p,d) 反应中激发光谱的测量
DOI：
10.1103/physrevlett.117.202501
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发表时间：
2018
影响因子：
8.6
通讯作者：
eta-PRiME/SuperFRS collaboration (Y.K.Tanaka et al.)
中科院分区：
文献类型：
--
作者：
Shane Drury;Thomas Blum;Masashi Hayakawa;Taku Izubuchi;Chris Sachrajda;Ran Zhou;eta-PRiME/SuperFRS collaboration (Y.K.Tanaka et al.)
在发射阈值附近的反应中测量了其激发光谱。从GSI同步加速器SIS-18上提取的入射能量为2.5GeV的质子束撞击碳靶。用碎片分离器(FRS)作为分光计，精确测量了0°处出射的氚动量。与碳核中可能存在深束缚中态的理论预测相反，没有观察到与束缚态形成相关的明显结构。对光谱进行分析，以对形成截面和迄今鲜为人知的原子核相互作用设置严格的约束。
Excitation spectra ofare measured in thereaction near theemission threshold. A proton beam extracted from the synchrotron SIS-18 at GSI with an incident energy of 2.5 GeV impinges on a carbon target. The momenta of deuterons emitted at 0° are precisely measured with the fragment separator (FRS) operated as a spectrometer. In contrast to theoretical predictions on the possible existence of deeply bound-mesic states in carbon nuclei, no distinct structures are observed associated with the formation of bound states. The spectra are analyzed to set stringent constraints on the formation cross section and on the hitherto barely known-nucleus interaction.