Resolution of nuclear ground and isomeric states by a Penning trap mass spectrometer

Bollen, G.; Kluge, H. J.; König, Matthias; Otto, Th.; Savard, G.; Stolzenberg, H.; Moore, Robert B.; Rouleau, G.; Audi, G.

doi:10.1103/physrevc.46.r2140

Cited by 143 publications

(81 citation statements)

References 9 publications

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“…One of the primary conditions to minimize uncertainties of such a measurement is the availability of pure ion ensembles. In the presence of contaminations, the motion of the ions of interest is altered via the Coulomb interaction [3][4][5][6]. In general, the resulting deviations of the trapped-ion frequencies prevent precision experiments.…”

Section: Introductionmentioning

confidence: 99%

On-line separation of short-lived nuclei by a multi-reflection time-of-flight device

Wolf

Beck

Blaum

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

129

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a b s t r a c tA multi-reflection time-of-flight (MR-ToF) mass analyzer has been integrated into ISOLTRAP, the precision mass spectrometer for on-line mass determinations of short-lived nuclides at ISOLDE/CERN. The new instrument improves ISOLTRAP by providing a fast separation of isobaric contaminant species as well as subsequent ion selection using the fast Bradbury-Nielsen gate. Suppression ratios of up to 10 4 and mass-resolving powers of over 10 5 have been reached in off-line experiments. Preliminary data from on-line applications illustrate the benefit and performance of the device and its potential in the context of the ISOLTRAP setup.

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Section: Introductionmentioning

confidence: 99%

On-line separation of short-lived nuclei by a multi-reflection time-of-flight device

Wolf

Beck

Blaum

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

129

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“…These shifts are due to the Coulomb interaction of two ion species having di erent massover-charge ratios m=q stored simultaneously in the trap. It was found [20] that when the mass di erence between the two components is comparable to the line width of the cyclotron resonance, the RF-eld interacts with the center of gravity (1=N) P N i=1 (m=q) i and a single resonance is observed with the same line width as in the case of a one-component ion cloud. N denotes the number of stored ions.…”

Section: Measurementsmentioning

confidence: 80%

“…The analysis of the data and a series of test measurements showed that, besides the magnetic eld variations described above, the only frequency shifts with an amplitude larger than 10 7 are due to contaminations of the investigated nuclides by other nuclear species with di erent masses [20]. These shifts are due to the Coulomb interaction of two ion species having di erent massover-charge ratios m=q stored simultaneously in the trap.…”

Section: Measurementsmentioning

confidence: 99%

High-accuracy mass determination of unstable cesium and barium isotopes

et al. 1999

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Direct mass measurements of short-lived Cs and Ba isotopes have been performed with the tandem Penning trap mass spectrometer ISOLTRAP installed at the online isotope separator ISOLDE at CERN. Typically, a mass resolving power of 600 000 and an accuracy of m 13 keV have been obtained. The masses of 123;124;126 Ba and 122m Cs were measured for the rst time. A least-squares adjustment has been performed and the experimental masses are compared with theoretical ones, particularly in the frame of a macroscopic-microscopic model.

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“…The presence of contaminating ions in the measurement trap, produced either in the ISOLDE plasma ion source or created by charge exchange in the ISOLTRAP preparation traps, induces a shift in the cyclotron frequency of the ion of interest due to the coupling of the eigenmotions brought about by Coulomb interaction between ions with different massto-charge ratio [19]. This shift can be corrected for by applying a count rate analysis.…”

Section: Methodsmentioning

confidence: 99%