Study of Positronium in Insulating Crystals

在绝缘材料形式中被注射到一种类似氢的边界状态，一种被称为正态的电子。沉积材料在绝缘材料中的行为在与异常特性的关系中具有吸引力。它也是真实的，作为材料自旋状态的探针。目前的研究揭示了与材料一起使用的2D-ACAR设备的各种方面，最近由我们开发的，KEK的高强度缓慢Positron光束线，以及常规Positron抑制技术，包括1D-ACAR、Positron生命周期、多普勒衰减辐射的传播，新的结果已被发现用于以下主题：（1）在低温度下的alkali halides中的离散位置的波函数。（2） Effect of the phonon scattering on the momentum distribution of positronium in quartz and MgFイイD22イエD2。（3）将独立位置的隧道过渡到一个自本地状态。（4）正态发射来自石英单晶体和荧光硅。（5） Positronium lifetime in Quartz single crystal。（6）对自旋交叉材料和相关材料的研究，使用正态材料。（7）anistoropic crystals中的正态四极相互作用。（8）通过在固体中使用正态来开发正态自旋极化仪。

A positron injected in insulating material form a hydrogen-like bound state with an electron called positronium. Behavior of ositronium in insulating materials has attracted interests in relation with the properties of excitions. It is also realized as a probe of the spin states of materials.The present study revealed various aspects of the positronium interactions with materials by using 2D-ACAR apparatus recently developed by us, the high intensity slow positron beam line at KEK, and conventional positron annihilation techniques including 1D-ACAR, positron lifetime ,Doppler broadening of annihilation radiation, positron age-momentum correlation.New results have been obtained for the following subjects :(1) Wave functions of delocalized positronium in alkali halides at low temperatures.(2) Effect of the phonon scattering on the momentum distribution of positronium in quartz and MgFィイD22ィエD2.(3) Tunneling transition of delocalized positronium to a self-localized state.(4) Positronium emission from quartz single crystal and fused silica.(5) Positronium lifetime in quartz single crystal.(6) Study of spin-crossover material and related material by using positronium.(7) Positronium quadrupole interactions in anistoropic crystals.(8) Development of positron spin polarimeter by using positronium in solids.