The energy resolution of high-pressure xenon-filled proportional counters

Author

Sakurai, H. ; Ramsey, B.D.

Author_Institution

NASA Marshall Space Flight Center, Huntsville, AL, USA

fYear

1991

fDate

2-9 Nov. 1991

Firstpage

1199

Abstract

The performance characteristics of xenon-filled proportional counters with different anode diameters have been measured for fill gas pressures from 1 to 10 atm. For 25 mu m anodes the resolution in pure xenon, for example, degrades from 7.5% at 1 atm to 9.4% at 10 atm, the corresponding figures for 12.5 mu m anodes being 7.1% and 9.1%, respectively. It is shown that these data are consistent with changes in the field in the avalanche region, which modify the energetics of the avalanche process, affect the partition of energy into ionization and excitation, and ultimately influence the statistics of the charge amplification process.<>

Keywords

ionisation of gases; proportional counters; xenon; 1 to 10 atm; 12.5 micron; 25 micron; Xe; anode diameters; avalanche region; charge amplification; energy resolution; excitation; fill gas pressures; ionization; performance characteristics; proportional counters; statistics; Anodes; Counting circuits; Degradation; Energy resolution; Ionization; Radiation detectors; Solid scintillation detectors; Steel; Wire; Xenon;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE

Conference_Location

Santa Fe, NM, USA

Print_ISBN

0-7803-0513-2

Type

conf

DOI

10.1109/NSSMIC.1991.259113

Filename

259113