High-lying states in 208Pb nucleus were populated via inelastic scattering of a 17O beam at bombarding energy of 20 MeV/u. Their subsequent gamma decay was measured with the detector system AGATA Demonstrator based on HPGe detectors, coupled to an array of large volume LaBr3:Ce scintillators. Preliminary results in comparison with (γ,γ′) data, for states in the 5–8 MeV energy interval, seem to indicate that in that region the states belong to two different groups one with a isoscalar character and the other with a isovector nature. This is similar to what was observed in other stable nuclei with (α,α′γ) experiments. The multipolarity of the observed gamma transitions is determined with remarkable sensitivity thanks to angular distribution measurements. Data aiming at studying the neutron decay of the Giant Quadrupole Resonance in the 208Pb by the high resolution measurement of the following gamma decay are also presented in their preliminary form.
Study of the γ decay of high-lying states in 208Pb via inelastic scattering of 17O ions / A. Bracco, F.C.L. Crespi. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 38(2012 Dec 10), pp. UNSP 03001.1-UNSP 03001.6. ((Intervento presentato al 6. convegno NSRT 2012 : International Conference on Nuclear Structure and Related Topics : tenutosi a Dubna (Russia) nel 2012.
|Titolo:||Study of the γ decay of high-lying states in 208Pb via inelastic scattering of 17O ions|
|Settore Scientifico Disciplinare:||Settore FIS/04 - Fisica Nucleare e Subnucleare|
Settore FIS/01 - Fisica Sperimentale
|Data di pubblicazione:||10-dic-2012|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1051/epjconf/20123803001|
|Appare nelle tipologie:||01 - Articolo su periodico|