Speaker
giovanna benzoni
(INFN sezione di Milano)
Description
The neutron-rich lead region is of exceptional interest to trace the evolution of single-particle levels and the residual proton-neutron interaction beyond the doubly magic 208Pb. While 208Pb is well understood in terms of the shell model, experimental data on the heavier isotopes are very scarce[1,2].
Another crucial aspect that calls for further experimental information is the evaluation of beta-decay half lives for neutron-rich nuclei with A>215. These half lives are particularly needed for r-process calculations as an essential test to validate the nuclear and beta-decay models away from stability[3].
In this talk results from a recent RISING experiment aiming at studying neutron-rich lead isotopes with A>210 will be reported.
The experiment employed the active stopper configuration of the RISING array in order to study both isomeric gamma decay of long-lived states and the beta decay of heavy lead and bismuth isotopes.
The nuclei of interest were populated by relativistic fragmentation of 238U at 1GeV/u on a Be target. The ions of interest where transported in the GSI FRS separator [4] and implanted in an active catcher consisting of 9 Silicon DSSSD. The gamma decay after implantation was measured by the 15 Cluster HPGe detectors of the RISING array [5,6].
New isomers have been identified in the populated Pb, Bi and Tl isotopes, and their lifetime and isomeric ratios are being evaluated. Comparison with shell model calculations will be presented.
[1]M. Pfutzner et al., Phys. Lett. B 444 (1998) 32-37.
[2]Zs. Podolyak, Acta Physica Polonica B36 (2005) 1269.
[3]I.N. Borzov. Phys. Rev. C67 (2004) 025802.
[4]H. Geissel et al., Nucl. Instr. Meth. B70 (1992) 286.
[5]S. Pietri et al., Nucl. Instr. Meth. B 261 (2007)1079.
[6]R. Kumar et al., Nucl. Instr. Meth. A 598 (2009) 754.
| Is this an invited talk? (please answer yes or no) | no |
|---|---|
| Would you prefer your contribution to be an oral presentation? (please answer yes or no) | yes |
| Would you prefer your contribution to be a poster presentation? (please answer yes or no) | no |
Primary author
giovanna benzoni
(INFN sezione di Milano)
Co-authors
Ajay Deo
(Universiy of Surrey, Guildford, UK)
Alejandro Algora
(IFIC, Valencia, E)
Alison Bruce
(Univ. Of Brighton, Brighton, UK)
Ana Denis-Bacelar
(Univ. Of Brighton, Brighton, UK)
Andrea Gottardo
(INFN-LNL, Legnaro (Pd), I)
Andres Gadea
(IFIC, Valencia, E)
Angela Bracco
(Universita' degli Studi e INFN sezione di Milano, Milano, I)
Anjali Sharma
(GSI, Darmstadt, D)
Anna Corsi
(Universita degli Studi e INFN sezione di Milano, Milano, I)
Anrej Prochazka
(GSI, Darmstadt, D)
Benedicte Million
(Universita' degli Studi e INFN sezione di Milano, Milano, I)
Cesar Domingo-Pardo
(GSI, Darmstadt, D)
Chiara Nociforo
(GSI, Darmstadt, D)
Daniel Napoli
(INFN-LNL, Legnaro (Pd), I)
Daniele Mengoni
(Universit\`a di Padova e INFN sezione di Padova, Padova, I;University of the West of Scotland, Paisley, UK)
Davinder Siwal
(Univ. of Delhi, Delhi, IND)
Dirk Rudolph
(Lund University, Lund, S)
Eda Sahin
(INFN-LNL, Legnaro (Pd), I)
Elionora Gregor
(GSI, Darmstadt, D)
Enrique Casarejos
(University of Santiago de Compostela, Santiago de Compostela, E)
Fabio Crespi
(Universita' degli Studi e INFN sezione di Milano, Milano, I)
Fabio Farinon
(GSI, Darmstadt, D)
Farheen Navqi
(IKP Koeln, Koeln, D)
Francesco Recchia
(Universit\`a di Padova e INFN sezione di Padova, Padova, I)
Franco Camera
(Universita' degli Studi e INFN sezione di Milano, Milano, I)
Gregory Farrelly
(Universiy of Surrey, Guildford, UK)
Hans Geissel
(GSI, Darmstadt, D)
Hans-Jurgen Wollersheim
(GSI, Darmstadt, D)
Helmut Weick
(GSI, Darmstadt, D)
Henning Schaffner
(GSI, Darmstadt, D)
Ivan Kojouharov
(GSI, Darmstadt, D)
Jan Szarka
(Comenius University, Bratislava, S)
Jerzy Grebosz
(GSI, Darmstadt, D)
Jose Benlliure
(University of Santiago de Compostela, Santiago de Compostela, E)
Jose Javier Valiente-Dobon
(INFN-LNL, Legnaro (Pd), I)
Juan Alcantara Nunez
(University of Santiago de Compostela, Santiago de Compostela, E)
Jurgen Gerl
(GSI, Darmstadt, D)
Katrin Eppinger
(TU Munich, Munich, D)
Konrad Steger
(TU Munich, Munich, D)
Magdalena Gorska
(GSI, Darmstadt, D)
Marek Pfutzner
(University of Warsaw, Warsaw, Pl)
Maria Doncel
(Univ. Of Salamanca, Salamanca, E)
Matthew Reed
(Universiy of Surrey, Guildford, UK)
Mike Bowry
(Universiy of Surrey, Guildford, UK)
Mike Bunce
(Universiy of Surrey, Guildford, UK)
Namita Goel
(GSI, Darmstadt, D)
Nasser Alkhomashi
(Universiy of Surrey, Guildford, UK)
Nawras Al-Dahan
(Universiy of Surrey, Guildford, UK)
Nik Kurz
(GSI, Darmstadt, D)
Oliver Wieland
(Universita' degli Studi e INFN sezione di Milano, Milano, I)
Patrick Regan
(Universiy of Surrey, Guildford, UK)
Paula Allegro
(Univ. Of Sao Paulo, Sao Paulo, Br)
Philip Walker
(Universiy of Surrey, Guildford, UK)
Plamen Boutachkov
(GSI, Darmstadt, D)
Robert Hoiscen
(Lund University, Lund, S)
Roberto Menegazzo
(Universita' di Padova e INFN sezione di Padova, Padova, I)
Roberto Nicolini
(Universita' degli Studi e INFN sezione di Milano, Milano, I)
Roberto Ribas
(Univ. Of Sao Paulo, Sao Paulo, Br)
Samit Mandal
(Univ. of Delhi, Delhi, IND)
Santo Lunardi
(Universita' di Padova e INFN sezione di Padova, Padova, I)
Silvia Leoni
(Universita' degli Studi e INFN sezione di Milano, Milano, I)
Stephane Pietri
(GSI, Darmstadt, D)
Stephanie Klupp
(TU Munich, Munich, D)
Thomas Pissulla
(IKP Koeln, Koeln, D)
Thomas Swan
(Universiy of Surrey, Guildford, UK)
Wawrzyniec Prokopowicz
(GSI, Darmstadt, D)
Yassid Ayyad
(University of Santiago de Compostela, Santiago de Compostela, E)
Zsolt Dombradi
(ATOMKI, Debrecen, H)
Zsolt Podolyak
(Universiy of Surrey, Guildford, UK)
liliana cortes
(GSI, Darmstadt, D)
