Decay study of 246Fm at SHIP

M. Venhart; F.P. Heßberger; D. Ackermann; S. Antalic; C. Gray-Jones; P.T. Greenlees; S. Heinz; R.-D. Herzberg; S. Hofmann; S. Ketelhut; B. Kindler; I. Kojouharov; M. Leino; B. Lommel; R. Mann; P. Papadakis; D. Rostron; D. Rudolph; Š. Šáro; B. Sulignano

doi:10.1140/epja/i2011-11020-9

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A 47, 20 (2011)
https://doi.org/10.1140/epja/i2011-11020-9

Decay study of ²⁴⁶Fm at SHIP

M. Venhart¹^,2, F.P. Heßberger³, D. Ackermann³, S. Antalic¹, C. Gray-Jones⁴, P.T. Greenlees⁵, S. Heinz³, R.-D. Herzberg⁴, S. Hofmann³^,6, S. Ketelhut⁵, B. Kindler³, I. Kojouharov³, M. Leino⁵, B. Lommel³, R. Mann³, P. Papadakis⁴, D. Rostron⁶, D. Rudolph⁷, Š. Šáro¹ and B. Sulignano⁸

¹ Department of Nuclear Physics and Biophysics, Comenius University, 84 248, Bratislava, Slovakia
² Institute of Physics, Slovak Academy of Sciences, 84 511, Bratislava, Slovakia
³ GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
⁴ Department of Physics, University of Liverpool, L69 7ZE, Liverpool, UK
⁵ Department of Physics, University of Jyväskylä, 40014, Jyväskylä, Finland
⁶ Institut für Kernphysik, Goethe-Universität, 60054, Frankfurt am Main, Germany
⁷ Department of Physics, Lund University, 221 00, Lund, Sweden
⁸ DAPNIA/SPhN, CEA Saclay, 91191, Gif/Yvette Cedex, France

martin.venhart@cern.ch

Received: 22 July 2010
Accepted: 7 January 2011
Published online: 4 February 2011

Abstract

The decay chain of ²⁴⁶Fm has been investigated employing the SHIP separator at GSI Darmstadt. The ²⁴⁶Fm nuclei were produced via the ⁴⁰Ar(²⁰⁸Pb, 2n)²⁴⁶Fm fusion-evaporation reaction. Improved values of the half-life, T _1/2 = 1.54(4) s, and of the spontaneous fission branching ratio, b _SF = 0.068(6) , of ²⁴⁶Fm were obtained. The /electron capture branching ratio, b _EC = 0.39(3) , of ²⁴²Cf was deduced. Possible structures of high-K states in ²⁴⁶Fm are discussed within the framework of a model calculation based on the Woods-Saxon potential.