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An instrument for measuring ambient dose equivalent, H*(10)
Linköping University, Department of Medicine and Care, Radiation Physics. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Medicine and Care, Radio Physics. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Centre of Surgery and Oncology, Department of Radiation Physics.ORCID iD: 0000-0003-0209-498X
Linköping University, Department of Medicine and Care, Radiation Physics. Linköping University, Faculty of Health Sciences.
Östergötlands Läns Landsting, Centre of Surgery and Oncology, Department of Radiation Physics. Linköping University, Department of Medicine and Care, Radiation Physics. Linköping University, Faculty of Health Sciences.
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1996 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 67, no 1, 33-39 p.Article in journal (Refereed) Published
Abstract [en]

The design and calibration of a small and simple instrument for measuring the ambient dose equivalent, H*(10), in photon fields is described. Comprising a thermoluminescence LiF dosemeter inside a 20 mm diameter PMMA sphere, it is capable of measuring the ambient dose equivalent with a nearly isotropic response. In the interval 0.1-100 mSv and for the energy range 30 keV to 1.25 MeV the energy response is within -31% and +15% relative to that of 137Cs gamma radiation (662 keV). In practical use, it is therefore sufficient to calibrate the instrument in a 137Cs gamma field using the corresponding conversion coefficient H*(10)/Kair taken from tabulations. The possibility of using the instrument to monitor the ambient dose equivalent for energies above 1.25 MeV is discussed and indicates that the range of applicability can be extended to 4.4 MeV with an energy response within -10% relative to 662 keV.

Place, publisher, year, edition, pages
1996. Vol. 67, no 1, 33-39 p.
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Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-51629OAI: oai:DiVA.org:liu-51629DiVA: diva2:276120
Available from: 2009-11-10 Created: 2009-11-10 Last updated: 2017-12-12

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Alm Carlsson, GudrunLund, EvaPettersson, Håkan

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