REX-ISOLDE

HIE-ISOLDE – MINIBALL

One can see the MINIBALL target chamber here, hosting a wheel with 6 positions for various targets and a CD-shaped double-sided silicon strip detector, short DSSD. This detector is used for particle detection and identification.

At the ISOLDE facility at CERN, radioactive ion beams of isotopes all across the chart of nuclides are produced by injecting 1.4 GeV protons on a thick primary target. The produced ions are extracted by an ion source and mass separated using the ISOL method. The selected ions are post-accelerated by REX- and super conducting HIE-accelerators up to an energy of 10 MeV/A and delivered to the experminental station, where they impinge on a thin secondary target. Around this target chamber (see picture to the right) the high-purity germanium (HPGe) detector array MINIBALL (see picture below) and a double-sided silicon strip detector (DSSD) are placed for high energy resolution gamma-ray spectroscopy and particle detection, respectively. A so-called plunger device for the measurement of excited-state lifetimes in the pico-second regime and magnetic moments can replace the target chamber. These experimental setups are used by our group for projectile Coulomb excitation experiments and lifetime measurements using Doppler-shift to study the nuclear structure of rare nuclei.

Upcoming experiments:

  • Configurational Isospin Polarization in 136Te – projectile Coulomb excitation and DSAM (IS596).

Recent experiments:

  • Shape co-existence in 96Kr – Coulomb-nuclear excitation (IS644, 2018).

Previous experiments:

  • Nuclear moments studies of 28Mg – g-factor measurement (TDRIV) (IS628, 2017).
  • Collective mixed-symmetry quadrupole states of N = 80 isotones (140Nd, 142Sm) – projectile Coulomb excitation (IS546, 2017).
  • Investigation of the 100Sn region – transfer reaction and Coulomb excitation (IS562, 2016-2017).
  • Collective first quadrupole states of N = 80 isotones (140Nd, 142Sm) – projectile Coulomb excitation (IS496, 2012).
Eigentum von L.P. Gaffney
Eigentum von L.P. Gaffney