RBE of cells irradiated by carbon ions

于1905-07-02批量导入IMP-IR

A new dual injection system for AMS facility

IEECAS SKLLQG

Application Of (CS)-C-137 fingerprinting technique to interpreting sediment production records from reservoir deposits in a small catchment of the Hilly Loess Plateau；China

IEECAS SKLLQG

~(136)Ba的10~+同质异能态

利用 450MeV的82 Se束流轰击139La靶 ,通过核子转移反应产生了136 Ba ,用在束γ谱学方法测量了其激发态的γ衰变 ,观测到了它的 1 0 +态同质异能态并得到该同质异能态的寿命为 94ns.

碳离子辐照细胞的相对生物学效率

研究了传能线密度 (LET)≥ 1 2 5.5keV μm的碳离子辐照小鼠黑色素瘤B1 6、人的宫颈癌HeLa、中国仓鼠肺V79、人的肝癌SMMC 772 1 4种细胞的相对生物学效率 (RBE) .得到了当LET =1 2 5.5keV μm时 ,RBE依赖于细胞种类并随细胞存活水平的升高而增加的关系 ,以及当LET≥ 1 2 5.5keV μm时 ,RBE随着LET的增大而变小的关系

Characterization of metal-containing molecular sieves and their catalytic properties in the selective oxidation of cyclohexane

Three types of metal-containing molecular sieves with AFI, AEL and CHA structures (Me = Co, Mn, Cr and V) were synthesized hydrothermally and characterized by XRD, XRF, TG, TPR, NH3-TPD and FT-IR. It was revealed that metals were incorporated into the framework of molecular sieves and induced the presence of charge centers. Both cobalt and manganese in the framework of AIPO-5, AlPO-11 and SAPO-34 were not reducible before the structure collapse. The redox behaviours of these catalysts in cyclohexane oxidation at 403 K using O-2 as oxidant were examined. CoAPO-11 exhibited best activity and good selectivities for the monofunctional oxidation products (88.5%). Cyclohexanol was the major product over most catalysts, whereas for Cr-containing molecular sieves, high selectivity of cyclohexanone was observed. Investigation of reaction mechanism based on CoAPO-11 and CrAPO-5 catalysts indicated that the decomposition of cyclohexyl hydroperoxide (CHHP), the intermediate in cyclohexane oxidation, followed the pathway: cyclohexanone <-- CHHP --> cyclohexanol -->cyclohexanone. (C) 2004 Elsevier B.V. All rights reserved.