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New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopes
- Source :
- Phys. Rev. C 97, 064306 (2018)
- Publication Year :
- 2018
-
Abstract
- The masses of the exotic isotopes $^{210-214}$Ac and $^{210-214}$Ra have been measured with a multi-reflection time-of-flight mass spectrograph. These isotopes were obtained in flight as fusion-evaporation products behind the gas-filled recoil ion separator GARIS-II at RIKEN. The new direct mass measurements serve as an independent and direct benchmark for existing $\alpha$-$\gamma$ spectroscopy data in this mass region. Further, new mass anchor points are set for U and Np nuclei close to the $N=126$ shell closure for a future benchmark of the $Z=92$ sub-shell for neutron-deficient heavy isotopes. Our mass results are in general in good agreement with the previously indirectly-determined mass values. Together with the measurement data, reasons for possible mass ambiguities from decay-data links between ground states are discussed.
- Subjects :
- Nuclear Experiment
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. C 97, 064306 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1801.02823
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevC.97.064306