中國(guó)先進(jìn)研究堆中子束應(yīng)用關(guān)鍵技術(shù)及若干科學(xué)問(wèn)題立項(xiàng)報(bào)告

陳東風(fēng)

摘 要：該研究的研究?jī)?nèi)容涵蓋物理、化學(xué)、材料和工程等領(lǐng)域，擬解決以下3個(gè)方面的關(guān)鍵科學(xué)問(wèn)題：（1）中子散射關(guān)鍵技術(shù)方法研究；（2）新型功能材料結(jié)構(gòu)和性質(zhì)關(guān)系的中子散射研究；（3）工程部件應(yīng)力分布和中子成像的方法學(xué)研究。為此，項(xiàng)目設(shè)置6個(gè)子研究：（1）反應(yīng)堆中子束優(yōu)化及特殊樣品環(huán)境研究；（2）單晶和多晶新材料的中子衍射研究；（3）強(qiáng)關(guān)聯(lián)體系中原子與自旋動(dòng)態(tài)的中子散射研究；（4）磁性材料的中子散射研究；（5）中子應(yīng)力三維無(wú)損深度測(cè)量技術(shù)研究；（6）中子在物質(zhì)中的衰減與中子成像研究。

關(guān)鍵詞：中國(guó)先進(jìn)研究堆 中子散射技術(shù) 先進(jìn)功能材料 殘余應(yīng)力 中子成像

Project Report of Neutron Beam Application on China Advanced Research Reactor

Chen Dongfeng

（China Institute of Atomic Energy）

Abstract：Nowadays to study the relation between structures and properties of materials is one of the main tasks in Physics， Chemistry， material science and others research fields， and it is a usual way to get the information using particles interaction with matters， among which X ray and neutron are two basic ones. It is well know that the interaction principle of neutrons and photons with atoms is quite different， so more information will be obtained using both complementary tools. The neutron has the following properties： no charge， low energy， inherence magnetic moment， deep penetration， sensitivity on light element （such as H， C， N， O， etc）， distinguishability on isotopes （such as 7Li、11B etc.） and near neighbor elements （such as Mn， Fe and so on）. So neutron scattering technique can not only study the crystal structure， but also obtain the magnetic structure information； not only investigate the static microstructure of materials， but also prove the reliabilities of theoretical models. CARR is expected to be critical in 2009， 60 MW and 8×1014N/（cm2·S-1） unperturbed thermal neutron flux make it standing on an international advanced level. Using the four circle， powder， residual stress neutron diffractometers and neutron imaging instrument at CARR， in this project studies focus on three aspects： （1）the methodology study of neutron scattering technique； （2）the neutron scattering study on the relation between the structures and properties of novel function materials； （3）studies of the residual stress distribution in engineering components and the methodology of neutron imaging. Six topics are set as following： （1）Optimization on reactor neutron beam and studies on special sample environment； （2）Atomic and spin dynamics in strongly correlated system studied by neutron scattering； （3）Neutron Diffraction Study on Novel Crystal Materials； （4）Neutron scattering study on magnetic materials； （5）Neutron Diffraction Study on Three-Dimensional Nondestructive Deep Measurement of The Residual Stress； （6）Study on neutron attenuation in matter and neutron imaging.

Key Words：China advanced research reactor； Neutron scattering； Novel function materials； Residue stress； Neutron imaging

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