Application of pulse shape discrimination in Si

detector for fission fragment angular distribution

measurements

B K NAYAK¹, E T MIRGULE¹ and R K CHOUDHURY^1,2

¹Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India

²Institute of Physics, Sachivalaya Marg, Bhubaneswar 751 005, India

E-mail: bknayak@apsara.barc.ernet.in

Abstract. Pulse shape discrimination (PSD) with totally depleted

transmission type Si surface barrier detector in reverse mount

has been investigated to identify fission fragments in the

presence of elastic background in heavy ion-induced fission

reactions by both numerical simulation and experimental studies.

The PSD method is compared with the other conventional methods

adopted to identify fission fragments with solid-state detectors

such as $\Delta E$--$E$ telescope and single thin $\Delta E$

detector and the data for the $^{10}${B} + $^{232}${Th} fission reaction are

presented. Results demonstrate the usefulness of a single

transmission-type surface barrier detector for the identification of

fission fragments and projectiles like heavy ions.

Keywords. Pulse shape discrimination; solid-state surface barrier detector;

heavy ion-induced fission reaction studies.

PACS Nos 29.40.Wk; 25.70.Jj, 25.85.Ge