TONERRE detector built by IFIN-HH in collaboration with LPC-Caen and GANIL was employed in numerous experiments for neutron energy and multiplicity measurements
in coincidence with gamma spectroscopy. It allowed structure studies of very neutron rich nuclei by means of beta-delayed neutron emission
decay.
2-proton decay was discovered at GANIL by a large international collaboration led by CENBG Bordeaux with IFIN-HH membership.
IFIN-HH contributed to the development of the Time Projection Chamber (TPC) that was able to reveal the 2p decay mode of those
highly neutron-deficient nuclei.
Chateau de Cristal BaF2 array employed in collaboration:
Compact high-efficiency setup for combined gamma-conversion electrons (and/or e-e+ from IPF) spectroscopy for studies of isomeric states
populated in fragmentation or beta-decay.
02+ states revealed and characterized in 34Si and 44S as indications of shell evolution and
shape coexistence towards the Island of Inversion at N=20 and inside the one at N=28 respectively.
Astrophysical studies using SPIRAL1 radioactive beams to characterize unbound excited
states in resonant inelastic scattering experiments.
The image shows the results of such an experiment targeting the 15F unbound nucleus and its excited states.
IFIN-HH designed and built the Beam Loss Monitor system - a security equipment that is being installed at the GANIL SPIRAL2 facility as an in-kind contribution of Romania to the SPIRAL2 project.
The IFIN-HH team contributes actively to the ISOLDE facility, namely the construction of the ISOLDE Decay station (IDS) with a large
Romanian contribution in equipment, manpower and expertize. Following the successful commissioning in August 2014 several experiments
were performed and already from the online analysis it becomes clear that these experiments are expected to lead to valuable physics
results.
The detection system of IDS is very versatile, with a core of four germanium clusters (HPGe) used for gamma detection. Four different setups can be provided depending on the case under study and physics aim:
The different experimental configurations are shown on the picture below.
Except the "charged particles spectroscopy" for which the beam is implanted within a thin carbon foil, all the configurations are compatible with a tape system. The beam of interest is implanted within a tape. In order to improve the signal/noise ratio and measure the short lived components the tape can be moved away from the detection setup.
High Efficiency 𝛽-𝛾 spectroscopy
The experimental setup consists of 5 HPGe clover detectors and a newly designed plastic scintillator as a beta-trigger.
The beta efficiency was improved by using a thick rectangular-like beta detector covering 95% of solid angle around the implantation tape.
The light produced by scintillation is collected simultaneously by 2 photomultipliers, aiming at lowering the thresholds below the PMT's
noise level thanks to the application of coincidence between the two light outputs.
The standard IDS NUTAQ based data acquisition system is employed to acquire all the signals.
Fast Timing technique configuration
The fast-timing technique is based on the use of fast scintillator detectors which allow to determine time references studying the radiative decay.
This allows the determination of short lifetimes of nuclear excited states. The available range for measurement is 10 ps - 100 ns.
The principle of the fast-timing technique is illustrated on the picture on the left.
LaBr3(Ce), fast plastic scintillators and HPGe clover detectors are used for life-time measurements using the βɣɣ(t) fast-timing technique.
The IDS fast-timing configuration accommodates a fast plastic scintillator to detect the β, 4 HPGe (High Pure Germanium) detectors
and 2 LaBr3(Ce) scintillators to detect ɣ-rays.
The Pierre Auger Observatory is the largest hybrid set-up dedicated to the detection of cosmic rays.
It is situated in the Mendoza province in the Argentinian pampa and it is operated by a joint consortium of 17
countries and 400 scientists.
The Pierre Auger Observatory is a "hybrid detector," employing several independent methods to detect and study
high-energy cosmic rays. One technique detects high energy particles through their interaction with water placed
in surface detector tanks. The other technique tracks the development of air showers by observing ultraviolet light
emitted high in the Earth's atmosphere. The hybrid nature of the Pierre Auger Observatory provides for two independent
ways to see cosmic rays. These two ways are an array of surface detector stations, and a collection of air fluorescence
telescopes. The Romanian group (IFIN-HH together with ISS and UPB) contributes to data analysis, components delevopment
and data quality monitoring in the frame of the AERA array, the array of radio antennas within the Observatory as well
as maintenance shift for the SD, FD and AERA sub-systems.