High resolution hypernuclear spectroscopy using the (e,e'K+) reaction
High resolution hypernuclear spectroscopy using the (e,e'K+) reaction
复制标题
使用 (e,eK ) 反应的高分辨率超核光谱
DOI：
10.1103/physrevlett.90.232502
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发表时间：
2002
影响因子：
8.6
通讯作者：
E. al.
中科院分区：
文献类型：
--
作者：
Hnss Collaboration;T. Miyoshi;E. al.
新加速器设施中的高能连续波电子束可实现电磁产生和超核结构的精确研究，我们在此报告第一个实验，证明 (e,e'K+) 反应的有用性。该实验也是第一个利用电子以大约零度散射时可用的增强虚拟光子通量的实验。 12B（超核）光谱的观测分辨率约为 900 keV，是迄今为止使用磁谱仪获得的最佳分辨率。主要激发的位置与理论预测和之前的结合能测量一致。
High energy CW electron beams at new accelerator facilities allow electromagnetic production and precision study of hypernuclear structure, and we report here on the first experiment demonstrating the usefulness of the (e,e'K+) reaction. This experiment is also the first to take advantage of the enhanced virtual photon flux available when electrons are scattered at approximately zero degrees. The observed resolution, ~900 keV, of the 12B(hypernuclear) spectrum is the best yet attained using magnetic spectrometers. The positions of the major excitations are in agreement with theoretical predictions and the previous binding energy measurements.