Resolving multiple particles in a highly segmented silicon array

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2005-08, Vol.547 (2), p.464-479
• Main Authors: Paduszynski, T., Sprunger, P., de Souza, R.T., Hudan, S., Alexander, A., Davin, B., Fleener, G., Mcintosh, A., Metelko, C., Moore, R., Peters, N., Poehlman, J., Gauthier, J., Grenier, F., Roy, R., Thériault, D., Bell, E., Garey, J., Iglio, J., Keksis, A.L., Parketon, S., Richers, C., Shetty, D.V., Soisson, S.N., Soulioutis, G.A., Stein, B., Yennello, S.J.
• Format: Article
• Language: English
• Subjects: Charge-splitting in semiconductor detectors; Charged particle detection; Multi-particle detection; Projectile fragmentation; Segmented silicon detector
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2005.04.011

The design, construction, and performance of a new highly segmented charged particle detector array, FIRST, are described. This forward angle annular array ( 2 ∘ ⩽ θ lab ⩽ 28 ∘ ) has been developed to study peripheral and mid-central heavy-ion collisions at intermediate energies ( E / A ≈ 50 MeV ). FIRST consists of three individual telescopes that each utilize ion-passivated silicon detectors in either a Si(IP)–Si(IP)–CsI(Tl) stack or a Si(IP)–CsI(Tl) stack. This array provides elemental identification for 1 ⩽ Z ⩽ 50 with isotopic identification of lighter elements, Z ⩽ 13 , over a wide dynamic range in energy. The high segmentation of each silicon detector provides good angular resolution in a compact geometry and allows deconvolution of multiple particles incident on a single telescope. The performance of the array in a commissioning experiment Zn 64 + Zn 64 , Bi 209 at E / A = 45 MeV is shown.