| Literature DB >> 20867370 |
Ch E Düllmann1, M Schädel, A Yakushev, A Türler, K Eberhardt, J V Kratz, D Ackermann, L-L Andersson, M Block, W Brüchle, J Dvorak, H G Essel, P A Ellison, J Even, J M Gates, A Gorshkov, R Graeger, K E Gregorich, W Hartmann, R-D Herzberg, F P Hessberger, D Hild, A Hübner, E Jäger, J Khuyagbaatar, B Kindler, J Krier, N Kurz, S Lahiri, D Liebe, B Lommel, M Maiti, H Nitsche, J P Omtvedt, E Parr, D Rudolph, J Runke, B Schausten, E Schimpf, A Semchenkov, J Steiner, P Thörle-Pospiech, J Uusitalo, M Wegrzecki, N Wiehl.
Abstract
The fusion-evaporation reaction 244Pu(48Ca,3-4n){288,289}114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of {288,289}114. At a compound nucleus excitation energy of E{*}=39.8-43.9 MeV, the 4n evaporation channel cross section was 9.8{-3.1}{+3.9} pb. At E^{*}=36.1-39.5 MeV, that of the 3n evaporation channel was 8.0{-4.5}{+7.4} pb. In one of the 3n evaporation channel decay chains, a previously unobserved α branch in 281Ds was observed (probability to be of random origin from background: 0.1%). This α decay populated the new nucleus 277Hs, which decayed by spontaneous fission after a lifetime of 4.5 ms.Year: 2010 PMID： 20867370 DOI： 10.1103/PhysRevLett.104.252701
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161