Particle identification using the (DELTA)E-E technique and pulse shape discrimination with the silicon detectors of the FAZIA project

S. Carboni , S. Barlini , L. Bardelli , N. Le Neindre (1) , M. Bini , B. Borderie (2) , R. Bougault (1) , G. Casini , P. Edelbruck (2) , A. Olmi , G. Pasquali , G. Poggi , M.F. Rivet (2) , A.A. Stefanini , G. Baiocco , R. Berjillos , Eric Bonnet (3) , M. Bruno , A. Chbihi (3) , I. Cruceru , M. Degerlier , J.A. Dueñas , E. Galichet (2) , F. Gramegna , A. Kordyasz , T. Kozik , V.L. Kravchuk , O. Lopez (1) , T. Marchi , I. Martel , L. Morelli , M. Pârlog (1) , H. Petrascu , E. Rosato , V. Seredov (2) , E. Vient (1) , M. Vigilante , R. Alba , D. Santonocito , C. Maiolino

1 LPCC - Laboratoire de physique corpusculaire de Caen
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 GANIL - Grand Accélérateur National d'Ions Lourds

The response of silicon-silicon-CsI(Tl) and silicon-CsI(Tl) telescopes to fragments produced in nuclear interactions has been studied. The telescopes were developed within the FAZIA collaboration. The capabilities of two methods are compared: (a) the standard ΔE-E technique and (b) the digital Pulse Shape Analysis technique (for identification of nuclear fragments stopped in a single Si-layer). In a test setup, nuclear fragments covering a large range in nuclear charge, mass and energy were detected. They were produced in nuclear reactions induced by a 35A MeV beam of 129Xe impinging on various targets. It was found that the ΔE-E correlations allow the identification of all isotopes up to Z∼25. With the digital Pulse Shape Analysis it is possible to fully distinguish the charge of stopped nuclei up to the maximum available Z (slightly over that of the beam, Z=54).

Mots clés: Pulse shape discrimination; ΔE-E; Silicon detector; Charge signal; Current signal

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

S. Carboni, S. Barlini, L. Bardelli, N. Le Neindre, M. Bini, et al.. Particle identification using the (DELTA)E-E technique and pulse shape discrimination with the silicon detectors of the FAZIA project. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2012, 664, pp.251-263. ⟨10.1016/j.nima.2011.10.061⟩. ⟨in2p3-00656422⟩