Armenian Journal of Physics

LOW-PRESSURE MWPC SYSTEM FOR THE DETECTION OF ALPHA-PARTICLES AND FISSION FRAGMENTS

Margaryan, A. and Adler, J.-O. and Brudvik, J. and Grigoryan, N. and Fissum, K. and Hansen, K. and Isaksson, L. and Knyazyan, S. and Lundin, M. and Marikyan, G. and Nilsson, B. and Parlakyan, L. and Schroder, B. and Vardanyan, H. and Zhamkochyan, S. (2010) LOW-PRESSURE MWPC SYSTEM FOR THE DETECTION OF ALPHA-PARTICLES AND FISSION FRAGMENTS. Armenian Journal of Physics, 3 (4). pp. 282-291. ISSN 1829-1171

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Abstract

A low-pressure, position-sensitive, multi-wire proportional chamber (LPMWPC) system with an active area 12×12 cm2 for the detection of heavy nuclear fragments, has been developed for use in tagged photon beam experiments. The LPMWPC system can be operated in single as well as double step operational modes. In the case of double step operational mode with a high gas amplification factor, signals from α-particles reside well above the electronic noise. Typical energy loss spectra of alpha particles and fission fragments (FF) obtained from a 252Cf source are shown and discussed. The pulse height distributions of α-particles have a Landau distribution shape, while the pulse height distribution of FFs differs from Gaussian shape. It has long tails at both low- and high- energy sides. The average pulse height ratio of alpha particles and FF's is close to the theoretical value and amounts to about 1/80.

Item Type:Article
Subjects:Physics > 20.Nuclear physics
ID Code:302
Deposited By:Prof. Vladimir Aroutiounian
Deposited On:13 Dec 2010 18:47
Last Modified:19 Sep 2013 05:19

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