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: γ-ray spectroscopy of neutron-rich heavy nuclei in the actinide region. Method: Multinucleon-transfer reactions in Zn70+U238 and Xe136+U238 have been measured in two experiments performed at the INFN Legnaro, Italy. In the Zn70 experiment the high-resolution HPGe Clover Array (CLARA) coupled to the magnetic spectrometer PRISMA was employed. In the Xe136 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 U240 was measured up to the 20+ level and a tentative assignment was made up to the (24+) level. Results from γγ 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 U240 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 Kπ=0- band based on an octupole vibration. © 2015 American Physical Society. © 2015 American Physical Society.

Spectroscopy of the neutron-rich actinide nucleus U 240 following multinucleon-transfer reactions

Giaz A.;
2015-01-01

Abstract

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: γ-ray spectroscopy of neutron-rich heavy nuclei in the actinide region. Method: Multinucleon-transfer reactions in Zn70+U238 and Xe136+U238 have been measured in two experiments performed at the INFN Legnaro, Italy. In the Zn70 experiment the high-resolution HPGe Clover Array (CLARA) coupled to the magnetic spectrometer PRISMA was employed. In the Xe136 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 U240 was measured up to the 20+ level and a tentative assignment was made up to the (24+) level. Results from γγ 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 U240 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 Kπ=0- band based on an octupole vibration. © 2015 American Physical Society. © 2015 American Physical Society.
2015
http://www.scopus.com/inward/record.url?eid=2-s2.0-84946574879&partnerID=40&md5=25f354b3203443941710e94784dd9cff
Nuclear and High Energy Physics
Birkenbach, B.; Vogt, A.; Geibel, K.; Recchia, F.; Reiter, P.; Valiente-Dobón, J. J.; Bazzacco, D.; Bowry, M.; Bracco, A.; Bruyneel, B.; Corradi, L.; Crespi, F. C. L.; De Angelis, G.; Désesquelles, P.; Eberth, J.; Farnea, E.; Fioretto, E.; Gadea, A.; Gengelbach, A.; Giaz, A.; Görgen, A.; Gottardo, A.; Grebosz, J.; Hess, H.; John, P. R.; Jolie, J.; Judson, D. S.; Jungclaus, A.; Korten, W.; Lenzi, S.; Leoni, S.; Lunardi, S.; Menegazzo, R.; Mengoni, D.; Michelagnoli, C.; Mijatović, T.; Montagnoli, G.; Montanari, D.; Napoli, D.; Pellegri, L.; Pollarolo, G.; Pullia, A.; Quintana, B.; Radeck, F.; Rosso, D.; Şahin, E.; Salsac, M. D.; Scarlassara, F.; Söderström, P. -A.; Stefanini, A. M.; Steinbach, T.; Stezowski, O.; Szilner, S.; Szpak, B.; Theisen, C.; Ur, C.; Vandone, V.; Wiens, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2101559
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