BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Lifetime measurements in the N=126 region with the reversed plunge
 r configuration
DTSTART;VALUE=DATE-TIME:20240531T103000Z
DTEND;VALUE=DATE-TIME:20240531T105000Z
DTSTAMP;VALUE=DATE-TIME:20260411T182215Z
UID:indico-contribution-23827@indico.ific.uv.es
DESCRIPTION:Speakers: Julgen Pellumaj (INFN-Mi\, INFN-LNL)\nA novel techni
 que has been developed to measure lifetimes of heavy neutron-rich nuclei\,
  namely 'the reversed plunger'. In heavy neutron-rich nuclei\, information
  on the lifetimes of low-lying excited states is scarce since these nuclei
  are difficult to populate. Among different reaction mechanisms\, multi-nu
 cleon transfer reactions have shown to be the perfect tool to explore such
  regions. Therefore\, profiting from the kinematics of such reactions and 
 the plunger device in the reversed configuration\, lifetimes of excited nu
 clear states of the order of picoseconds can be measured.\nThis technique 
 was employed for the first time at Laboratori Nazionali di Legnaro to meas
 ure lifetimes of low-lying excited states of nuclei with a mass of around 
 190\, where shape transitions from prolate to oblate are expected to occur
  along different isotopic chains while approaching the N=126 shell closure
 .\nA beam of $^{136}$Xe with the energy of 1134~MeV passed through a degra
 der foil of $^{93}$Nb with a thickness of 3.2~mg/cm$^{2}$ and impinged int
 o a $^{198}$Pt target 1.4~mg/cm$^{2}$ thick. Beam-like fragments entered t
 he PRISMA spectrometer where they were identified in mass\, atomic number\
 , and velocity\, while the target-like fragments (the heavy nuclei of inte
 rest) traveled towards the degrader foil where they were stopped. Gamma ra
 ys were measured with the AGATA tracking array composed of 33 segmented HP
 Ge detectors. Among the nuclei populated in this experiment is $^{198}$Pt\
 , for which the lifetimes of the low-lying excited states are known\, and 
 can be used as a benchmark to validate the use of the proposed technique. 
 \nThis work reports the lifetimes of the 2$^{+}_{1}$\, 2$^{+}_{2}$ and the
  4$^{+}$ states of $^{198}$Pt measured with the reversed plunger configura
 tion\, employing the standard analysis procedures: the Decay Curve Method 
 and the Differential Decay Curve Method. The agreement of our results with
  the literature data demonstrates the capability of this technique to furt
 her investigate the nuclear structure of heavy neutron-rich nuclei.\n\nhtt
 ps://indico.ific.uv.es/event/7332/contributions/23827/
LOCATION:ADEIT - Valencia
URL:https://indico.ific.uv.es/event/7332/contributions/23827/
END:VEVENT
END:VCALENDAR