Atomic Nuclei - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Atomic Nuclei

The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform

T Papenbrock – 1st expert on this subject based on the ideXlab platform

  • effective field theory for deformed Atomic Nuclei
    Physica Scripta, 2016
    Co-Authors: T Papenbrock, H A Weidenmuller

    Abstract:

    In this paper, we present an effective field theory (EFT) for a model-independent description of deformed Atomic Nuclei. In leading order this approach recovers the well-known results from the collective model by Bohr and Mottelson. When higher-order corrections are computed, the EFT accounts for finer details such as the variation of the moment of inertia with the band head and the small magnitudes of interband E2 transitions. Finally, for rotational bands with a finite spin of the band head, the EFT is equivalent to the theory of a charged particle on the sphere subject to a magnetic monopole field.

  • effective field theory of emergent symmetry breaking in deformed Atomic Nuclei
    Journal of Physics G, 2015
    Co-Authors: T Papenbrock, H A Weidenmuller

    Abstract:

    Spontaneous symmetry breaking in non-relativistic quantum systems has previously been addressed in the framework of effective field theory. Low-lying excitations are constructed from Nambu–Goldstone modes using symmetry arguments only. In this study, we extend that approach to finite systems. The approach is very general. To be specific, however, we consider Atomic Nuclei with intrinsically deformed ground states. The emergent symmetry breaking in such systems requires the introduction of additional degrees of freedom on top of the Nambu–Goldstone modes. Symmetry arguments suffice to construct the low-lying states of the system. Lastly, in deformed Nuclei these are vibrational modes each of which serves as band head of a rotational band.

George Dracoulis – 2nd expert on this subject based on the ideXlab platform

  • exotic isomers in deformed Atomic Nuclei
    Hyperfine Interactions, 2001
    Co-Authors: P M Walker, George Dracoulis

    Abstract:

    Excited states of Atomic Nuclei can have long half lives, due to the angular-momentum couplings of unpaired nucleons. Such isomeric states provide opportunities for exploring novel nuclear physics, astrophysics and physics at the Atomic/nuclear interface. This review focuses on the properties of isomers in deformed Nuclei, and emphasises the importance of axial symmetry in preserving the integrity of the K quantum number. A region of neutron-rich Nuclei around 188Hf (Z=72, N=116) is predicted to have exceptional isomer properties, and experimental advances are now opening up this region to detailed investigation.

  • energy traps in Atomic Nuclei
    Nature, 1999
    Co-Authors: P M Walker, George Dracoulis

    Abstract:

    A small proportion of Atomic Nuclei can form highly excited metastable states, or isomers. Of particular interest is a class of isomers found in deformed axially symmetric Nuclei; these isomers are among the longest-lived and have the potential to reach the highest energies. By probing their properties, insights into nuclear structure have been gained. The possibility of stimulated isomer decay may ultimately lead to new forms of energy storage and γ-ray lasers.

H A Weidenmuller – 3rd expert on this subject based on the ideXlab platform

  • effective field theory for deformed Atomic Nuclei
    Physica Scripta, 2016
    Co-Authors: T Papenbrock, H A Weidenmuller

    Abstract:

    In this paper, we present an effective field theory (EFT) for a model-independent description of deformed Atomic Nuclei. In leading order this approach recovers the well-known results from the collective model by Bohr and Mottelson. When higher-order corrections are computed, the EFT accounts for finer details such as the variation of the moment of inertia with the band head and the small magnitudes of interband E2 transitions. Finally, for rotational bands with a finite spin of the band head, the EFT is equivalent to the theory of a charged particle on the sphere subject to a magnetic monopole field.

  • effective field theory of emergent symmetry breaking in deformed Atomic Nuclei
    Journal of Physics G, 2015
    Co-Authors: T Papenbrock, H A Weidenmuller

    Abstract:

    Spontaneous symmetry breaking in non-relativistic quantum systems has previously been addressed in the framework of effective field theory. Low-lying excitations are constructed from Nambu–Goldstone modes using symmetry arguments only. In this study, we extend that approach to finite systems. The approach is very general. To be specific, however, we consider Atomic Nuclei with intrinsically deformed ground states. The emergent symmetry breaking in such systems requires the introduction of additional degrees of freedom on top of the Nambu–Goldstone modes. Symmetry arguments suffice to construct the low-lying states of the system. Lastly, in deformed Nuclei these are vibrational modes each of which serves as band head of a rotational band.