Allen Andrew J, Zhang Fan, Kline R Joseph, Guthrie William F, Ilavsky Jan
Materials Measurement Science Division, National Institute of Standards and Technology , 100 Bureau Drive, Gaithersburg, MD 20899, USA.
Materials Science and Engineering Division, National Institute of Standards and Technology , 100 Bureau Drive, Gaithersburg, MD 20899, USA.
J Appl Crystallogr. 2017 Mar 7;50(Pt 2):462-474. doi: 10.1107/S1600576717001972. eCollection 2017 Apr 1.
The certification of a new standard reference material for small-angle scattering [NIST Standard Reference Material (SRM) 3600: Absolute Intensity Calibration Standard for Small-Angle X-ray Scattering (SAXS)], based on glassy carbon, is presented. Creation of this SRM relies on the intrinsic primary calibration capabilities of the ultra-small-angle X-ray scattering technique. This article describes how the intensity calibration has been achieved and validated in the certified range, = 0.008-0.25 Å, together with the purpose, use and availability of the SRM. The intensity calibration afforded by this robust and stable SRM should be applicable universally to all SAXS instruments that employ a transmission measurement geometry, working with a wide range of X-ray energies or wavelengths. The validation of the SRM SAXS intensity calibration using small-angle neutron scattering (SANS) is discussed, together with the prospects for including SANS in a future renewal certification.
本文介绍了一种基于玻璃碳的小角散射新标准参考物质[NIST标准参考物质（SRM）3600：小角X射线散射（SAXS）绝对强度校准标准]的认证情况。该SRM的创建依赖于超小角X射线散射技术的固有一级校准能力。本文描述了如何在0.008 - 0.25 Å的认证范围内实现并验证强度校准，以及该SRM的目的、用途和可用性。这种稳健且稳定的SRM所提供的强度校准应普遍适用于所有采用透射测量几何结构、使用广泛X射线能量或波长的SAXS仪器。文中讨论了使用小角中子散射（SANS）对SRM SAXS强度校准的验证，以及在未来更新认证中纳入SANS的前景。
