Matches in SemOpenAlex for { <https://semopenalex.org/work/W1974509074> ?p ?o ?g. }
Showing items 1 to 85 of
85
with 100 items per page.
- W1974509074 endingPage "2431" @default.
- W1974509074 startingPage "2411" @default.
- W1974509074 abstract "The factor Kwall to correct for photon attenuation and scatter in the wall of ionization chambers for 60Co air-kerma measurement has been traditionally determined by a procedure based on a linear extrapolation of the chamber current to zero wall thickness. Monte Carlo calculations by Rogers and Bielajew (1990 Phys. Med. Biol. 35 1065-78) provided evidence, mostly for chambers of cylindrical and spherical geometry, of appreciable deviations between the calculated values of Kwall and those obtained by the traditional extrapolation procedure. In the present work an experimental method other than the traditional extrapolation procedure was used to determine the Kwall factor. In this method the dependence of the ionization current in a cylindrical chamber was analysed as a function of an effective wall thickness in place of the physical (radial) wall thickness traditionally considered in this type of measurement. To this end the chamber wall was ideally divided into distinct regions and for each region an effective thickness to which the chamber current correlates was determined. A Monte Carlo calculation of attenuation and scatter effects in the different regions of the chamber wall was also made to compare calculation to measurement results. The Kwall values experimentally determined in this work agree within 0.2% with the Monte Carlo calculation. The agreement between these independent methods and the appreciable deviation (up to about 1%) between the results of both these methods and those obtained by the traditional extrapolation procedure support the conclusion that the two independent methods providing comparable results are correct and the traditional extrapolation procedure is likely to be wrong. The numerical results of the present study refer to a cylindrical cavity chamber like that adopted as the Italian national air-kerma standard at INMRI-ENEA (Italy). The method used in this study applies, however, to any other chamber of the same type." @default.
- W1974509074 created "2016-06-24" @default.
- W1974509074 creator A5019806023 @default.
- W1974509074 creator A5023804873 @default.
- W1974509074 creator A5032185494 @default.
- W1974509074 creator A5064797680 @default.
- W1974509074 date "2002-07-03" @default.
- W1974509074 modified "2023-09-26" @default.
- W1974509074 title "Determination of the Kwall correction factor for a cylindrical ionization chamber to measure air-kerma in 60Co gamma beams" @default.
- W1974509074 cites W1982856927 @default.
- W1974509074 cites W1983006663 @default.
- W1974509074 cites W1997569231 @default.
- W1974509074 cites W2061818460 @default.
- W1974509074 cites W2072474881 @default.
- W1974509074 cites W2082405966 @default.
- W1974509074 cites W2153563656 @default.
- W1974509074 cites W2793927805 @default.
- W1974509074 doi "https://doi.org/10.1088/0031-9155/47/14/304" @default.
- W1974509074 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12171331" @default.
- W1974509074 hasPublicationYear "2002" @default.
- W1974509074 type Work @default.
- W1974509074 sameAs 1974509074 @default.
- W1974509074 citedByCount "10" @default.
- W1974509074 countsByYear W19745090742019 @default.
- W1974509074 crossrefType "journal-article" @default.
- W1974509074 hasAuthorship W1974509074A5019806023 @default.
- W1974509074 hasAuthorship W1974509074A5023804873 @default.
- W1974509074 hasAuthorship W1974509074A5032185494 @default.
- W1974509074 hasAuthorship W1974509074A5064797680 @default.
- W1974509074 hasConcept C105795698 @default.
- W1974509074 hasConcept C120665830 @default.
- W1974509074 hasConcept C121332964 @default.
- W1974509074 hasConcept C132459708 @default.
- W1974509074 hasConcept C145148216 @default.
- W1974509074 hasConcept C151770136 @default.
- W1974509074 hasConcept C159317903 @default.
- W1974509074 hasConcept C178639098 @default.
- W1974509074 hasConcept C184652730 @default.
- W1974509074 hasConcept C19499675 @default.
- W1974509074 hasConcept C198291218 @default.
- W1974509074 hasConcept C2989005 @default.
- W1974509074 hasConcept C30475298 @default.
- W1974509074 hasConcept C33923547 @default.
- W1974509074 hasConcept C62520636 @default.
- W1974509074 hasConcept C71924100 @default.
- W1974509074 hasConcept C75088862 @default.
- W1974509074 hasConceptScore W1974509074C105795698 @default.
- W1974509074 hasConceptScore W1974509074C120665830 @default.
- W1974509074 hasConceptScore W1974509074C121332964 @default.
- W1974509074 hasConceptScore W1974509074C132459708 @default.
- W1974509074 hasConceptScore W1974509074C145148216 @default.
- W1974509074 hasConceptScore W1974509074C151770136 @default.
- W1974509074 hasConceptScore W1974509074C159317903 @default.
- W1974509074 hasConceptScore W1974509074C178639098 @default.
- W1974509074 hasConceptScore W1974509074C184652730 @default.
- W1974509074 hasConceptScore W1974509074C19499675 @default.
- W1974509074 hasConceptScore W1974509074C198291218 @default.
- W1974509074 hasConceptScore W1974509074C2989005 @default.
- W1974509074 hasConceptScore W1974509074C30475298 @default.
- W1974509074 hasConceptScore W1974509074C33923547 @default.
- W1974509074 hasConceptScore W1974509074C62520636 @default.
- W1974509074 hasConceptScore W1974509074C71924100 @default.
- W1974509074 hasConceptScore W1974509074C75088862 @default.
- W1974509074 hasIssue "14" @default.
- W1974509074 hasLocation W19745090741 @default.
- W1974509074 hasLocation W19745090742 @default.
- W1974509074 hasOpenAccess W1974509074 @default.
- W1974509074 hasPrimaryLocation W19745090741 @default.
- W1974509074 hasRelatedWork W1968806488 @default.
- W1974509074 hasRelatedWork W1974509074 @default.
- W1974509074 hasRelatedWork W1997097636 @default.
- W1974509074 hasRelatedWork W2012452227 @default.
- W1974509074 hasRelatedWork W2080476152 @default.
- W1974509074 hasRelatedWork W2081008747 @default.
- W1974509074 hasRelatedWork W2091558570 @default.
- W1974509074 hasRelatedWork W2100646527 @default.
- W1974509074 hasRelatedWork W2462613341 @default.
- W1974509074 hasRelatedWork W2914151548 @default.
- W1974509074 hasVolume "47" @default.
- W1974509074 isParatext "false" @default.
- W1974509074 isRetracted "false" @default.
- W1974509074 magId "1974509074" @default.
- W1974509074 workType "article" @default.