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Biological effects of radioactive ~9C-ion beams on cells

Chinese Science Bulletin 2005年第11期50卷 1070-1075页

作者： weizengquan LIQiang A.Kitagawa T.Kanai M.Kanazawa Y.Furusawa E.Urakabe XIEHongmei ZHOUGuangming InstituteofModernPhysics ChineseAcademyofSciencesLanzhou730000China InstituteofModernPhysics ChineseAcademyofSciencesLanzhou730000China//NationalInstituteofRadiologicalSciencesChiba263-8555JapanCorrespondenceshouldbeaddressedtoWeiZengquan NationalInstituteofRadiologicalSciences Chiba263-8555JapanCorrespondenceshouldbeaddressedtoWeiZengquan

The distinguishing feature and current technique progress of tumor treatment with heavy-ion beams is introduced in the paper. Additional superiority to tumor treatment from a radioactive ion beam (RIB) is emphatically discussed. The experimental research of the radioactive 9C-ion beams aimed at tumor treatment at Heavy Ion Medical Accelerator in Chiba (HIMAC), National Institute of Radiological Sciences (NIRS), Japan is described in detail, La-eluding production of the beams, optimization of parameters, distribution of depth dose, survival effect of cell and comparison of RBE between 9C- and 12C-beams. Results show that under 40 mm thick Beryllium target and 10 mm thick aluminum degrader at full (5%) momentum acceptance, the production rate and purity of the produced 9C-beams are 9.07×10-6 and 82.88% respectively with the primary 12C-beams of 430 MeV/u and 1.8×109 pps. A uniform irradiation field with homogeneity up to 89.6% inside central area 10 mm in diameter is obtained by using spot scanning. In this case, the dose rate at the entrance is 0.5 Gy/h. In survival experiment of cells, the average relative biological effectiveness (RBE) of 9C-beams is 5.28 and 2.93 for 12C-beams in the region around Bragg peak. The RBE of 9C-beams is 1.8 times higher than that of 12C-beams. It indicates that cell-killing efficiency of 9C-beams is stronger than that of 12C-beams. 9C-beams are more efficacious for tumor treatment than 12C-beams.

关键词：生物学放射性粒子束参数优化生存能力肿瘤细胞治疗方法

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Growth Delay of Mouse Lewis Tumors by Carbon Ion Radiation

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2002年第1期 66-67页

作者： LiWenjian GuoHongyun LiDexing DangBingrong MaQiufeng YuanShibin WangXiao HaoJifang ZhouLibin MaoShuhong weizengquan 不详 GansuAcademyofMedicalSciences.

Growth delay of transplantable Lewis tumors growing in right hind legs in C57 BI/6J mice were investigated after 12C6+ ion radiation at HIRFL. Half and half of C57 BL/6J female and male mice, weight of 18-20 g, were p... 详细信息

关键词：碳离子辐射小鼠刘易斯肿瘤生长延迟时间-体积曲线肿瘤学实验

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Calibration Experiments for Identification of Space Heavy Ions by CR-39

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2003年第1期 77-78页

作者： weizengquan N.Yasudab XieHengmei K.Fujitakab M.T.Meic 不详 NationalInstituteofRadiologicalSciences Japan.

A subject "Study of mechanism and application of space radiation induced mutation breeding on rice" has been established in NSFC, China. In order to verify space heavy particles being main cause (in addition, microgravity, vacuum, magnetic field etc.) of induced biological effects in space and in order to study correlation of various mutation and its serious degree with different particle parameters, measurement and identification of the particles are necessary. CR-39 sheets are a part of a sandwich detecting system. The system consists of rice seeds and CR-39 solid state nuclear track detectors. The seeds hit by space particles could be determined withetched tracks in CR-39. Furthermore, the space heavy particles could be identified with measured parameters of the tracks such as residual range and etch rate.

关键词：实验刻度空间重离子放射性稻生物效应基因变异原子核轨迹探测器

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Location Determination of Ion Track Hitting Rice Seed Loaded in Shenzhou 3

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2002年第1期 65-65页

作者： weizengquan XieHongmei MeiMantong HaoJifang MaQiufeng MaoShuhong 不详 BioteclmologyCollege SouthChinaofAgriculturalUniversity.

In order to get a clear understanding of the mechanism of space radiation breeding, a detecting system was manufactured. The system consisted of 3 boards of rice seeds (1# and 2# for Qinghua non-glutinous rice and 3# for Pearl early rice, Huiyang) and 10 layers of solid state nuclear track detectors (CR-39) in sandwich (Fig.1). It was loaded in space shuttle Shenzhou 3 (at astronaut seat) in the last 10-day period of March, 2002.

关键词： “神舟”三号水稻种子离子径迹定位测量宇宙射线辐射中国农业大学太空离子

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Improvement of Herbage by Heavy Ion Beams

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2002年第1期 71-71页

作者： XieHongmei HaoJifang weizengquan XieZhongkui LiFengqin WangYajun InstituteofColdandAridEnvironmentandEngineering theChineseAcademyofSciencesLanzhou. 不详

Herbage seeds of legume and grass (Defu, American fine stem spread alkaline grass and so on) were penetrated with 80 MeV/u 20Ne10+ ions supplied by HIRFL, NLHIAL. Average LET in plateau of Bragg curve of the ions was 120 keV/μm. Irradiation dose was 40, 60, 80, 100, 150 Gy for leguminous herbage and 15, 20, 30, 40, 50 Gy for grass herbage. Dose rate of irradiation was 3 Gy/min. Irradiation was carried out in atmosphere. Some of irradiated seeds were sown in the fields and others were used to do experiments for cytology.

关键词：重离子束牧草改良豆科牧草禾科牧草染色体改变

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An Improved New Cultivar of Spring Wheat Bred by Heavy Ion Beams with Medium Energy-"Longfu 2"

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2003年第1期 86-86页

作者： XieHongmei weizengquan WangHaohan LiuQin ZhaoLianzhi LiWenjian LiQiang WangJufang ZhouGuangming DangBingron 不详 ZhangyeInstituteofAgriculturalSciences ZhangyeGansu.

75 MeV/u oxygen ion (^16O+8) beams supplied by HIRFL were used to irradiate 14615 of spring wheat dry seeds of stable multi-generation. Range of the ions in the seeds is about 11 mm. They can enter the seed from its embryo, come out from its top, and penetrate through an entire grain of wheat, length of which is about 6～7 mm. The seeds were vertically inserted in a sample plate of 4 cm in diameter, which can contain about 100 grain of the seeds. During irradiation, the embryo of the seeds faced to ion beams and was irradiated at normal temperature and atmosphere. Irradiation dose was arranged in 1×10^7, 5×10^7, 1×10^8, 2×10^8 and 5×10^8 ions/cm^2 with dose rate of about 3 Gy/min. A part of the irradiated seeds was employed for cytology examination in laboratory, the others were used for breeding in the fields.

关键词：氧离子能量束 HIRFL 小麦种子辐射伤害细胞学

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