2019
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Type Seminar
Date June 14, 2019 - 11:00
Time 11:00
Location Room 105 | GANIL, Caen | France
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Binding energy studies at the extreme of the nuclear landscape with ISOLTRAP

Maxime Mougeot (Max-Planck Institut für Kernphysik, Heidelberg, Germany)

The modern approach unravelling the complex nuclear many body problem has been to track the evolution of nuclear properties in systems ever closer to the proton or neutron drip-line. Binding energies are among the first observables reaching in yet uncharted regions of the nuclear chart and their trends are sensitive to a wide range of nuclear structure phenomena. As such, they provide invaluable inputs to virtually all nuclear models.

In this contribution, the modern measurement tools routinely used for high-precision atomic mass determination with the ISOLTRAP mass spectrometer [1-2], located at ISOLDE/CERN, will be introduced. To this end, examples drawn from a recent mass measurement campaign dedicated to the study of the N=28 shell closure in the argon isotopic chain will be presented.

Over the last years the ISOLTRAP mass spectrometer was intensively used to probe the region around N=82 below the tin isotopic chain [3]. Recent results from a mass measurement campaign dedicated to the Cd isotopes beyond N=82 will be presented. Additionally, several odd-even Cd isotopes below N=82 were shown to exhibit longlived isomeric states [4]. The successfully commissioned phase-imaging ion-cyclotronresonance technique [5] now completes ISOLTRAP’s arsenal of high-resolving power and high-sensitivity mass spectrometry techniques enabling for isomeric separation within a few hundred milliseconds. Thus, recent results from the application of this technique to 127Cd and 129Cd will be highlighted.

On the opposite side of the nuclear chart, a mass measurement campaign was dedicated to the study of neutron-deficient In isotopes in the vicinity of the doubly magic 100Sn. This campaign performed at the extreme of the nuclear landscape was successful and the mass measurement of 99-101In allowed us the investigation of the Z=N=50 shell closure in close proximity with the proton drip-line. This contribution will also show results from this campaign.

REFERENCES

[1] Mukherjee et al., Eur. Phys. J. A 35, 1-29 (2008).
[2] R. Wolf, F. Wienholtz et al., Int. J. Mass. Spectrom. 349-350, 123-133 (2013).
[3] D. Atanasov, et al., Phys. Rev. Lett. 115, 232501 (2015).
[4] D.T. Yordanov, et al., Phys. Rev. Lett. 110, 192501 (2013).
[5] S. Eliseev et al., Phys. Rev. Lett. 110, 082501 (2013).

 

Practical information:

11h00 GANIL seminar room (105)
Coffee will be served 15mn before