Direct mapping of nuclear shell effects in the heaviest elements

• Verfasst von: Minaya Ramirez, E. [VerfasserIn]
• Verfasst von: Blaum, Klaus [VerfasserIn]
• Verfasst von: Eibach, Martin Andreas [VerfasserIn]
• Titel: Direct mapping of nuclear shell effects in the heaviest elements
• Verf.angabe: E. Minaya Ramirez, D. Ackermann, K. Blaum, M. Block, C. Droese, Ch. E. Düllmann, M. Dworschak, M. Eibach, S. Eliseev, E. Haettner, F. Herfurth, F.P. Heßberger, S. Hofmann, J. Ketelaer, G. Marx, M. Mazzocco, D. Nesterenko, Yu. N. Novikov, W.R. Plaß, D. Rodríguez, C. Scheidenberger, L. Schweikhard, P.G. Thirolf, C. Weber
• E-Jahr: 2012
• Jahr: August 9, 2012
• Umfang: 4 S.
• Fussnoten: Gesehen am 21.11.2018
• Titel Quelle: Enthalten in: Science
• Ort Quelle: Washington, DC [u.a.] : American Association for the Advancement of Science, 1880
• Jahr Quelle: 2012
• Band/Heft Quelle: 337(2012), 6099, Seite 1207-1210
• ISSN Quelle: 1095-9203
• DOI: doi:10.1126/science.1225636
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1583921648

Abstract

Quantum-mechanical shell effects are expected to strongly enhance nuclear binding on an “island of stability” of superheavy elements. The predicted center at proton number Z = 114, 120, or 126 and neutron number N = 184 has been substantiated by the recent synthesis of new elements up to Z = 118. However, the location of the center and the extension of the island of stability remain vague. High-precision mass spectrometry allows the direct measurement of nuclear binding energies and thus the determination of the strength of shell effects. Here, we present such measurements for nobelium and lawrencium isotopes, which also pin down the deformed shell gap at N = 152. Highly precise mass measurements of nobelium and lawrencium isotopes provide insight into superheavy element stability.