Experimental comparison of performances of ultracold neutron gravity spectrometers

超冷中子重力谱仪性能实验比较

基本信息

批准号：
03044079
负责人：
UTSURO Masahiko
金额：
$ 1.92万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1991
资助国家：
日本
起止时间：
1991 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03044079/
关键词：
Very high resolutions Scattering angle analyses Dynamical structure Neutron optical effects Spin echo spectrometer Small angle arrangement

项目摘要

The characteristic performances of the fall focusing gravity spectrometer with ultracold neutrons developed in our Institute were investigated to be the high resolutions for both of the energy transfer and of the momentum transfer, about 10^<-8> eV and about 10^<-3> A^<o-1>, respectively. These very high resolutions are not attained with any other single machine of neutron spectrometers, but recently a new type of spin echo spectrometer is going to be developed applied with the method of small angle arrangements which should also show similar performances with the present device.Our fall focusing spectrometer gives the possibility of measurements of various scattering angles simultaneously, which was not possible with the conventional reach focusing gravity spectrometer. This property of scattering angle analyses is very much useful for studying, for example, dynamics of diffusing samples. In the next place, the Characteristic performances of our spectrometer compared to the new type of the small angle spin echo spectrometer were studied in the present investigation and the result was indicated that the gravity spectrometer with ultracold neutrons should give much different dynamical information on the scattering sample due to the neutron optical processes of ultracold neutrons in the scattering processes in the sample.These much instructive indications derived as the results of the present studies would be effectively applied in the coming applied experiments for several actual scattering samples now under preparation.

研究了我们研究所中开发的超低中子的秋季聚焦重力光谱仪的特征性能是能量传递和动量转移的高分辨率，分别是10^<-8> eV和大约10^<-3> a^<o-1>。这些非常高的分辨率无法使用任何其他单一的中子光谱仪来实现，但是最近将开发一种新型的自旋回声光谱计，将使用小角度排列的方法应用，这些方法也应与当前的设备显示出相似的性能。在当前的焦点光谱仪中，跌落的焦点表可以使各种散射角度的测量值同时进行公约范围的景点，从而使人们不可能地进行聚会。散射角度分析的这种特性对于研究散布样品的动力学非常有用。在下一个地方，在本研究中研究了光谱仪的特征性能与新型小角度旋转回波光谱仪相比，在本研究中进行了研究，结果表明，具有超速中子的重力光谱仪应在散射样品中给出了许多不同的散射过程中的散射过程中的散射过程。在即将到来的实验中应用，用于现在准备的几个实际散射样品。