单电离态Kr原子强跃迁能级振子强度的研究

阐述了用束-箔方法通过测量单电离态Kr原子强跃迁谱线的能级寿命来 确定振子强度f-值的方法,并对确定出的强跃迁谱线的能级吸收振子强度进行简要讨 论。     

硫的高电离态离子激发光谱的测量

在兰州重离子加速器研究装置(HIRFL)上 ,利用束-箔光谱方法测量了波长在19～40nm范围的硫元素高电离态离子光谱 ,实验上观测到了30多条离子谱线 .这些谱线是SⅩ-SⅩⅤ高电离态离子激发能级发射的 ,其中5条为新观测到的谱线 ,尚未见到报道 .本实验结果与其他实验和理论进行了比较 .     

高电离态Ti原子光谱的测量

在加速器上利用束箔光谱方法，测量了Ti离子的高电离态光谱。     

Study of n=2,Δn=0 transition of Be-, B-, C-, N- and O-like sequence in the beam--foil spectrum of titanium

The foil-excited the spectrum of highly stripped titanium ions between 12-40 nm has been studied. Titanium ions of 80 and 120 MeV were provided by the HI-13 tandem accelerator at the China Institute of Atomic Energy. GIM-957 XUV-VUV monochromator was refocused to get highly-resolved spectra. Our experimental results and the published spectral data of laser-produced plasma show agreement in nearly all cases within ±0.03 nm. The spectra contained some weak or strong lines previously unclassified. These spectral lines mainly belong to 2s2p^2 for TiXVⅢ, 2p^3 for TiXVIII, 2s2p^3 for TiXVII, 2p^6 4p for Ti XII and 2p^6 3d for Ti XII transitions.     

高电离态原子光谱和能级寿命自动测量控制系统

描述了用于高电离态原子光谱和能级寿命测量的计算机自动测量控制系统.介绍了系统的工作原理、总体设计, 给出了实验结果.     

高电荷态离子Ar17+与Mo表面作用过程中的X射线发射

观测了低速(小于Bohr速度)高电荷Ar¹⁷⁺离子与金属Mo表面相互作用的X射线发射,以及ArKα,KβX射线强度随入射离子动能的变化.     

Trigger design for a gamma ray detector of HIRFL-ETF

The Gamma Ray Array Detector (GRAD) is one subsystem of HIRFL-ETF (the External Target Facility (ETF) of the Heavy Ion Research Facility in Lanzhou (HIRFL)). It is capable of measuring the energy of gamma-rays with 1024 CsI scintillators in in-beam nuclear experiments. The GRAD trigger should select the valid events and reject the data from the scintillators which are not hit by the gamma-ray. The GRAD trigger has been developed based on the Field Programmable Gate Array (FPGAs) and PXI interface. It makes prompt trigger decisions to select valid events by processing the hit signals from the 1024 CsI scintillators. According to the physical requirements, the GRAD trigger module supplies 12-bit trigger information for the global trigger system of ETF and supplies a trigger signal for data acquisition (DAQ) system of GRAD. In addition, the GRAD trigger generates trigger data that are packed and transmitted to the host computer via PXI bus to be saved for off-line analysis. The trigger processing is implemented in the front-end electronics of GRAD and one FPGA of the GRAD trigger module. The logic of PXI transmission and reconfiguration is implemented in another FPGA of the GRAD trigger module. During the gamma-ray experiments, the GRAD trigger performs reliably and efficiently. The function of GRAD trigger is capable of satisfying the physical requirements.     

离化态氧原子的激发光谱的研究

在串列加速器上利用束箔-方法和带有CCD的光谱仪测量装置,在2～2.5 MeV束能下采用Spectrapro-500i光谱单色仪,在200 nm～800 nm波长范围测量了离化态氧原子的500多条光谱线.实验发现了许多弱谱线的跃迁能级,这些跃迁谱线以前带有光电倍增管或电子倍增器的单色仪很少测量到这些弱谱线的跃迁.本文报道在200nm～300nm范围已确定的部分光谱线和跃迁能级,这些跃迁主要属于OⅡ到OⅣ离化态原子的3p 4S3/2,3p 2 S1/2,3p 4P1/2,3p 4P3/2,3p 4P 5/2,3p 2D3/2,3p 2D5/2,3d 2D5/2,3d 2F5/2,3d2F7/2,4p 3D1,4p 3D2,5d 2D5/2等能级的跃迁,光谱分辨0.015 nm.     

基于ASIC芯片的硅微条阵列探测器多通道前端电子学模块设计

描述了为兰州重离子加速器冷却储存环(HIRFL-CSR)外靶实验系统硅微条阵列探测器而设计的前端电子学模块。该模块采用专用ASIC芯片,可以处理96路能量信号。对前端电子学模块的性能进行了测试,结果表明,该模块在0.1～0.7 V范围内的积分非线性好于0.3%;其电子学分辨好于0.45%,最大串扰小于10%;通道一致性测试结果好于1.3%;在室温下连续工作24 h后,零点峰位最大漂移为1.48 m V。     

单电离态Kr原子的能级寿命的研究

在 12 0keV的能量下 ,用束 -箔方法研究了跃迁强谱线的单电离态Kr原子激发态能级5p4 D07/2 ,5p4 D05/2 的寿命。并与理论和其它实验结果做了比较和讨论。