Discovery of 229Rn and the structure of the heaviest Rn and Ra isotopes from Penning-trap mass measurements

Discovery of 229Rn and the structure of the heaviest Rn and Ra isotopes from Penning-trap mass measurements

The masses of the neutron-rich radon isotopes {223-229}Rn have been determined for the first time, using the ISOLTRAP setup at CERN ISOLDE. In addition, this experiment marks the first discovery of a new nuclide, 229Rn, by Penning-trap mass measurement. The new, high-accuracy data allow a fine exami...

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Veröffentlicht in:Physical review letters 2009-03, Vol.102 (11), p.112501-112501
Hauptverfasser: Neidherr, D, Audi, G, Beck, D, Blaum, K, Böhm, Ch, Breitenfeldt, M, Cakirli, R B, Casten, R F, George, S, Herfurth, F, Herlert, A, Kellerbauer, A, Kowalska, M, Lunney, D, Minaya-Ramirez, E, Naimi, S, Noah, E, Penescu, L, Rosenbusch, M, Schwarz, S, Schweikhard, L, Stora, T
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Sprache:eng
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Zusammenfassung:The masses of the neutron-rich radon isotopes {223-229}Rn have been determined for the first time, using the ISOLTRAP setup at CERN ISOLDE. In addition, this experiment marks the first discovery of a new nuclide, 229Rn, by Penning-trap mass measurement. The new, high-accuracy data allow a fine examination of the mass surface, via the valence-nucleon interaction deltaV{pn}. The results reveal intriguing behavior, possibly reflecting either a N=134 subshell closure or an octupolar deformation in this region.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.102.112501