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《中国物理C》(英文)编辑部
2024年10月30日

1978 Vol. 2, No. 5

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Review
PROPAGATION EFFECTS OF SOLAR COSMIC RAYS
CHANG KONG-LIANG
1978, 2(5): 385-393.
Abstract:
Computer calculations have been made on the dimensional solution to the anisotropic diffusion convection equation for solar cosmic rays propagating in an uniform and unbounded interplanetary medium. This paper presents the results calculated by means of Jokipii's diffusion coefficients. Discussion is restricted to the influences of solar wind convection on the rise to maximum times and on the peak intensities of solar cosmic ray events with solar corotation effect taken into consideration. The model well explains the asymmetrical variations of the propagation charateristics of the events with solar longitudes of their parents flares relative to the interplanetary magnetic field lines passing through the earth, and the theoretical curves of the rise times fit satisfactorily the observations of solar events ranging from relativistic to about 30 MeV medium energies.
SU(4)×S3α SCHEME OF STRATON MODEL AND THE NEWLY DISCOVERED HEAVY PARTICLE γ(9.5)
GAO CHUNG-SHOU
1978, 2(5): 394-402.
Abstract:
In this paper, the possibility that the newly discovered heavy particle γ (9.5) is a colour excited state of mesons in the SU(4)×S3α scheme of straton model is discussed. We point out that in the γ region, there are three colour excited states appearing as two peaks with mass difference about 0.5 GeV. The leptonic decays, hadronie decays, radiative decays, hadronic decays with electromagnetic interaction of the second order and the production behavior of γ are discussed. This model also predicts that many colour excited states of mesons accompanied with γ should exist with masses around 9.5 GeV and at least four weakly decaying particles should exist.
ON THE SU(4) MONOPOLE AND DYON SOLUTIONS
WANG KE-LIN, HSIEN TING-CHANG, CHENG HSI-THE
1978, 2(5): 403-410.
Abstract:
A simple method is proposed to obtain the classical monopole and dyon solutions in the case of SU(4) symmetry, which can be systematically generalized to the general case of SU(N). The solutions obtained in the SU(4) case correspond to magnetic charges of ±1/g,±3/(2g),±1/(√2g).
BACK-WARD POTENTIAL SCATTERING AT HIGH ENERGIES
CHIANG HUAN-CHING, LI YANG-KUO
1978, 2(5): 411-416.
Abstract:
A simpler approximate formula to describe backward potential scattering at high energy is derived by neglecting the transverse monmentum transfer in the Green's propagator and, as examples, the numerical results are compared with the exact solutions.
THE VERTICAL INTEGRATED MOMENTUM SPECTRUM OF THE MUON WITH MOMENTUM LARGER THAN 4 GeV/c AT 3220m ABOVE SEA-LEVEL
JING GUI-RU, HUO AN-XIANG, YAN YU-KUI, WANG LI-AN, LI YAN-GUO, SU DENG-JI, MENG XIANG-CHENG, YAO WEI-ZHONG, ZHOU YIN-ZAO, PENG SHAO-HUA, WANG LI-HUI
1978, 2(5): 417-422.
Abstract:
At an altitude of 3220 meters above sea level in Yunnan Province, we measured, by using a G-M counter-magnetic spectrometer, the vertical integratted momentum spectrum of the cosmic muon with momentum larger than 4 GeV/c. The spectrum obtained from this experiment is expressed by a power function in the form of I(>p)=Qp+4)-1.86±0.06(cm-2·sr-1·s-1), where p is in GeV/c and Q is a constant. We also measured the charge ratio of muon in the 4—23 GeV/c momentum range. The result is Nμ/Nμ-=1.26±0.11. The error in the momentum measurement with spectrometer has been discussed and calculated.
THE NEGATIVE-POSITIVE RATIO OF CHARGED COSMIC RAY HADRONS AT THE 3220 m ABOVE SEA-LEVEL
XU CHUN-XIAN, HUO AN-XIANG, YUAN YN-KUI, GU YI-DONG, LI TI-PEI, SHEN PEI-RO, JIA GUEI-BIN, XIAO QIAN-YI, ZHANG CHENG-MO, CHEN DUAN-BAO
1978, 2(5): 423-427.
Abstract:
Single tracks of unaccompanÏed charged hadrons, within a horigontal area of 0.23m2 have been measured with a magnetic spectrometer, a pre-selector of momentum in combination with a multiplate cloud chamber in a laboratory at 3220m above sea level. Taking various possible corrections into account, the negative-positive ratio of charged hadrons was obtained as N-/N+=0.53±0.05 in the momentum range of 10-20 GeV/c. If we considered N+ contained only P and π+, N-were π-and that Nπ+/Nπ-=1, we deduced the result Nπ-/Np=0.9±0.1. Taking the form of the π-integral spectrum as j(>p)=Kp-γ, it was estimated that γ(?)2.3 in the momentum range 5—20 GeV/c. In this paper the integral verticel flux intensity of all charged hadrons was also estimated roughly, the result is:jp+π(>12 GeV/c)=(7.4±0.7)×10-5/cm2·sг·s.
ON
ZENG JIN-YAN
1978, 2(5): 428-440.
Abstract:
Formulae for the nuclear pairing-rotational (p.r.) and pairing-vibrational (p.v.) spectra are obtained using the PNC (particle-number-conserving) method. The quentum numbers characterizing the p.r. band, the braching ratios and the selection rule for two-particle transfer reactions are given. It is shown that the pairing-rotational scheme holds even for those nuclei near closed-shell, provided that the major-shell is not crossed. The anharmonic p.v. spectrum is shown to be equivalent to two sets of p.r. bands. The physical meaning of the parameters occuring in the p.r. and p.v. spectra is discussed.
INELASTIC SCATTERING OF THERMAL NEUTRONS BY METAL HYDRIDES ZrH1.66 AND TiH1.92
EUAN JING-HUI, CHENG ZHI-SHIUH, CHEN GUI-YING, LI ZHU-CHI, LU TING, WU SHAN-LING
1978, 2(5): 441-449.
Abstract:
Inelastic scattered neutron spectra of metal hydrides ZrH1.66 and TiH1.92 have been measured by beryllium filter detector spectrometer and their phonon spectra have been deduced from the neutron spectra according to the A. Sjölander formula by iterative method. The optical branches of the two samples thus obtained are approximately Gaussian distributions and their positions are in agreement with other works, while their PWHM are smaller than the value uncorrected for multiphonons effect reported elsewhere. Their acoustic branches obtained are of neither Debye nor Gaussian type but show a double-numped configurations. Some new configurations have been observed between the optical and acoustic branches which may be attributed to localized modes as a result of disorder.
ELASTIC SCATTERING OF FAST NEUTRONS FROM Fe, Cu AND Pb
NEUTRON PHYSICS GROUP OF NUCLEAR PHYSICS LABORATORY
1978, 2(5): 450-460.
Abstract:
Using time of flight technique the elastic differential cross sections were measured for neutrons from natural Fe, Cu, and Pb in the energy range 1.10 to 1.40 MeV.The effect of neutron attenuation and multiple scattering in the sample is corrected by extrapolation of the experimental results. The correction of scattering angles due to the finite source-sample-detector geometry is also considered. The measured elastic differential cross sections are expressed by Legendre polynomial expansions, from which the total cross sections are obtained.The Optical-Model Calculations are carried out which show a reasonable consistency with the measured values.
THE CLASSIFICATION OF BARYONS IN THE STRATON MODEL
HU NING
1978, 2(5): 461-467.
Abstract:
THE EFFECTIVE INTERACTION BETWEEN THE NUCLEON AND THE ISOBAR
YU YON-WEN, WU WEI-FANG
1978, 2(5): 468-470.
Abstract:
THE FIELDCURRENT RELATIONS FOR BARYONS AND THE PROCESS p+n→n+K+Λ
HO TSO-HSIU, HUANG TAO
1978, 2(5): 471-475.
Abstract:
A NEW WAY FOR SENSITIZING CELLULOSE ACETATE SOLID STATE TRACK DETECTOR
CHU RUN-SHENG
1978, 2(5): 476-477.
Abstract:
PRELIMINARY MEASUREMENT OF THE ANTIPROTON COMPONENT IN COSMIC RAYS AT A 3220m ALTITUDE
YUAN YU-KUI, HUO AN-XIANG, ZHANG CHANG-CHUN, QIN KE-YU, ZHU AI-MIN, ZHANG REN-QING, GUO KE-ZUN, YANG CHANG-TOU, LI QIN-LIAN, FAN SHI-HE
1978, 2(5): 478-480.
Abstract: