Ion recombination in liquid ionization chambers: development of an experimental method to quantify general recombination

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:DiVA.org:umu-68942" > Ion recombination i...

1 of 1
Previous record
Next record
To hitlist

Details
MARC

Andersson, Jonas,1975-Umeå universitet,Radiofysik (author)

Ion recombination in liquid ionization chambers : development of an experimental method to quantify general recombination

BookEnglish2013

Publisher, publication year, extent ...

Umeå :Umeå universitet,2013
76 s.
electronicrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:umu-68942
ISBN:9789174596076
ISBN:9789174596083
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-68942URI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:vet swepub-contenttype
Subject category:dok swepub-publicationtype

Series

Umeå University medical dissertations,0346-6612 ;1567

Notes

An experimental method (the two-dose-rate method) for the correction of general recombination losses in liquid ionization chambers has been developed and employed in experiments with different liquids and radiation qualities. The method is based on a disassociation of initial and general recombination, since an ionized liquid is simultaneously affected by both of these processes.The two-dose-rate method has been compared to an existing method for general recombination correction for liquid ionization chambers, and has been found to be the most robust method presently available.The soundness of modelling general recombination in liquids on existing theory for gases has been evaluated, and experiments indicate that the process of general recombination is similar in a gas and a liquid. It is thus reasonable to employ theory for gases in the two-dose-rate method to achieve experimental corrections for general recombination in liquids. There are uncertainties in the disassociation of initial and general recombination in the two-dose-rate method for low applied voltages, where initial recombination has been found to cause deviating results for different liquids and radiation qualities.Sensitivity to ambient electric fields has been identified in the microLion liquid ionization chamber (PTW, Germany). Experimental data may thus be perturbed if measurements are conducted in the presence of ambient electric fields, and the sensitivity has been found to increase with an increase in the applied voltage. This can prove to be experimentally limiting since general recombination may be too severe for accurate corrections if the applied voltage is low.

Subject headings and genre

NATURVETENSKAP Fysik Annan fysik hsv//swe
NATURAL SCIENCES Physical Sciences Other Physics Topics hsv//eng
MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Radiologi och bildbehandling hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Radiology, Nuclear Medicine and Medical Imaging hsv//eng
General recombination
initial recombination
liquid ionization chamber
radiation dosimetry
radiofysik
radiation physics

Added entries (persons, corporate bodies, meetings, titles ...)

Tölli, Heikki,Filosofie doktorUmeå universitet,Radiofysik(Swepub:umu)heto0001 (thesis advisor)
Johansson, Lennart (thesis advisor)
Ahnesjö, Anders,ProfessorUppsala universitet (opponent)
Umeå universitetRadiofysik (creator_code:org_t)

Internet link

Find in a library

Ion recombination in liquid ionization chambers development of an experimental m... (Search the publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Andersson, Jonas ...; Tölli, Heikki, F ...; Johansson, Lenna ...; Ahnesjö, Anders, ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Radiology Nuclea ...

Parts in the series: Umeå University ...

By the university: Umeå University

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se