The differential cross sections of 22 MeV proton elastic scattering from 12C,13C nuclei and inelastic scattering for 1/2+(3.09MeV), 3/2-(3.68MeV) and 5/2+(3.85MeV) excitation states of 13C nucleus have been measured between 9° and 130°. The measured elastic scattering data have been compared with the results of microscopic optical potential based upon the effective nn interaction (CEG). Good agreement is obtained. The broad peak located at about 120° for 13C 1/2+(3.09MeV) state has been observed for the first time in the present proton inelastic scattering. The present experimental data for inelastic scattering were analyzed by using full microscopic distortedwave Born approximation (DWBA). From the comparison of present experimental data and theoretical results at forward angles, the authors' analysis indicates the existence of neutron halo in the 13C 1/2+(3.09MeV) excitation state. In addition, by reasonable modification of shell model wavefunction of 13C 1/2+(3.09MeV) excitation state, we can better describe the experimental form factors of (e,e′) and the experimental differential cross sections of (p,p′) at incident energy of 547 MeV. For the 13C 3/2-(3.68MeV) and 5/2+(3.85MeV) states, the full microscopic DWBA analyses can only provide a general description to the experimental data.

The differential cross sections of 22 MeV proton inelastic scattering for the first 1/2+ excitation state (Ex = 3.09 MeV) of 13C have been measured between 9° and 130°. The broad peak located at ~120°, which has been systematically observed in the 0+→0-, 1/2-→1/2+, and 1+→1- transitions for the 16O, 13C, and 14,15N (p,n) charge exchange reactions at Ep = 35 MeV, has been observed for the first time in the present proton inelastic scattering. The present experimental data are analysed by using microscopic distorted-wave Born approximation. From the comparison of present experimental data and theoretical results at forward angles, our analysis indicates the existence of neutron halo in the first 1/2+ excitation state of the 13C nucleus. In addition, by reasonable modification of shell model wavefunction of the first 1/2+ excitation state, we can well describe the experimental form factors of (e,e') and the experimental differential cross sections of (p,p') at incident energy of 547 MeV.

Analyzing powers and differential cross sections have been measured for elastic scattering of 22 MeV polarized protons from 40Ca, 16O and 12C, and differential cross sections for inelastic scattering of 22 MeV protons from 3- (3.736 MeV) and 5 -(4.491 MeV) states of 40Ca have also been measured. The experimental data for polarized proton elastic scattering have been analyzed with a phenomenological optical potential parameters, the experimental data and theoretical values are in good agreement. In the theoretical frame of microscopic single scattering model, transition densities extracted from electron inelastic scattering and M3Y and Haldcrson's effective interactions have been utilized to analyze the experimental data of 22 MeV proton inelastic scattering from 40Ca. Overall, it seems that Halderson's effective interaction can better describe the experimental data than M3Y although the degree of agreement between experimental and theoretical values needs to be improved.

采用分步偏压射频溅射法,通过调整衬底负偏压,在不加热的条件下成功的制备出具有一定结晶取向的sic薄膜,傅立叶红外谱的分析表明,随着衬底偏压的增大,吸收峰位于800cm-1附近Si-C键的数量增大.表明高能氩离子的轰击有利于立方相SiC(β-SiC)的形成.从傅立叶红外光谱SiC特征吸收峰的FWHM表明,采用分步偏压法制备的SiC薄膜,比采用一步偏压法制备的薄膜的质量好.从SEM测试结果表明,SiC薄膜均匀致密,表面比较光滑.同时,在不锈钢衬底上沉积了SiC薄膜,对其防氚性能的测试结果表明氚的渗透率显著下降.

Angular distributions of the elastic and inelastic scattering of 18O + 148Nd at 90.72 MeV were measured by using the Q3D magnetic spectrometer as well as the focal plane detector system. The experimental results were reproduced by DWBA and Coupled Reaction Channel calculation code FRESCO. The polarized potential was introduced in the DWBA calculation and the similar results with the Coupled Channel calculation were obtained. The interference effect of nuclear-Coulomb in the inelastic exciting was discussed and the approximate factor describing the interference intensity were reduced.

The mass of 168Dy has been measured for the first time using the two-proton pick-up reaction 170Er(18O,20Ne) at an 18O energy of 104 MeV. The products of the reaction were detected at the focal plane of the Q3D spectrometer. The Q value of the 170Er(18O,20Ne) 168Dy reaction was found to be 4.71 ± 0.14 MeV . The mass excess of 168Dy was deduced to be −58.57 ± 0.14 MeV.

A Q- value of 4.046 ±0.102 MeV has been determined for the two protons transfer reaction 160Gd(18O, 20Ne) 158Sm at 98.95 MeV. This result yields a first experimental measured value of − 65.738 ± 0.102 MeV for the mass excess of 158Sm, the nucleus far from stability. The result is compared with current theoretical predictions.

The mass excess of the neutron-rich nucleus 122Cd was measured by transfer reactions 122Sn (18O, 20Ne)120Cd and 124Sn (18O, 20Ne) 122Cd. The experiment was carried out at the HI-13 tandem accelerator with Beijing Q3D magnetic spectrometer of CIAE. The energy of the 18O beam was 102 MeV. Targets consisted of highly enriched 122Sn and 124Sn with thickness of 656 microgram/cm2 and 507 microgram/cm2 respectively. The 122Cd mass is derived to be-80.73��0.04 MeV. In addition, a few new levels of 120,122Cd are observed.

The mass of 168Dy was measured using the two-proton pick-up reaction of 170Er (18O, 20Ne) at an 18O with energy of 104 MeV provided by the HI-13 tandem accelerator of CIAE. The reaction products were analyzed by the Beijing Q3D magnetic spectrometer (G120L) and then detected by a gas filled detector at the focal plane of the Q3D spectrometer, which consisted of a ��E-E ionization chamber and two position sensitive counters. The data were recorded by a VAX11/780 computer on-line data acquisition system for off-line analysis. The mass excess of 168Dy is found to be -58.56��0.14MeV. The various contributions to the experimental uncertainty were given.

A Q-value of-4.076��0.151 MeV has been determined for the two-proton transfer reaction 160Gd (18O, 20Ne) 158Sm, which yields a first experimental measured value of -65.764��0.151 MeV for the mass excess of 158Sm, the nucleus far from stability. The result was compared with current theoretical predictions.

The basic features of the system which was combined with Beijing Q3D-G120 magnetic spectrometer in use had been tested on beam by the products from 197Au, 12C, 56Fe, C3H6N6 (p,p) and (��,��) reactions at the tandem accelerator HI-13. Measured intrinsic position resolution is 1.36��0.07mm and the integral nonlinearity for position is 7.5*10-3. The particle identification telescope consisting of ��E-E detectors can identify various kinds of light particles with A equal or smaller than 4 satisfactorily.

A semi-length focal plane detecting system for heavy ions was built and tested by 12+197Au, 16O+150Sm and 18O+156Gd reactions. The intrinsic resolutions of position and angle are 1, 1mm and 0.8�� respectively. The resolutions of energy loss ��E, residual energy ER and total energy ET obtained are 3.0%, 1.4% and 0.9% separately, by adopting a special method of data processing. The achievable mass resolution is estimated to be about 1.0% after necessary corrections for some signals concerned. Discussion about the edge effect of the detector was given too.

A radioactive ion beam facility, GIRAFFE, has been built at the CIAE HI-13 Tandem accelerator. The facility makes use of the inverse kinematics. A D-Q-Q type magnetic separation and focusing system was used in the beam line. This simple device is expected to yield some radioactive ion beams(A<20) near the β-stability line with the acceptable intensities(105–106 pps). The ion beams of 7Be, 11C and 17F were delivered, and the 7Be beam was applied for two experiments.

Angular distributions have been measured for the elastic and inelastic scattering and one-nucleon transfer of 88.0 MeV 16O on 116Sn. Coupled-channels calculations have been performed for the elastic and inelastic scattering, and DWBA treatment for one-proton stripping (16O, 15N), and one-neutron pickup (16O, 17O) reactions. The results compared with the previous 64 MeV ones show energy dependence in the optical potentials and also in the normalization factors with the spectroscopic factors preserving consistent in DWBA analysis, which might relate to the threshold anomaly phenomena.

The excitation functions of 12C elastic scattering for 31P (12C, 12C) reaction at the corresponding angles in the c.m. system equal to 158��, 132��, 128��, 120�� and 98�� in the energy region of 11.2-25.1 MeV had been measured. The experiment was performed at the HI-13 tandem accelerator, China Inst of Atomic Energy, Beijing, by using the Beijing Q3D magnetic spectrometer or semiconductor detector. The excitation functions of 12C elastic scattering from 31P were measured using 31P as a projectile. The energy region of 31P beam was 40-90 MeV, in steps of either 300 KeV or 1 MeV. Some resonance-like structures appear in the excitation function in sub-barrier region of energy in the c.m. system equal to 15.15, 14.18, 13.82, 13.50, 13.17, 12.17 and 11.46 MeV.