Showing papers by "Lutz Schweikhard published in 1987"
TL;DR: In this paper, the cyclotron frequencies for 77,78,85,86,88Rb and 88Sr ions were determined with a resolving power of 3×105 and an accuracy of better than 10−6, which corresponds to 100 keV for massA=100.
Abstract: Absolute mass measurements of short-lived isotopes have been performed at the on-line mass separator ISOLDE at CERN by determining the cyclotron frequencies of ions confined in a Penning trap. The cyclotron frequencies for77,78,85,86,88Rb and88Sr ions could be determined with a resolving power of 3×105 and an accuracy of better than 10−6, which corresponds to 100 keV for massA=100. The shortest-lived isotope under investigation was77Rb with a half-life of 3.7 min. The resonances obtained for the isobars88Rb and88Sr were clearly resolved.
42 citations
01 Jan 1987
TL;DR: In this article, a Penning trap was used for spectroscopy of stored cluster ions, achieving a resolving power of 500,000 in a mass measurement of 39K and an accuracy of 2 × 10−7 for the85Rb/39K mass ratio.
Abstract: We propose to use a Penning trap for spectroscopy of stored cluster ions. A similar device has been built for the purpose of mass measurements of short-lived nuclei produced at the on-line isotope separator ISOLDE/CERN. A resolving power of 500,000 in a mass measurement of39K and an accuracy of 2 × 10−7 for the85Rb/39K mass ratio were obtained. An efficiency for in-flight capture as high as 70% was achieved. The method provides very high sensitivity since typically only 10 to 100 ions are stored in the trap. We intend to perform laser spectroscopy on trapped Na clusters as a first application of the trap technique.
1 citations