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  • 24.50.+g  (1)
  • PACS. 68.35.Fx Diffusion; interface formation - 05.70.Ln Nonequilibrium and irreversible thermodynamics - 61.43.Dq Amorphous semiconductors, metals, and alloys  (1)
  • Stationary nonequilibrium states  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Mechanism of reactions induced by 7 MeV deuterons on9Be [(d, p), (d, d), (d, t), (d,4He)] (1989)
    Springer
    The European physical journal 333 (1989), S. 271-279 
    Details
    ISSN: 1434-601X
    Keywords: 24.50.+g ; 24.60.+ m ; 25.50.−n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular distributions of protons, deuterons, tritons and alpha-particles emitted from the reactions in thed+9Be-system atE d =7 MeV as well as excitation functions at selected angles in the energy rangeE d =6.5–7.5 MeV (LAB) were measured. The potential part of the elastic scattering is described by the phenomenological optical model. The compound nucleus contribution to all exit channels is determined using the Hauser-Feshbach model. The collective excitation of the 2.43 MeV excited state of9Be and transfer processes are analysed within the DWBA formalism. The analyses suggest a significant contribution of five-nucleon transfer to the (d,4He) channel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294515
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  • 2
    Electronic Resource
    Electronic Resource
    Diffusion and electromigration on disordered surfaces (2000)
    Springer
    The European physical journal 16 (2000), S. 345-353 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 68.35.Fx Diffusion; interface formation - 05.70.Ln Nonequilibrium and irreversible thermodynamics - 61.43.Dq Amorphous semiconductors, metals, and alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We study a one-dimensional disordered solid-on-solid model in which neighboring columns are shifted by quenched random phases. The static height-difference correlation function displays a minimum at a nonzero temperature. The model is equipped with volume-conserving surface diffusion dynamics, including a possible bias due to an electromigration force. In the case of Arrhenius jump rates a continuum equation for the evolution of macroscopic profiles is derived and confirmed by direct simulation. Dynamic surface fluctuations are investigated using simulations and phenomenological Langevin equations. In these equations the quenched disorder appears in the form of time-independent random forces. The disorder does not qualitatively change the roughening dynamics of near-equilibrium surfaces, but in the case of biased surface diffusion with Metropolis rates it induces a new roughening mechanism, which leads to an increase of the surface width as .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510070235
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The fast rate limit of driven diffusive systems (1986)
    Springer
    Journal of statistical physics 44 (1986), S. 535-565 
    Details
    ISSN: 1572-9613
    Keywords: Stationary nonequilibrium states ; driven lattice gas ; van Kampen'sΩ-expansion ; Maxwell construction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study the stationary nonequilibrium states of the van Beijeren/Schulman model of a driven lattice gas in two dimensions. In this model, jumps are much faster in the direction of the driving force than orthogonal to it. Van Kampen's Ω-expansion provides a suitable description of the model in the high-temperature region and specifies the critical temperature and the spinodal curve. We find the rate dependence ofT c and show that independently of the jump rates the critical exponents of the transition are classical, except for anomalous energy fluctuations. We then study the stationary solution of the deterministic equations (zeroth-orderΩ-expansion). They can be obtained as trajectories of a dissipative dynamical system with a three-dimensional phase space. Within a certain temperature range belowT c, these equations have a kink solution whose asymptotic densities we identify with those of phase coexistence. They appear to coincide with the results of the “Maxwell construction.” This provides a dynamical justification for the use of this construction in this nonequilibrium model. The relation of the Freidlin-Wentzell theory of small random perturbations of dynamical systems to the steady-state distribution belowT c is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01011309
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    Paper (German National Licenses)
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