Inelasticity Effect on Neutron Scattering Intensities of the Null-H2O
Inelasticity Effect on Neutron Scattering Intensities of the Null-H2O
复制标题
非弹性对零水中子散射强度的影响
DOI：
10.1080/10238160310001657817
复制
发表时间：
2003
影响因子：
1.1
通讯作者：
T. Fukunaga
中科院分区：
文献类型：
--
作者：
Y. Kameda;M. Sasaki;T. Usuki;T. Otomo;K. Itoh;K. Suzuya;T. Fukunaga
对氢原子平均相干散射长度为零的液体零水进行了飞行时间(TOF)中子散射测量。为了确定非弹性效应与散射角和中子飞行路径比的关系，γ[=L_{S}/(L_{0}+L_{S})，L 0和L S分别表示慢化剂-样品和样品-探测器的距离]，用安装在日本筑波的KENS的HIT-II、RAT和SWAN三台中子谱仪进行了中子散射测量。从观测到的散射截面减去已知的O-O偏结构因子，得到了零H2O的自散射强度。结果表明，即使在比文献中提出的一阶非弹性修正公式所期望的散射角更小的情况下，自散射项所涉及的非弹性变形的大小仍然是显著的。自散射中的非弹性变形。
Time-of-flight (TOF) neutron scattering measurements have been carried out for liquid null-H2O, in which the average coherent scattering length of hydrogen atoms is zero. In order to determine the inelasticity effect depending on both the scattering angle and the neutron flight path ratio, γ [ = l_{s}/(l_{0} + l_{s}), l 0 and l s denote the moderator-sample and sample-detector distances, respectively], neutron scattering measurements have been performed using three neutron spectrometers, HIT-II, RAT, and SWAN, installed at KENS, Tsukuba, Japan. The self-scattering intensity for the null-H2O was derived by subtracting the known O–O partial structure factor from the observed scattering cross-section. It has been revealed that the magnitude of the inelasticity distortion involved in the self-scattering term is still significant even at a smaller scattering angle than that expected from the first-order inelasticity correction formulas proposed in the literature. The inelasticity distortion in the self-scatter...