Mass ratio of two ions in a Penning trap by alternating between the trap center and a large cyclotron orbit

Matthew Redshaw, Joseph McDaniel, Wei Shi, Edmund G. Myers

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We have implemented a technique for precision mass comparison of two ions trapped simultaneously in a Penning trap in which each ion is alternately positioned at the center of the trap - where the cyclotron frequency is measured - and in a large cyclotron "parking" orbit. Systematic shifts in the cyclotron frequency ratio have been studied by comparing 13C2H2+/14N2+ and 14N2+/28Si+. Using the method to compare 28SiH3+/31P+ we have obtained a new atomic mass for 31P, M[31P] = 30.973 761 999 7 (61) u.

Original languageEnglish
Pages (from-to)125-130
Number of pages6
JournalInternational Journal of Mass Spectrometry
Volume251
Issue number2-3 SPEC. ISS.
DOIs
StatePublished - Apr 1 2006

Keywords

  • Atomic mass
  • Penning trap
  • Precision measurement

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