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New nuclides: Neptunium-243 and neptunium-244 |
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| Authors: | K J Moody W Brüchle M Brügger H Gäggeler B Haefner M Schädel K Sümmerer H Tetzlaff G Herrmann N Kaffrell J V Kratz J Rogowski N Trautmann M Skålberg G Skarnemark J Alstad M M Fowler |
| Institution: | 1. Gesellschaft für Schwerionenforschung, Darmstadt, Federal Republic of Germany 4. Institut für Kernchemie, Universit?t Mainz, Federal Republic of Germany 5. Department of Nuclear Chemistry, Chalmers University of Technology, G?teborg, Sweden 6. Department of Chemistry, University of Oslo, Norway 7. Los Alamos National Laboratory, Los Alamos, USA |
| Abstract: | We have observedγ-rays following the β?-decay of243Np and244Np after chemical isolation of neptunium isotopes from the products of the reaction of 835 MeV136Xe with244Pu. The ground-state of 1.85-min243Np hasJ=5/2. The decay of 2.29-min244Np (probableJ π=7?) populates high-spin members of the ground state rotational band in244Pu. |
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