Doubly Magic Nucleus {sub 108}{sup 270}Hs{sub 162}
- Technische Universitaet Muenchen, D-85748 Garching (Germany)
- Gesellschaft fuer Schwerionenforschung mbH, D-64291 Darmstadt (Germany)
- Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
- Paul Scherrer Institut, CH-5232 Villigen (Switzerland)
- Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- Universitaet Mainz, D-55128 Mainz (Germany)
Theoretical calculations predict {sup 270}Hs (Z=108, N=162) to be a doubly magic deformed nucleus, decaying mainly by {alpha}-particle emission. In this work, based on a rapid chemical isolation of Hs isotopes produced in the {sup 26}Mg+{sup 248}Cm reaction, we observed 15 genetically linked nuclear decay chains. Four chains were attributed to the new nuclide {sup 270}Hs, which decays by {alpha}-particle emission with Q{sub {alpha}}=9.02{+-}0.03 MeV to {sup 266}Sg which undergoes spontaneous fission with a half-life of 444{sub -148}{sup +444} ms. A production cross section of about 3 pb was measured for {sup 270}Hs. Thus, {sup 270}Hs is the first nucleus for which experimental nuclear decay properties have become available for comparison with theoretical predictions of the N=162 shell stability.
- OSTI ID:
- 20861474
- Journal Information:
- Physical Review Letters, Vol. 97, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.97.242501; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for long lived heaviest nuclei beyond the valley of stability
Nuclear Data Sheets for A=266,270,274,278,282,286,290,294,298☆