Digital pulse-shape analysis with a TRACE early silicon prototype

Abstract

A highly segmented silicon-pad detector prototype has been tested to explore the performance of the digital pulse shape analysis in the discrimination of the particles reaching the silicon detector. For the first time a 200 μm thin silicon detector, grown using an ordinary floating zone technique, has been shown to exhibit a level discrimination thanks to the fine segmentation. Light-charged particles down to few MeV have been separated, including their punch-through. A coaxial HPGe detector in time coincidence has further confirmed the quality of the particle discrimination

1−and2+discrete states inZr90populated via theCrespi1, Bracco2, Nicolini3 et al. 2015Phys. Rev. CSelf Cite361120View full textAdd to dashboardCite

“…These telescopes are prototypes built for the TRACE project [22]. Each used Si detector had an horizontal size of 20 mm and a vertical size of 50 mm and included 60 pixels each with an area of 4 × 4 mm.…”

Pygmy dipole resonance inCe140via inelastic scattering ofO17

“…The 17 O ions were chosen to avoid the background from γ rays due to projectile excitation. The scattered 17 O nuclei were detected by two ∆E-E silicon telescopes of the TRACE array [20], mounted inside a scattering chamber at an angle of 9…”

“…Its major part is exhausted by the Isovector Giant Dipole Resonance (IVGDR) (for the overview on giant resonances see Refs. [1,2]), which is a very well studied collective phenomenon described as an out-of-phase oscillation of protons versus neutrons, located in the energy interval well above the neutron separation energy (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). Below the IVGDR and around the particle separation energy, a small fraction of fragmented dipole states is also observed, exhausting a few percent of an energy-weighted sum rule (EWSR) depending on the nucleus.…”

Conceptual design of the TRACE detector readout using a compact, dead time-less analog memory ASIC

“…The TRacking Array for light Charged particle Ejectiles (TRACE) [1,2] is a new telescope detector system for the discrimination of particles and light ions in fusion evaporation and direct nuclear reactions, designed to work 5 in combination with a large gamma tracking array like AGATA [3]. Each detector cell is a ∆E-E telescope consisting of a double silicon layer with respective thicknesses of 200 µm and 1 mm, forming a 12 × 5 array of pads with a 4 × 4 mm 2 pitch, and a resistivity of 20 kΩ/cm.…”

“…Identifi-10 cation of different ions and particles relies on both ∆E-E discrimination and pulse shape analysis (PSA) [4] based on the sampling of all detector pulses generated at the silicon pads. The first experimental tests have already taken place with temporary readout electronics using commer- 15 cial DAQ modules and only a limited number of detector channels [5]. It has been established that acquisition windows of 1 µs at 200 MHz sampling frequency or higher are…”