%0 Journal Article
%T Spectroscopy of the neutron-rich actinide nucleus U-240 following multinucleon-transfer reactions
%A Birkenbach, B. et al
%A Gadea, A.
%J Physical Review C
%D 2015
%V 92
%N 4
%I Amer Physical Soc
%@ 0556-2813
%G English
%F Birkenbach+Gadea2015
%O WOS:000363236900001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2421), last updated on Fri, 13 Nov 2015 15:00:27 +0000
%X Background: Nuclear structure information for the neutron-rich actinide nuclei is important since it is the benchmark for theoretical models that provide predictions for the heaviest nuclei. Purpose: gamma-ray spectroscopy of neutron-rich heavy nuclei in the actinide region. Method: Multinucleon-transfer reactions in Zn-70 + U-238 and Xe-136 + U-238 have been measured in two experiments performed at the INFN Legnaro, Italy. In the Zn-70 experiment the high-resolution HPGe Clover Array (CLARA) coupled to the magnetic spectrometer PRISMA was employed. In the Xe-136 experiment the high-resolution Advanced Gamma Tracking Array (AGATA) was used in combination with PRISMA and the Detector Array for Multinucleon Transfer Ejectiles (DANTE). Results: The ground-state band (g.s. band) of U-240 was measured up to the 20(+) level and a tentative assignment was made up to the (24(+)) level. Results from gamma gamma coincidence and from particle coincidence analyses are shown. Moments of inertia (MoI) show a clear upbend. Evidence for an extended first negative-parity band of U-240 is found. Conclusions: A detailed comparison with latest calculations shows best agreement with cranked relativistic Hartree-Bogoliubov (CRHB) calculations for the g.s. band properties. The negative-parity band shows the characteristics of a K-pi = 0 band based on an octupole vibration.
%R 10.1103/PhysRevC.92.044319
%U https://doi.org/10.1103/PhysRevC.92.044319
%P 044319-9pp