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Energy systematics of low-lying Nilsson levels in odd-mass einsteinium isotopes |
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| Authors: | F. P. Heßberger S. Antalic B. Streicher S. Hofmann D. Ackermann B. Kindler I. Kojouharov P. Kuusiniemi M. Leino B. Lommel R. Mann K. Nishio S. Saro B. Sulignano |
| Affiliation: | 1. Gesellschaft für Schwerionenforschung mbH, D-64220, Darmstadt, Germany 2. Department of Nuclear Physics, Comenius University, SK-84215, Bratislava, Slovakia 3. Institut für Kernphysik, Johann Wolfgang Goethe-Universit?t, D-60054, Frankfurt am Main, Germany 4. Institut für Physik, Johannes Gutenberg-Universit?t, D-55099, Mainz, Germany 5. Department of Physics, University of Jyv?skyl?, FIN-40361, Jyv?skyl?, Finland 6. Japan Atomic Energy Research Institute (JAERI), 319-1195, Tokai, Ibaraki, Japan |
| Abstract: | The decay of odd-mass mendelevium isotopes ( A = 247-255) has been studied by means of α-γ spectroscopy. Strong evidence for a small α branch in the decay of 253Md was found. γ lines in coincidence with α-decays of 247, 249, 251, 253Md have been observed for the first time. Levels in the einsteinium daughter nuclei were assigned on the basis of α-γ coincidence measurements. An energy systematics of the 7/2-[514] Nilsson level could be established, showing a correlation with the deformation parameter β2 of the corresponding nuclei. The results are compared with theoretical predictions |
| Keywords: | 23.60.+e α decay 27.90.+b 220 ⩽ A |
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