Pulse shape analysis in the liquid xenon multiwire ionisation chamber for PET

Author

Crespo, P. ; Chepe, V. ; Lopes, M.I. ; Janeiro, L. ; Marques, RFerreira ; Policarpo, A.J.P.L.

Author_Institution

Dept. de Fisica, Coimbra Univ., Portugal

Volume

45

Issue

3

fYear

1998

fDate

6/1/1998 12:00:00 AM

Firstpage

561

Lastpage

567

Abstract

A method of computation of the pulse shape in an ionisation chamber with wire collectors has been developed and verified experimentally with a test chamber. Good agreement between the calculated waveforms and the acquired signals is obtained. Having proved its reliability, the same method was applied to study the dependence of the signal pulse shape and amplitude on the location of primary ionisation due to 511 keV γ-rays in the liquid xenon multiwire ionisation chamber for PET. A method of real-time amplitude correction for this effect is suggested, resulting in significant improvement of energy resolution. The simulated resolution for 511 keV γ-rays is 15%

Keywords

liquid ionisation chambers; photoionisation; positron emission tomography; γ-rays; 511 keV; PET; amplitude; energy resolution; liquid Xe; multiwire ionisation chamber; primary ionisation; pulse shape; real-time amplitude correction; signal pulse shape; wire collectors; Cathodes; Electrodes; Electron mobility; Ionization chambers; Positron emission tomography; Preamplifiers; Pulse shaping methods; Shape; Wire; Xenon;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.682448

Filename

682448