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Related Experiment Videos

Triple point of nuclear deformations.

J Jolie1, P Cejnar, R F Casten

  • 1Institute of Nuclear Physics, University of Cologne, Zülpicherstrasse 77, 50937 Cologne, Germany.

Physical Review Letters
|October 26, 2002
PubMed
Summary

The study identifies a unique isolated point for second-order phase transitions in atomic nuclei, occurring at the junction of multiple first-order transitions. This finding provides the first empirical example of a nucleus at such a triple-point.

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Area of Science:

  • Nuclear physics
  • Theoretical physics
  • Condensed matter physics

Background:

  • Atomic nuclei can exhibit different shapes, transitioning between spherical and deformed states.
  • Phase transitions describe changes in these nuclear shapes.
  • Landau theory provides a framework for understanding phase transitions.

Purpose of the Study:

  • To theoretically identify the conditions for a second-order phase transition between spherical and deformed nuclear shapes.
  • To investigate the relationship between second-order and first-order phase transitions in atomic nuclei.
  • To propose an empirical example of a nucleus exhibiting a specific type of phase transition.

Main Methods:

  • Application of the Landau theory of phase transitions.
  • Analysis of the conditions required for a second-order phase transition.

Related Experiment Videos

  • Identification of junctions with first-order phase transitions, including the prolate-oblate transition.

    • Main Results:

    • The second-order phase transition between spherical and deformed nuclear shapes is shown to be an isolated point.
    • This isolated point arises only at the junction of two or more first-order phase transitions.
    • A specific type of nuclear structure is associated with this isolated point, requiring a prolate-oblate shape transition.

    Conclusions:

    • The theoretical framework explains the rarity and specific nature of this second-order phase transition.
    • The study suggests the first empirical evidence for a nucleus situated at this isolated triple-point.
    • This finding deepens the understanding of nuclear shape dynamics and phase transitions.