1987 Vol. 11, No. 3
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The experimental method of calibrating chaoyang No.1 polycarbonate solid state nuclear track detector using heavy ions is reported. V vs REL response curves and empirical formulae for six etching conditions are also given.
The gamma rays emitted from three photon annihilation of positrons and electrons were selected with a triple coincidence method and the linear polarization of one of the three photons was investigated by using Compton scattering. Under two geometric ...
The two dimensional drift chamber was formed by gluing a delay-line in a MIT-Harvard type drift chamber. An average drift velocity about 3.34cm/μs was obtained when the chamber was operated at plateau region and filled with P-9 gas. Its average space...
Tests on the read out of the second coordinate (along the anode wire) of the MIT-Harward-type drift chamber by using a Naples type flat solenoieal delay line were conducted. Spatial resolution of 2~5mm and linearity better than 1% were obtained along...
In this paper Indium active detector is suggested to measure the pulsed neutrons around Electron Lanic. It can be hopefully expected to have correcrt dose response of detector in the short pulsed neutron field, high resolution ability of the neutrons...
A gas sampling Em Shower counter of the lead-SQS tube sandwich type was constructed and tested. The Shower counter uses Aluminium tubes and anode readout. Energy resolution σ/E is 15.5% at Ee=1GeV. Range of the energy response linearity is 0—2GeV. Th...
The BES barrel shower counter prototype was tested with electron and pion beam in the momentum range from 0.2 to 2.0GeV/c at 12GeV PS test beam line of KEK, the preliminary results were reported. Four types of gas mixtures which were used in prototyp...
A new phenomenological potential model on interaction between quark and antiquark is proposed by the hint of QCD and experimental data. Spectroscopies, leptonic decay and electromagnetic transition widths of the heavy quarkonia, cc, bb and tt, are ca...
A Scheme of quantum treatment for transition radiation is proposed. The Fresnel coefficients are adopted to describe the stationary states of electromagnetic fields near the interface between two mediums before a canonical field quantization procedur...
A systematic study of the evolution pattern of symmetries in the Pati's minimal superstring preon model is presented. It is thought that this pattern more preferable than the original one.
In this paper the quark self-energy with nolocal quark-pion interaction is calculated and the convergent self-energy is obtained. Based on the results it is found that the divergence is merely due to the assumption of pointlike pion made in the calcu...
In this paper,the magnetic field distribution of the modulating width multipole permanent magnets is analyzed. Only radially magnetized permanent magnet segments are used and the required magnetic field is formed by modulating the widths of the segme...
The 12 cumulative yields and 7 independent yields in the symmetric region were determined in the fission of 232Th induced by 14.7MeV neutrons with nuclear chemistry techniques. The independent yields of the present work, along with the independent yi...
The choice and representation of degrees of freedom of collective motions are thoroughly discussed. Starting from the dynamical group of a shematic model, it is pointed out that the number of independent collective degrees of freedom is uniquely dete...
The partially violated U(3) limits of the U(6/12) model is presented. The theoretical predictions are compared with existing experimental data of energy spectra and B(E2). The theory tallies with experiment fairly good.
By using the Double Delta Interaction (DDI) and the Modified Surface Delta Interaction (MSDI) as the effective interaction respectively and by the mixed-configuration, the low-lying spectra of oxygen isotopes 17-22O in the (s-d) shell space are calcu...
The condensation probability γβ is studied by assuming that γβ=γβ(A, E)[εβ/MeV]χ When χ=0.425, the best agreement between the calculated dσ/dε and the experimental data is obtained for 18 reactions. For the same composite systems, the extracted γβ(A,...
On the bases of s, d IBM, octupole states are taken into account and the two-quasiparticle excitation is treated as boson-like in the SU(3) limit. The energy spectra are obtained analytically and the nondegenerated 1+ and 3+ bands are also reproduced...
HIRFL magnetic field measuring system was built in October, 1983. There are 94 Hall probes on a detecting arm. The positioning device, which mainly consists of a detecting arm, a rotating ring and a fixed ring, is of a polar coordinate type. For 16KG...
In this letter it is shown that even in mπ≠0 case the Goldberger-Treiman relation is still hold in the Skyrme model. The mean square radius of strong interaction of nucleon <r
The influence arising from overall energy conservation kinematics modification on the impulse approximation is discussed. It is found that this kinematics modification plays an important role in both deep inelastic lepton nucleon scattering and deep ...
ISSN 1674-1137 CN 11-5641/O4
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