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Multiple Shape Coexistence in ^{110,112}Cd.

P E Garrett1,2, T R Rodríguez3, A Diaz Varela1

  • 1Department of Physics, University of Guelph, Guelph, Ontario N1G2W1, Canada.

Physical Review Letters
|November 9, 2019
PubMed
Summary
This summary is machine-generated.

This study investigates nuclear structure in Cadmium-110 and Cadmium-112 isotopes. Findings reveal collective enhancements and rotational bands, suggesting multiple shape coexistence in these Cadmium isotopes.

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Area of Science:

  • Nuclear Physics
  • Atomic and Molecular Physics

Background:

  • Investigating nuclear structure provides insights into fundamental forces and matter.
  • Cadmium isotopes are key for understanding nuclear shell structure and collective phenomena.

Purpose of the Study:

  • To explore detailed spectroscopy of Cadmium-110 and Cadmium-112.
  • To identify and characterize non-yrast states and their decay properties.
  • To investigate evidence for shape coexistence and rotational bands in Cadmium isotopes.

Main Methods:

  • Detailed spectroscopy following beta decay of Indium-110, Indium-112, and Silver-112.
  • Measurement of level lifetimes using the Doppler-shift attenuation method.
  • Inelastic neutron scattering experiments.
  • Beyond-mean-field calculations using symmetry conserving configuration mixing with the Gogny D1S energy density functional.

Main Results:

  • Observation of weak decay branches from nonyrast states in Cadmium-110 and Cadmium-112.
  • Determination of transition rates and level lifetimes revealing collective enhancements.
  • Identification of a gamma band built on a shape-coexisting intruder configuration in Cadmium-110.
  • Suggestion of intruder gamma-band members and extension/identification of new bands in Cadmium-112.
  • Evidence supporting multiple shape coexistence in Cadmium isotopes.

Conclusions:

  • The study provides strong evidence for collective enhancements and rotational bands in Cadmium isotopes.
  • Findings suggest the presence of multiple shape coexistence, particularly involving intruder configurations.
  • Theoretical calculations support the experimental observations, enhancing our understanding of nuclear structure in this region.