[en] Using the Glauber theory and based on an independent alpha particle model, we have calculated the differential cross sections of π^---¹⁶O elastic scattering at three incident energies of the pion (T_π = 110, 180, 220 MeV). We have used two-body amplitude F_pialpha as the basic input to parametrize the semi-empirical equation. The parameters can be obtained by fitting the π-α elastic scattering data. Our results are in good agreement with the experimental data and the extent of agreement is comparable to that obtained in the previous optical potential calculations using pion-nucleon amplitude as input

[en] The ground state of ²⁰Ne is described as the clustering structure of α+¹⁶O. The cluster wave function with an analytical and simple form is presented. Based on this model, the intermediate-energy proton-²⁰Ne elastic scattering is calculated and compared with the experimental data. (orig.)

[en] This paper presents the design, fabrication, and performance of a compact high temperature superconducting duplexer at VHF-band. The duplexer consists of a T-junction and two four-pole filters with an ultra-narrow bandwidth of 400 kHz at 216 MHz and 220 MHz, respectively. By using gap-coupled feedlines in the filter design procedure, the duplexer is constructed by connecting the two filters using a T-junction with short-length branches. The two filters are fabricated on separate substrates and are carefully packaged to achieve a high isolation between the duplexer channels. The duplexer has a compact size of 41.6 mm x 28 mm. The measured results at 73 K show a high performance. The return loss is -17 dB, the insertion losses of both channels are less than 0.16 dB, and the out-of-band rejections are higher than 60 dB. The isolation between the two channels is better than 76 dB.

[en] The folding model for the ³He elastic scattering on ¹²C is constructed based on the three α-particle model of the nucleus ¹²C. This folding model can well describe the differential cross-sections of the ³He + ¹²C elastic scattering in the energy range from 10 to 200 MeV

[en] This paper presents a high-temperature superconducting filter at 7.42 GHz with an improved upper-stopband performance. U-type stepped-impedance resonators are used to relocate the spurious frequency and realize wide stopband response. The compact resonators also reduce the filter size and push away the housing box resonant frequencies. Open stubs are introduced at the midpoints of the resonators to provide additional transmission zeros, which can improve both the band-edge steepness and the out-of-band rejection of the upper stopband. As a result, the spurious response of the filter is relocated to above 18 GHz, and the out-of-band rejection is higher than 70 dB.