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  • 1
    Electronic Resource
    Electronic Resource
    Production of heavy atomic clusters upon interaction of laser radiation with matter (1997)
    Springer
    Journal of experimental and theoretical physics 85 (1997), S. 42-47 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The results of an investigation of the formation of Pb, Th, and U clusters over a broad range of numbers of atoms (from a few atoms to macroparticles) upon interaction of high-power pulsed laser radiation with matter are presented. Clusters of fissionable elements are studied for the first time. A setup for determining the yield of clusters and the number of atoms in them, which is based on the use of several different methods (laser resonance fluorescence, time-of-flight measurements, and counting the number of tracks of fission fragments from the cluster nuclei), is described. The dependence of the yield of clusters with various numbers of atoms on the conditions for their formation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558313
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  • 2
    Electronic Resource
    Electronic Resource
    Particle number projecting method for the description of pairing effects in metal clusters (1996)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 18 (1996), S. 645-654 
    Details
    ISSN: 0392-6737
    Keywords: BCS theory ; applications ; Atomic and molecular clusters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The particle number projecting method for the description of pairing effects in metal clusters is proposed. In contrast with the Bardeen-Cooper-Schrieffer method (BCS) which does not conserve the particle number (thus not providing the necessary accuracy of calculations for small clusters) and has no solutions at sufficiently weak pairing, the projecting method can be applied to both small and large clusters with any pairing strength. As an example, the projection method is used to check the assertion on the pairing origin of the odd-even staggering (OES) in the ionization potentials (IP) of sodium clusters. Both effects of pairing and shape deformation are taken into account simultaneously. In general, the results obtained show that the existence of pairing in sodium clusters is doubtful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02453255
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  • 3
    Electronic Resource
    Electronic Resource
    One-phonon states in deformed nuclei with isoscalar and isovector interactions (1977)
    Springer
    Theoretical and mathematical physics 32 (1977), S. 646-652 
    Details
    ISSN: 1573-9333
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01041442
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  • 4
    Electronic Resource
    Electronic Resource
    On vibrational states in deformed odd-A nuclei (1983)
    Springer
    The European physical journal 309 (1983), S. 353-361 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The equations for the description of vibrational states in deformed odd-A nuclei are obtained within the quasiparticle-phonon nuclear model. In these equations the Pauli principle is taken into account in the quasiparticle plus phonon components of the wave functions. It is shown that if in these components the Pauli principle is not violated or is slightly violated, the corresponding vibrational states may exist in deformed odd-A nuclei. If the Pauli principle is strongly violated in the quasiparticle plus phonon state, its centroid energy is shifted towards higher energies, and it can be fragmented over several levels. The analysis of the available experimental data on the low-lying vibrational states in deformed odd-A nuclei has shown that the experimental data do not contradict the results of these calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413839
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  • 5
    Electronic Resource
    Electronic Resource
    On the coupling between multiphonon configurations in deformed nuclei (1990)
    Springer
    The European physical journal 335 (1990), S. 147-151 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.-n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The simplified microscopical multiphonon model (SMMM) convenient for the qualitative analysis of the interaction between multiphonon configurations in deformed nuclei is derived. The numerical estimates are given. The question on the low-lying two-phonon states in deformed nuclei is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294469
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  • 6
    Electronic Resource
    Electronic Resource
    Microscopic description of vibrational degrees of freedom in odd-odd isotopes of Ho (1992)
    Springer
    The European physical journal 343 (1992), S. 145-159 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.−k ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The microscopic approach for the description of low-lying intrinsic states in deformed odd-odd nuclei is formulated as a generalization of the quasiparticle-phonon model. In comparison with other models used for deformed odd-odd nuclei, the approach proposed in this paper involves vibrational degrees of freedom of the doubly-even core, their coupling to quasiparticle degrees of freedom and then-p interaction between the odd particles. Our model treats all of these modes of nuclear motion on the same microscopic footing. This proposed model is applied to calculate the energies and phonon-quasiparticle structure of the intrinsic states of the odd-odd Ho isotopes withA=160, 162, 164, 166 and 168. It is found that the low-lying intrinsic states in the odd-odd Ho isotopes have only small vibrational components. In general the vibrational states are fragmented over many intrinsic states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291819
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  • 7
    Electronic Resource
    Electronic Resource
    Description of low-lying states in odd-odd deformed nuclei taking account of the coupling with core rotations and vibrations I. Theory (1991)
    Springer
    Czechoslovak journal of physics 41 (1991), S. 345-358 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A microscopic approach in the description of low-lying states in deformed odd-odd nuclei is formulated as a generalization of the quasiparticle-phonon model (QPM) including the rotational degrees of freedom and the n-p interaction between external nucleons. In comparison with other models, the approach proposed includes all the three most important ingredients (the coupling with rotational and vibrational degrees of freedom of doubly-even core and the n-p interaction mentioned above) and treats them on the same microscopic footing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01599035
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  • 8
    Electronic Resource
    Electronic Resource
    On the role of the coriolis and quasiparticle-phonon interactions in describingE1 transition probabilities in odd Eu and Tb isotopes (1988)
    Springer
    The European physical journal 331 (1988), S. 265-275 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.−n ; 23.20.−g ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown within the microscopic approach combining the quasiparticle-phonon nuclear model and the nonadiabatic rotational model (QPNM + NRM) that a complicated behaviour of E1 transitions in nuclei153,155Eu and155,157Tb can be described only if both the Coriolis and quasiparticle-phonon interactions are taken into account. In contrast with the results obtained in the NRM allowing for pairing and the Coriolis forces only, QPNM + NRM calculations provide a considerable increase inE1(ΔK=0) transitions whereasE1(¦ΔK¦=1) transitions can undergo either increase or essential decrease. We also describe the low-lying states of the considered nuclei and demonstrate the decisive role of the giant dipole resonance “tail” inE1 transitions between the low-lying states. The obtained results are analysed in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01355596
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  • 9
    Electronic Resource
    Electronic Resource
    CollectiveEλ excitations of surface character in spherical and deformed sodium clusters: vibrating potential model (1995)
    Springer
    The European physical journal 34 (1995), S. 271-282 
    Details
    ISSN: 1434-6079
    Keywords: 71.45.-d ; 36.40. + d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The self-consistent vibrating potential model (VPM) is extended for the description ofEλ surface collective excitations in alkali metal clusters with practically any kind of static deformation. The case of spherical clusters is also covered. Any single-particle potentials and valence electron densities for which the coefficients of the multipole expansion are known can be used within the model. The strength function method incorporated into the model allows one to avoid solving the equations for every state and, as a result, simplifies the calculations drastically. The model is of a quite general character and can also be used for description of giant resonances in atomic nuclei if the Coulomb terms are neglected. The VPM is applied to calculate theE1,E2 andE3 excitations in spherical (Na8, Na20 and Na40) and deformed (Na10, Na18 and Na26) clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437573
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  • 10
    Electronic Resource
    Electronic Resource
    Orbital magnetism in axially deformed sodium clusters (2003)
    Springer
    The European physical journal 27 (2003), S. 43-53 
    Details
    ISSN: 1434-6079
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Low-energy orbital magnetic dipole excitations, known as the scissors mode (SM), are studied in alkali metal clusters. Subsequent dynamic and static effects are explored. The treatment is based on a self-consistent microscopic approach using the jellium approximation for the ionic background and the Kohn-Sham mean field for the electrons. The microscopic origin of SM and its main features (structure of the mode in light and medium clusters, separation into low- and high-energy plasmons, coupling high-energy M1 scissors and E2 quadrupole plasmons, contributions of shape isomers, etc.) are discussed. It is shown that the scissors M1 strength acquires large values with increasing cluster size. The mode is responsible for the van Vleck paramagnetism of spin-saturated clusters. Quantum shell effects induce a fragile interplay between Langevin diamagnetism and van Vleck paramagnetism and lead to a remarkable dia-para anisotropy in magnetic susceptibility of particular light clusters. Finally, several routes for observing the SM experimentally are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjd/e2003-00234-2
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