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The Nuclear Physics Group Structure of Matter (FQM318) of the University of Huelva (Spain), has been carrying out an extensive program on low-energy reactions and nuclear structure of exotic nuclei since 2000.
The activity has covered a wide range of topics including exotic particle emission, haloes and clustering, nuclear astrophysics and shell-evolution.
When working with radioactive nuclei, the usually low beam intensities and variety of reaction fragments make necessary the use of particle detectors with large solid angle and angular coverage.
The group has recently built the neutron detector SAND (Small Array of Neutron Detectors), an array of 32 independent modules of plastic scintillator (10x10x10 cm3/unit).
The array measures the energy and angular distributions of neutrons produced in nuclear reactions induced by neutron-rich nuclei using the Time-Of-Flight technique.
The system is presently commissioned at CERN (Geneva, Switzerland) as part of the instruments of the HIE-ISOLDE beam line XT03 [1].
SAND is foreseen to be used in coincidence with particle detectors placed at the SED scattering chamber, which deliver the START or STOP signals. Preliminary tests have been carried out using the silicon array GLORIA [2] built also by the group.
References
[1] A. Herlert and Y. Kadi , “The HIE-ISOLDE Project” Journal of Physics: Conference Series 312 (2011) 052010.
[2] G. Marquínez-Durán, et al.Nucl. Inst. Meth. A755 (2014) 69.
Setting up the SAND detector for measuring the angular distribution of neutrons in the scattering of 11Li with a triton target at HIE-ISOLDE.
The data acquisition system of SAND uses 32 constant fraction discriminators from MESYTEC mod. MCFD and CAEN TDC V775.
I. Martel is Professor at the School of Engineering of the University of Huelva (Spain), and Head of the Nuclear Physics Group Structure of Matter.
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