Accurate masses of neutron-deficient nuclides close to Z=82
✍ Scribed by S. Schwarz; F. Ames; G. Audi; D. Beck; G. Bollen; C. De Coster; J. Dilling; O. Engels; R. Fossion; J.-E. Garcia Ramos; S. Henry; F. Herfurth; K. Heyde; A. Kellerbauer; H.-J. Kluge; A. Kohl; E. Lamour; D. Lunney; I. Martel; R.B. Moore; M. Oinonen; H. Raimbault-Hartmann; C. Scheidenberger; G. Sikler; J. Szerypo; C. Weber
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 150 KB
- Volume
- 693
- Category
- Article
- ISSN
- 0375-9474
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✦ Synopsis
Mass measurements with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE/CERN are extended to nonsurface ionizable species using newly developed ion-beam bunching devices. Masses of 179-197 Hg, 196,198 Pb, 197 Bi, 198 Po and 203 At were determined with an accuracy of 1 × 10 -7 corresponding to δm ≈ 20 keV. Applying a resolving power of up to 3.7 × 10 6 ground and isomeric states of 185,187,191,193,197 Hg were separated. First experimental values for the isomeric excitation energy of 187,191 Hg are obtained. A least-squares adjustment has been performed and theoretical approaches are discussed to model the observed fine structure in the binding energy.