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  • 软件简介: brief introduction

    改进的量子分子动力学(ImQMD)程序

    用途: 模拟近垒以及中能重离子碰撞, 研究核反应的微观动力学过程.

    This program (ImQMD) is to simulate heavy-ion collisions at low and intermediate energies,
    based on the improved quantum molecular dynamics (ImQMD) model.

    version:2.2
    Nov. 22, 2015

    Corresponding authors: Ning Wang, Zhuxia Li
    Emails: wangning@gxnu.edu.cn (N. Wang)
                 lizwux@ciae.ac.cn (Z. Li) 
    Website: http://www.ImQMD.com/code/    

    References:
    Ning Wang, Kai Zhao, and Zhuxia Li, Sci. China Ser. G - Phys. Mech. Astron. 58 (2015) 112001.
    Ning Wang, Li Ou,  Yingxun Zhang, and Zhuxia Li, Phys. Rev. C 89 (2014) 064601.
    Ning Wang, Zhuxia Li, Xizhen Wu, Junlong Tian, Yingxun Zhang, and Min Liu, Phys. Rev. C 69 (2004) 034608.

    attached two exe files "tt.exe" and "pot2.1.exe" are to see the movements of particles and to calculate the density distribution.
    As an example, "fusion_16O92Zr.dat" presents the calculated fusion cross sections for 16O+92Zr with "ImQMD2.2.exe"
    under the given input file (with Windows Operation System).

    INPUT FILE:
    ================================
    The first line: IFERMI,IFLAG1,IFLAG2,IFLAG3
    ---------------------------------------------------
    iFermi : Fermi Constraint   
                ---> 0 : without FermiC
                ---> 1 : with FermiC

    iflag1 : collsion control   
                ---> 0 : without collision
                ---> 1 : reduced collision
                ---> 2 : full collision
                ---> 3 : Pauli-block from PaPa

    iflag2 : reaction type      
                ---> 0 : test
                ---> 1 : fusion
                ---> 2 : multifragmentation
                ---> 3 : Qausi-fission
                ---> 4 : Strongly damped

    iflag3 : record xyz and pxyz  
                ---> 0 :  DO NOT record x,y,z and px,py,pz
                ---> N : call output at each N-time-steps, record x,y,z and px,py,pz
    ================================
    The second line: A2, Z2, A1, Z1 (mass and charge numbers of target and projectile)
    ================================
    The third line:   NT,DT, nrun    
    ---------------------------------------------------
    NT:  total time steps to simulate
    DT:  each time step  (default value: 1fm/c)
    nrun: number of simulation events at each energy and each impact parameter
    ================================
    The fourth line:  bmin,bmax,db
    ---------------------------------------------------
    bmin:   minimal impact parameter
    bmax:  maximal impact parameter
    db:  step size for impact parameter
    default values for fusion reaction: bmin=1, bmax=12, db=1
    ================================
    The fifth line:  EcmL,EcmH,dEcm
    ---------------------------------------------------
    EcmL:    minimal incident energy at center-of-mass frame 
    EcmH:   maximal incident energy at center-of-mass frame
    dEcm:  step size for incident energy
    ================================
    The sixth line:  ALPHA,BETA,GAMMA,symtry,GRADI,gtau,eta,cks,rho0,c0,c1,gtaus, ct1, ct2, ct3
    ---------------------------------------------------
    model parameters adopted for Hamiltonian
    gtaus: the coefficient of the symmetry potential for the non-linear density dependence part (default value 0)
    ct1, ct2, ct3: the corresponding cofficients of Thomas-Fermi kinetic energy, which don't influence the simulation process.
    ================================
    The seventh line:   d00, iseed
    ---------------------------------------------------
    d00: initial distance at beam direction (z-axis)
    (default value 30fm for light and intermediate systems and 40fm for heavy systems)
    iseed: intial random seed  (iseed<0, to repeat selected events, with the file seed.dat)
    ================================
    The eighth line:          Nrepeat, FCC
    ---------------------------------------------------
    Nrepeat:      The maximal times to re-perform the two-body elastic scattering in Fermi constraint at each time
    FCC:           Transfer factor for inelastic scattering adopted in Fermi constraint
    (For heavy-ion collisions, the value of  FCC should be adjusted to guarantee the conservation of energy of the system)
    -------------------------------------------------------------------------------

    Example I: for fusion reaction 16O+92Zr

    1,  0,  1,  0

    92,  40,  16,  8

    2000, 1, 100 

    1,  12, 1

    60,  40,  -2

    -0.207, 0.138, 1.16666, 0.034, 0.0165, 0.0140, 1.6666, 0.4, 0.165,  0.94, 0.020, 0,  0.0124,  0.001 ,  0        IQ3a

    30 ,  0

    4,   5E-6

    The fusion cross sections are recorded in "fusion.dat"
    ------------------------------------------------------------------------------

    Example II: for multifragmentation  197Au+197Au at 35AMeV and b=1fm

    1,  0,  2,  500

    197,  79,  197,  79

    3000, 1, 1000

    1,  1,  1

    3447.5,  3447.5,  -5

    -0.207, 0.138, 1.16666, 0.034, 0.0165, 0.0140, 1.6666, 0.4, 0.165,  0.94, 0.020, 0,  0.0124,  0.001 ,  0        IQ3a

    80 , 2000

    4,   5E-6

    The charge and mass distributions are recorded in "cluster.dat"
    The isotopic distributions are recorded in "isotope.dat"

    ------------------------------------------------------------------------------

    Example III: to test the stability of an individual nucleus 92Zr  at t=2000fm/c

    1,  0,  0,  5

    92,  40,  0,  0

    2000, 1, 200

    1,  1,  2

    80,  80,  -5

    -0.207, 0.138, 1.16666, 0.034, 0.0165, 0.0140, 1.6666, 0.4, 0.165,  0.94, 0.020, 0,  0.0124,  0.001 ,  0        IQ3a

    40 , 0

    4,   5E-6

    The binding energies per particle and rms radii are given in "rms.dat"

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