氮离子注入GCr15钢的改性研究

本文用1、3、5和7 * 10~(17) ions/cm~2剂量的100keV ~(14)N~+注入GCr15钢样品以提高其表石耐磨性，通过磨粒磨损实验作出各种剂量下钢样表石的磨损曲线，定出有显著耐磨性的起始注入剂量。利用CEMS方法（自己建立）和X射线衍射对不同剂量的注入层内的相组织进行相对定量（含铁相）和定性分析，并进行表石硬度测试，对耐磨性提高的机理进行探

强流加速器材料研究

加速器技术的快速发展以及科学技术研究和应用的不断需求,使得高流强和高品质成为新一代加速器装置的最重要的指标。目前大型科学实验装置如重离子束驱动的惯性约束聚变装置、对撞机、中微子及介子工厂、散裂中子源等都需要强流加速器。详细介绍了强流加速器中涉及的材料问题以及强流加速器在聚变堆材料研究中的作用和前景

快重离子在固体中引起的电子发射

简要介绍了快重离子与固体相互作用研究的状况和快重离子引起固体电子发射的机制 ,讨论了电子能损导致原子位移的 3种微观模型 ,即“库仑爆炸”模型、“热峰”模型和“激发排斥”模型 ,简述了研究电子发射的实验测量装置和测量方法 ,讨论了总电子发射产额与电子能损的关系以及靶俄歇电子和快传输电子测量在电子激发诱发辐照损伤微观机制研究中的应用 ,并介绍了重离子在 C靶中产生的离子径迹处的电子温度和聚丙稀靶中离子径迹势的提取方

面向技术需求的潜在技术转移专利识别

［目的/意义］为了在大规模的专利文献中，面向技术需求实现专利文献和技术需求的匹配，识别潜在的技术转移专利，以提高技术转移信息服务水平。［方法/过程］文章基于语义TRIZ标注专利文献和技术需求的技术问题、技术功能、技术效果三种技术特征词组，通过同义词典计算特征间的相似性，构建语义的文本-词项向量空间模型，计算专利文献和技术需求的相似性，根据相似度排序识别潜在的技术转移专利。并以新能源汽车电池领域为研究对象进行实证研究。［结果/结论］实证结果表明，针对技术需求，在一定程度上能识别与其匹配的专利文献，识别潜在的技术转移专利。［局限］本研究的局限性在于抽取的技术特征词组数量有限，未来将结合关键词和技术特征词组更加全面地表示专利文献和技术需求。</p

Determination of the electron temperature in the thermal spike of amorphous carbon

<span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; line-height: 22px; widows: 1; background-color: rgb(248, 248, 248);">The target KVV Auger-electron emission has been investigated experimentally and theoretically for heavy-ion irradiation of amorphous carbon at an ion velocity of 14.1 atomic units (5 MeV/u). We present experimental evidence for an influence of the target excitation density on the shape of carbon Auger-electron spectra far O7+, Kr17+ and Kr30+ ions. An analysis of the Auger structures allows for the first time to extract electron temperatures at the center of nuclear tracks and comparison is made with results of two thermal-spike models.</span

An outlook of heavy ion driven plasma research at IMP-Lanzhou

Since the successful completion of the cooling storage ring (CSR) project in China at the end of 2007, high qualitative heavy ion beams with energy ranging from keV to GeV/u have been available at the Heavy Ion Research Facility at Lanzhou (HIRFL). More than 1091 GeV/u C6+particles or 108235 MeV/u Xe particles can be stored in the CSR main-ring and extracted within hundred nano-seconds during the test running,the beam parameters will be improved in the coming years so that high energy density (HED) conditions could be achieved and investigated there. Recent scientific results from the experiments relevant to plasma research on HIRFL are summarized. Dense plasma research with intense heavy ion beams of CSR is proposed here.Since the successful completion of the cooling storage ring (CSR) project in China at the end of 2007, high qualitative heavy ion beams with energy ranging from keV to GeV/u have been available at the Heavy Ion Research Facility at Lanzhou (HIRFL). More than 1091 GeV/u C6+particles or 108235 MeV/u Xe particles can be stored in the CSR main-ring and extracted within hundred nano-seconds during the test running,the beam parameters will be improved in the coming years so that high energy density (HED) conditions could be achieved and investigated there. Recent scientific results from the experiments relevant to plasma research on HIRFL are summarized. Dense plasma research with intense heavy ion beams of CSR is proposed here

重离子束对肿瘤靶区的三维适形照射装置

本实用新型涉及一种重离子束对肿瘤靶区实施三维适形照射治疗的装置，它含有扫描磁铁系统、束流监测系统、迷你型脊形过滤器、射程移位器、多叶准直器和患者体表补偿器，分别依序置于患者体表前，上述器件的中心与肿瘤靶区的中心处于束流轴线上。本实用新型克服了目前基于被动型束流配送系统重离子束二维适形照射治疗方法中适形程度不高、散射体降低束流品质等缺点，在不需要使用现有二维适形照射方法中的散射体条件下，通过三维适形照射提高了重离子束对肿瘤靶区治疗的适形程度，在不降低利用重离子束高剂量Ｂｒａｇｇ峰区高效杀灭靶区肿瘤细胞的前提下，可最大限度地保护肿瘤靶区周围的健康组织，减小正常组织并发症几率，从而提高重离子束的治疗疗效

从晕中子核引起核反应中提取对称势

利用同位旋相关量子分子动力学理论研究了中子晕核引起核反应机制中重要的同位旋效应以提取对称势．因为同位旋相关量子分子动力学理论中的相互作用和介质中核子-核子碰撞截面都灵敏地依赖于碰撞系统的密度分布,本项研究工作基于中子晕核扩展的密度分布．该密度分布包含了反应机制中同位旋效应和疏散内部结构的平均特征．为了弄清楚晕核引起核反应机制的同位旋效应,在完全相同的入射道条件下,比较了由中子晕核炮弹引起的同位旋效应和由相等质量的稳定核炮弹引起同位旋效应．结果发现中子晕核炮弹引起的发射中子-质子比和同位旋分馏比明显大于相等质量稳定弹核产生的结果．因而可以通过理论结果与实验数据的系统比较提取对称势

兰州重离子研究装置2016年年度报告

兰州重离子研究装置年度报告以年度报告的形式，综合分析兰州重离子研究装置的年度运行情况与基本情况，研究进展与成果、设施建设、运行与改造、科技队伍与人才培养、合作与交流等情况

DOUBLE-IONIZATION OF HELIUM BY 40 MEV PROTONS

<span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; line-height: 22px; widows: 1; background-color: rgb(248, 248, 248);">Differential ionization cross-sections for 40 MeV H+ + He collisions were measured as a function of electron energy, electron ejection angle and final recoil ion charge state. Coincidences between recoil ions and emitted electrons were taken for electron ejection angles of 55-degrees and 125-degrees and energies between 3 and 500 eV. Good agreement is found between measured energy distributions of ejected electrons and results of standard first-order perturbation theory in the case of single ionization. The experimental double-ionization cross-sections, however, are found to exceed independent-electron model predictions by more than an order of magnitude. Furthermore, evidence is provided that this deviation is mainly due to initial-state correlation.</span