最新刊期
      卷 0 ， 期 0 ， 2020
      • Jun Feng,Wenqing Shen,Quanmin Yin,Genming Jin,Bing Wang,Jianqun Zhou
        Vol. 13, Issue 7, (1990)
        摘要：Secondary beam is a new and efficient experimental technology which is developed to study nuclear physics in recent years. This technology and its application are reviewed. The idea for developing the secondary beam technology on HIRFL accelerator is described, and the result of first-order beam optics is also given.  
        关键词：Secondary beam technology;Neutron-rich isotope;Reaction cross section;Nuclear radius;Neutron excess degree;Beam optics   
        9
        |
        13
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342570 false
        发布时间：2022-08-16
      • Huansheng Cheng,Fujia Yang,Guoqing Zhao,Chengteng Zhang,Shiming Wu,Xiaowei Yao
        Vol. 13, Issue 7, (1990)
        摘要：A technique for measuring stoichiometry of Y-Ba-Cu-O thin films with an accuracy of a few percent is described. This technique utilizes non-Rutherford backscattering of 8.8 MeV helium ions, which has an increased sensitivity for 16O by a factor of 25 over Rutherford backscattering. The method is not only well suitable to Y-Ba-Cu-O thin film but also to Bi-Sr-Ca-Cu-O and T1-Ba-Ca-Cu-O thin films.  
        关键词：Superconducting thin film;Elastic scattering of high energy ion;Stoichiometry of elements   
        9
        |
        13
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342553 false
        发布时间：2022-08-16
      • Zhongquan Ma,Jiarui Liu
        Vol. 13, Issue 7, (1990)
        摘要：The energy stragglings of light ions such as 1H and 4He in partial gases and solids are calculated by IPM potential directly, and the Гth value varies with the atomic number of target atom Z2 and the incident ion energy E. The present results calculated are in good agreement with the recent experiments by Y. Kido within 2.5—4.0%.  
        关键词：IPM potential;Light ion;Energy straggling   
        9
        |
        13
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342522 false
        发布时间：2022-08-16
      • Zhigao Huang
        Vol. 13, Issue 7, (1990)
        摘要：The spatial distributions of magnetic texture in crystalline Fe50Ni50 and amorphous Fe56Ni25Si3.5B13.5C2 and Fe78Cr4Si5B13 alloys were analysed by the Mössbauer technique. The results indicated that the magnetization distribution of the rapidly quenched amorphous alloys was preferentially in the ribbon's plane, and Ni and Cr doped in the amorphous Fe81Si3.5B13.5C2 alloy had different influence on domain structure of the sample. The results of Mössbauer studies with external magnetic field revealed that the magnetization process of amorphous magnetic alloys was predominately the one of magnetic domain, and for amorphous Fe56Ni25Si3.5B13.5C2 and Fe78Cr4Si5B13 alloys existed magnetic states more than one.  
        关键词：Mössbauer spectrum;magnetic texture;Magnetic domain;amorphous   
        9
        |
        13
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342521 false
        发布时间：2022-08-16
      • Zhihao Zheng,Yongqiang Wang
        Vol. 13, Issue 7, (1990)
        摘要：When the depth distribution is measured by using nuclear resonant reaction, it is necessary to carry out complex deconvolutions in order to get concentration distribution from experimental data. In this paper, a "Gaussian resolution function" is put forward to simplify the calculations. The distributions of three elements implanted in silicon are dealt with, and the result is satisfactory.  
        关键词：Resonant reaction;Gaussian resolution function;Yield distribution;Concentration distribution   
        9
        |
        12
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342523 false
        发布时间：2022-08-16
      • Rongdian Han,Huilin Jiang,Chuanming Zou,Jianxian Song,Zhufang Gong,Zhaomin Wang,Zuhe Bian
        Vol. 13, Issue 7, (1990)
        摘要：The changes of positron annihilation parameters of BaF2 crystals irradiated with different doses have been studied. The lifetime of positron annihilation and the one-dimensional γ angular correlation curve varied after irradiation, which indicated that the structure of BaF2 crystals had changed to some extent. The properties of the damaged BaF2 crystals can recover and the recovery becomes faster when BaF2 is exposed to visible light, especially ultraviolet.  
        关键词：Positron annihilation;Lifetime;Positronium;One-dimensional angular correlation   
        9
        |
        12
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342626 false
        发布时间：2022-08-16
      • Zhongheng Song,Xiaomin Wang
        Vol. 13, Issue 7, (1990)
        摘要：The main data for engineering calculation of designing S.W. electron linacs of four wave bands (from L-band to X-band) are given in this paper. It can be used as a basis of engineering design.  
        关键词：Side coupled cavity;Steady state;Storage energy state   
        10
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342583 false
        发布时间：2022-08-16
      • Guanjun Yuan,Ping Wu,Chunxiang Yang,Zhongtao Pan,Jinli Tang
        Vol. 13, Issue 7, (1990)
        摘要：The physical design and characteristics of the BGO-HpGe anti-Compton suppression spectrometers for high spin-state study with home-made BGO scintillators are briefly described. The suppression coefficients are 2.8, 4.2 and 5.3 in the energy region of 100—500, 500—700 and 700—900 keV respectively for 60Co γ-rays. The peak-to-total ratio is about 46—49%.  
        关键词：BGO scintillator;BGO-HpGe anti-Compton suppression spectrometer;Suppression coefficient;Peak-to-total ratio;High spin state   
        8
        |
        13
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342616 false
        发布时间：2022-08-16
      • Yurong Zhang,Xiaofeng Wu,Jiongming Zhu
        Vol. 13, Issue 7, (1990)
        摘要：The BGO crystal devices are made up of BGO crystals packed in a common aluminium housing. Energy resolution and light output of these devices were improved as compared with the bare BGO crystals. Some characteristics of the devices were mearsured and compared with Nal(T1) crystals with the same size.  
        关键词：Nal(T1) crystal;BGO crystal devices;Energy resolution;Light output;Full energy peak efficiency   
        10
        |
        12
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342625 false
        发布时间：2022-08-16
      • Yan Jiang,Junjie Ma,Shunfu Li,Hongzhu Wu,Hong Chen,Ning Kuang,Di Li
        Vol. 13, Issue 7, (1990)
        摘要：Samples of superphosphate and phosphoric ores from phosphate fertilizer factories in Liaoning Province were analyzed for uranium, radium-226 and thorium contents. The analytical results showed that superphosphate contained uranium up to 8.30 ppm, radium-226 up to 111.37 Bq/kg and thorium up to 2.81 ppm, and phosphoric ores contained uranium up to 35.66 ppm, radium-226 up to 468.95 Bq/kg and thorium up to 3.35 ppm, respectively.  
        关键词：Phosphate fertilizer;Superphosphate;Phosphoric ore;Uranium;Radium-226;Thorium   
        9
        |
        13
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342639 false
        发布时间：2022-08-16
      • Hesheng Qian,Huinong Zhu,Qiuming Huang,Yongsheng Wang,Jiangang Shi
        Vol. 13, Issue 7, (1990)
        摘要：Spectrophotometric determination of thorium with a new reagent 3- (4-chloro-2-phos-phonophenylazo-6- (2,6-dibromo-4-nitrophenylazo) -4,5-dihydroxy-2,7-naphthalene disalfonic acid (DBNCPA) is described. In nitric acid medium (0.08—0.5 mol) , DBNCPA reacts with thorium ion to form a purple complex, which composition is Th:DBNCPA= 1:4. The maximum absorption peaks of DBNCPA and its thorium complex are at 543 and 638nm respectively. The molar absorption is 6.64×104 1/mol·cm. It obeys Beer's law for thorium ranged 0—15 µg/25ml, and most of metallic ions do not interfere the determination.  
        关键词：Dibromo-nitro-chlorophosphonazo;Spectrophotometric method;Thorium   
        8
        |
        12
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342640 false
        发布时间：2022-08-16
      • Yi Wei,Xuebin Wang,Boli Liu,Xiujuan Xu
        Vol. 13, Issue 7, (1990)
        摘要：The kinetics of ligand exchange reaction between 99mTc-GH and CMPI is investigated in order to optimize the preparation condition for 99mTc-CMPI which is a recently developed myocadial imaging agent. The reaction was evidently influenced by CMPI and Sn2+ concentrations and pH.  
        关键词：99mTc-glucoheptonate;Carbomethoxy isopropyl isonitrile;Ligand exchange kinetics   
        10
        |
        13
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28342641 false
        发布时间：2022-08-16
      0