1982年, 第1卷, 第1期　
刊出日期：1982-01-30

  

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  IONIZATION OF THE HYDROGEN NEGATIVE ION MOVING IN A UNIFORM MAGNETIC FIELD

  吴礼金

  理论物理通讯. 1982, 1(1): 1-9.

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  The ionization of the travelling hydrogen negative ion with high velocity in a uniform magnetic field is discussed by using perturbation theory in the first approximation. The choice of the H -ion wave function is illustrated with emphasis. And it is shown that various wave functions of the H-ion affect calculation results. The theoretical cal-culation by using Rotenberg-Stein wave function with five parameters is consistent with the experimental results ob-tained by G. M. STINSON et a1. in 1969.
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  IS THE NEUTRINO MASS EQUAL TO 34 eV?--A DISCUSSION OF THE ATOMIC EFFECT IN THE β-DECAY OF H³

  庆承瑞, 何作麻

  理论物理通讯. 1982, 1(1): 11-18.

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  In evaluating the β-spectrum of atomic H³ a more accurate formula is obtained. in which the first three transitions leading to the Lowest three states of ³He⁺ are treated exactly, and the cJosure approximation is used to estimate the contribution from all excited states with n>3.The formula obtained is compared with what is used by Lyubimov et al.^[1] in determining the neutri-no mass. As a result it has been shown that the formula used by Lyubimov et al. does not yield an adequate accuracy. Especially the end-point energy they obtained may differ from the true value by 13.6 ev, which would cause an uncertainty of the same order inthe value of the neutrino mass.
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  MULTIPHONON SURFACE PROCESSES

  孙和璧, 蔡建华

  理论物理通讯. 1982, 1(1): 19-25.

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  In catalysis and other surface phenomena, besides affording static influences, such as modifications in energy spectra and wave functions of atoms and molecules in chemisorbed states in contrast with those in free states, the substrate may also show its existence by participating the dynamics. The present article intends to call attention to a class of multiphonon processes which may play a role not to be ignored. The mechanism is explained throagh'the discussion of a few examples.
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  THE LINEAR ELIASHBERG EQUATION

  吴杭生, 顾一鸣, 茅德强

  理论物理通讯. 1982, 1(1): 27-36.

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  Fn the present paper, the linear Eliashberg equation is converted into a new integral equation and from it, the following T_C formula is derived analytically in the weak coupling limit:T_c=28/πωlog·(πlog/π_c)μ^*/λ^*-μ^* exp{-1+λ/λ-μ^*}, where In γ=C=0.5772 is the Eater constant.
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  SINGULAR PERTURBATION EXPANSION FOR MARKOVIAN MASTER EQUATIONS

  丁鄂江

  理论物理通讯. 1982, 1(1): 37-48.

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  Asymptotic properties of the master equations for chemical reactive systems whose macroacopic rate equations have more than one stationary state are discussed Itsing generating function method. The systematic singular perturbation expansion method for equation of generating function is generalized to include the case of multi-stationary system beyond the bifurcation point and the following conclusions are proved: For such systems, there is a Gaussian fluctuation before next genuine bifurcation point] a critical fluctuation at a genuine bifurcation point; and a macroscopic fluctuation when the system is on the coexistence line which is determined by the master equation. Furthermore, the relation between the cumulant of generat-ing function and the stochastic potentia 1 is also established. Our discussion, however, is limited to homogeneous system of one variable only.
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  HIGH ENERGY SCATTERING THEORY OF MANY-0ARTICLE SYSTEM

  阮图南, 王潍潍, 李扬国, 张禹顺

  理论物理通讯. 1982, 1(1): 49-58.

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  Within the framework of the Glauber Theory, we divide the many-particle system into two subsystems, formed by the "Valence" particles and the "Sea" particles respectively. Then the multiple scattering amplitudes can also be divided into "sea" - "sea", "sea" - "valence","valence" - "sea", and "valence"- "valence" multiple scattering amplitudes. For the calculation of these different amplitudes, different effective approximate methods are proposed.Finally, the S matrix for the "sea" - "sea ", "sea" - "valence";"valence" - "sea" and "valence" - "valence" processes is, obtained which is physically clear and convenient in calculation.
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  MASS SPECTRA OF SEW PARTICLES

  胡宁

  理论物理通讯. 1982, 1(1): 59-67.

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  Whenφ(4030) is considered as a molecule formed from D^* and D^* and not as an excited states of J/φ,then all excited states of J/φ may be described by a wave equation of simple harmonic oscillator, with eigen-values equal to the squared masses of these states. The same conclusion is also obtained for γ particles.
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  NEB NONLINEAR σ MODELS ON SYMMETRIC SPACES

  周光召, 宋行长

  理论物理通讯. 1982, 1(1): 68-75.

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  Two new nonlinear σ models, defined on the symmetric coset spaces GL (n,c). ⊕ GL(n,c)/GL (n,c) and GL (n,c)/U(n) respectively, are formulated in this paper.The latter may be useful in discus-sing the four-dimensional Yang-Mills fields.
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  THE INFLUENCES OF MASSIVE NEUTRINO ON THE CLUSTERING IN THE EARLY UNIVERSE

  方励之, 刘永镇

  理论物理通讯. 1982, 1(1): 77-85.

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  The influence of massive neutrino upon the clustering processes of cosmological matter in the early Jeans instabi-lity stage has been studied in the standard big bang theory.
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  TNEOREMS ON AMPLIFICATION OF FLUCTUATIONS AND THEIR BIOLOGICAL IMPLICATIONS

  黄惠慈

  理论物理通讯. 1982, 1(1): 87-95.

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  Three theorems on amplification of fluctuations at nonequi-librium are proposed: (1) Amplification of a fluctuation is possible within a closed system. (2) The second-order time derivative of Boltzmann's B-quantity may contain terms of nega-tive value. (3) An H-theorem for open systems.It is pointed out in the paper that the fact that micros-copic transition rates are not all identical constitutes the basis of the theorems proposed. And this nonidenticalness is also a fundamental reason why phenomena defying the thermody-namic law in an apparent way (such as life) exist in the course of evolution. It is also pointed out in the paper that at states far from thermal equilibrium it is "selection" instead of "averaging" that works in the statistics of the quantum states. Finally it is speculated that certain key biomolecules such as ATP are situated at Long Zifetime excited states, thus at states far from thermal equilibrium. The biomolecules are large fluctuations produced or amplified during a relaxation process starting from an extreme initial state (even further from equilibrium),and stabilized by solar radiation in the present day. Again, selection takes the place of an averaging which is artificial and which Ievels out the whole set of transition rates.
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  A COUPLED CHANNEL COMPUTING CODE FOR NEUTROM-NUCLEUS REACTIONS

  严柏龄

  理论物理通讯. 1982, 1(1): 97-106.

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  A method of calculating the coupled channel schrodinger equations is described and the structure of the computing code is given.
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  I-N-A PHASE DIAGRAMS OF LIQUID CRYSTALS

  舒昌清, 林磊, 王良御

  理论物理通讯. 1982, 1(1): 107-110.

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  The isotropic liquid (I) ⊥ nematic (N) ⊥ smectic A(A) phase diagrams of homologous series of liquid crystals obtained experimentally may be divided into at least 4 types (Fig. la-d) according to the characteristic behavior of T_NI.
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  HIERARCHY OF CHAOTIC BANDS AND PERIODICITIES EMBEDDED IN THEM IN A FORCED NONLINEAR OSCILLATOR

  郝柏林, 张淑誉

  理论物理通讯. 1982, 1(1): 111-115.

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  Secondary direct and inverse bifurcation sequences exist in the chaotic bands of the primary inverse sequence. In secondary chaotic bands periodicities of the tertiary appear. This has been shown numerically in the forced Brusselator.