For studying the halo structure of 9C,a set of ΔE-E telescope detector was applied in the experiment of 9C fragmentation reaction carried out at the facility of Radio-active Ion Beam Line in Lanzhou(RIBLL).The detector was used to measure the fragments produced in the reaction.The principal aim is to solve the crosstalk between silicon strips and the energy calibration of silicon strip and CsI(Tl) crystal.Using the induced signal of the saturated signal produced by heavy ion punching through the silicon strip,the deposited energy was calibrated.Combining the simulated result and experimental data,a series of energy points were obtained to calibrate the CsI(Tl) crystal.The ion track was reconstructed by position information both in silicon strip and in CsI(Tl) crystal which were coincident with each other for one ion.Finally,the real physics event was obtained.

A parallel plate avalanche counter(PPAC) with delay-line readout was designed to be used in the experiment of investigation of resonant properties in 18Ne via 17F+p.The position resolution,time resolution,and detection efficiencies of PPAC were researched in detail.The results of analysis show that 1 mm position resolution,0.29 ns time resolution,and 97% detection efficiencies are achieved.

A microscopic cluster model with a fully correlated Gaussian basis is developed. In the model, the stochastic variational method is used in order to calculate the ground-energy and the mean-square radius conveniently. Based on this model, the ground-energy level and radius of the neutron halo nucleus, 6He, are calculated as a α+n+n three-cluster model. The results are in good agreement with the experimental data.

Excited states in the stable nucleus $^{193}\mathrm{Ir}$ have been investigated through an in-beam $\ensuremath{\gamma}$-ray spectroscopic technique following the $^{192}\mathrm{Os}$($^{7}\mathrm{Li}$, $\ensuremath{\alpha}2n$) reaction at a beam energy of 44 MeV. A level scheme built on the $\ensuremath{\pi}{h}_{11/2}$ isomer has been extended to high-spin states using eleven newly observed $\ensuremath{\gamma}$ transitions. The $\ensuremath{\pi}{h}_{11/2}$ band is proposed to be formed by coupling an ${h}_{11/2}$ proton to a core with large triaxial deformation. Three-quasiparticle states are suggested in $^{193}\mathrm{Ir}$ on referring to the similar states in $^{187}\mathrm{Ir}$. The features of signature splitting in the $\ensuremath{\pi}{h}_{11/2}$ bands of ${}^{187\ensuremath{-}193}$Ir are discussed with the help of total Routhian surface calculations.

The principle and structure of a 8×8 CsI(Tl) array detector were described in this paper.For each unit,there are a CsI(Tl) crystal,an optical conductor and a photoelectric multiplier tube.The length of CsI(Tl) crystal is about 50 mm with a 21 mm×21 mm front surface and a 23.1 mm×23.1 mm back surface.The energy resolution is 2.7% for 30 MeV proton and 1.5% for 170 MeV 7Be,which was tested on the RIBLL(Radioactive Ion Beam Line in Lanzhou).It can be used to identify the charged particles in the nuclear experiments induced by the radioactive beam.

A high performance Time-of-Flight detector has been designed and constructed for isochronous mass spectrometry at the experimental Cooler Storage Ring (CSRe). The detector has been successfully used in an experiment to measure the masses of the N≈Z≈33 nuclides near the proton drip-line. Of particular interest is the mass of 65As. A maximum detection efficiency of 70% and a time resolution of 118±8ps (FWHM) have been achieved in the experiment. The dependence of detection efficiency and signal average pulse height (APH) on atomic number Z has been studied. The potential of APH for Z identification has been discussed.