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Single-neutron states in (101)Sn.

D Seweryniak1, M P Carpenter, S Gros

  • 1Argonne National Laboratory, Argonne, Illinois 60439, USA.

Physical Review Letters
|August 7, 2007
PubMed
Summary
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Researchers measured single-particle energies near the (100)Sn nucleus for the first time. This provides crucial data for nuclear structure models and future spectroscopy studies near (100)Sn.

Area of Science:

  • Nuclear Physics
  • Nuclear Structure
  • Spectroscopy

Background:

  • The doubly magic (100)Sn nucleus is a key region for nuclear structure studies.
  • Limited data exists on single-particle energies outside this closed shell.

Purpose of the Study:

  • To obtain the first experimental data on relative single-particle energies outside the (100)Sn nucleus.
  • To test and refine current nuclear structure models.
  • To enable future spectroscopic investigations near (100)Sn.

Main Methods:

  • Correlation of a prompt gamma-ray transition with emitted protons following the beta decay of (101)Sn.
  • Analysis of the energy splitting between single-neutron orbitals.

Main Results:

Related Experiment Videos

  • First measurement of relative single-particle energies outside the (100)Sn nucleus.
  • Identification of a gamma-ray transition at 171.7(6) keV in (101)Sn, attributed to the g(7/2) to d(5/2) orbital transition.
  • Experimental determination of the nug(7/2)-nud(5/2) energy splitting.

Conclusions:

  • The obtained data provide a stringent test for nuclear structure models.
  • Calculated energy splitting values are consistent with mean-field potentials and shell model predictions.
  • The employed correlation technique is promising for future spectroscopy near (100)Sn.