The TITAN mass measurement facility at TRIUMF-ISAC

P. Delheij, L. Blomeley, M. Froese, G. Gwinner, V. Ryjkov, M. Smith, J. Dilling

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The TITAN facility at TRIUMF-ISAC will use four ion traps with the primary goal of determining nuclear masses with high precision, particularly for short lived isotopes with lifetimes down to approximately 10 ms. The design value for the accuracy of the mass measurement is 1 ×10∈-∈8. The four main components in the facility are an RF cooler/buncher (RFCT) receiving the incoming ion beam, an electron beam ion trap (EBIT) to breed the ions to higher charge states, a cooler Penning trap (CPET) to cool the highly charged ions, and finally the measurement Penning trap (MPET) for the precision mass determination. Additional goals for this system are laser spectroscopy on ions extracted from the RFCT and beta spectroscopy in the EBIT (in Penning trap mode) on ions that are purified using selective buffer gas cooling in the CPET. The physics motivation for the mass measurements are manifold, from unitarity tests of the CKM matrix to nuclear structure very far from the valley of stability, nuclear astrophysics and the study of halo-nuclei. As a first measurement the mass of 11Li will be determined. With a lifetime of 8.7 ms and a demonstrated production rate of 4×104 ions/sec at ISAC the goal for this measurement at TITAN is a relative uncertainty of 5×10∈-∈8. This would check previous conflicting measurements and provide information for nuclear theory and models.

Original languageEnglish
Pages (from-to)123-131
Number of pages9
JournalHyperfine Interactions
Volume173
Issue number1-3
DOIs
StatePublished - Nov 2006
Externally publishedYes

Funding

Acknowledgements The contributions to the TITAN project from H.-J. Kluge (GSI) and G. Werth (Univ. of Mainz) deserve special acknowledgement. NSERC and CFI of Canada awarded grants to support the TITAN project.

Keywords

  • Halo nucleus
  • Nuclear mass
  • Shell closure
  • Standard model

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