Pflüger Thomas, Zatsarinny Oleg, Bartschat Klaus, Senftleben Arne, Ren Xueguang, Ullrich Joachim, Dorn Alexander
Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311, USA.
Phys Rev Lett. 2013 Apr 12;110(15):153202. doi: 10.1103/PhysRevLett.110.153202. Epub 2013 Apr 9.
As a fundamental test for state-of-the-art theoretical approaches, we have studied the single ionization (2p) of neon at a projectile energy of 100 eV. The experimental data were acquired using an advanced reaction microscope that benefits from high efficiency and a large solid-angle acceptance of almost 4π. We put special emphasis on the ability to measure internormalized triple-differential cross sections over a large part of the phase space. The data are compared to predictions from a second-order hybrid distorted-wave plus R-matrix model and a fully nonperturbative B-spline R-matrix (BSR) with pseudostates approach. For a target of this complexity and the low-energy regime, unprecedented agreement between experiment and the BSR model is found. This represents a significant step forward in the investigation of complex targets.
作为对当前最先进理论方法的一项基本测试，我们研究了在100电子伏特的入射粒子能量下氖的单电离（2p）。实验数据是使用一台先进的反应显微镜获取的，该显微镜具有高效率以及近4π的大立体角接收范围的优势。我们特别强调在相空间的很大一部分上测量内部归一化三微分截面的能力。这些数据与二阶混合扭曲波加R矩阵模型以及具有赝态方法的完全非微扰B样条R矩阵（BSR）的预测结果进行了比较。对于这样复杂的靶以及低能区域，实验与BSR模型之间发现了前所未有的一致性。这代表了在复杂靶研究方面向前迈出的重要一步。
