Photometric Papers Sensitive Only to Short Wave Ultraviolet

Chalkley, Lyman

doi:10.1364/josa.42.000387

Cited by 25 publications

(3 citation statements)

References 5 publications

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“…Much of the effort has been carried out at the U.S. National Institute of Standards and Technology ͑formerly the National Bureau of Standards͒, initially with support from the Division of Isotopes Development, U.S. Atomic Energy Commission, and with the assistance of the inventor of ultraviolet sensitive systems, L. Chalkley. 3 With the recent improvement in the accuracy and precision of film manufacturing, as well as the ruggedness and ease of use, radiochromic dosimeters have become increasingly popular in medical and nonmedical applications. Over the past several years the dosimetric properties of radiochromic dosimeters have been evaluated by many investigators and extensive literature on various aspects of radiochromic dosimetry has appeared.…”

Section: Introductionmentioning

confidence: 99%

Radiochromic film dosimetry: Recommendations of AAPM Radiation Therapy Committee Task Group 55

et al. 1998

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Section: Introductionmentioning

confidence: 99%

Radiochromic film dosimetry: Recommendations of AAPM Radiation Therapy Committee Task Group 55

et al. 1998

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“…A number of such data sets should be obtained for all the relative humidities encountered at the dosimetry measurement site. 3. The delayed darkening effect can then be accounted for and corrected by noting the time starting from the middle of the radiation time period until the measurement is to be made.…”

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confidence: 99%

Delayed Darkening of Radiation-Exposed Radiochromic Dye Dosimeters

Danchenko¹,

Griffin²,

Brashears³

1981

IEEE Trans. Nucl. Sci.

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Thin dosimetry films, type FWT-60, consisting ofhexahydroxyethyl pararosaniline cyanide dye in a Dupont Nylon resin, have been found to exhibit a considerable delayed darkening that may, depending on relative humidity, last for tens of hours at room temperature, until full color saturation is reached. Erroneous dosimetry measurements may therefore result if optical density measurements are made before this delayed darkening has proceeded to saturation. This effect has been investigated using both 1 MeV electrons and Co-60 gamma rays, and has been found to be independent of dose rate in the range 0.7 to 70 Gy, radiation species (electrons or gamma rays), and the percentage of total radiation dose which it represents. The amount of delayed darkening, i.e., the percentage of optical density at saturation, was found to depend very strongly on the relative humidity at which the films were equilibrated a few hours before irradiation. The delayed darkening which remained 10 minutes after irradiation was found to be 45% for nominal 0% RH (1 hour in vacuum), 23% for 25-35% RH, and less than 3% for 65-75% RH. Heating the films for 1 minute at 45°C effects a decrease in delayed darkening from 45% to 20%, and for 5 minutes, the decrease is to less than 5%. A number of recommendations are made to account for delayed darkening in FWT-60 films in order to maximize accuracy and repeatability of dosimetry measurements.

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“…Επίσης χρησιμοποιήθηκαν για τη διάκριση και τη μέτρηση της ερυθηματογόνου δόσης. Οι Weyde (Weyde and Frankenburger, 1930;Weyde and Frankenburger, 1931) και Chalkley (Chalkley, 1952) Chalkley, 1965;McLaughlin and Chalkley, 1965;McLaughlin, 1966). (Lin and Chiu, 2003;Smets, 1983;Lin, 2003;Kim et al, 2006;Lee et al, 2004;Choi et al, 2003;Mistry et al, 1997).…”

Section: δοσίμετραunclassified

Ηλεκτροχημική Μελέτη Φωτοευαίσθητων Ενώσεων Και Εφαρμογές Αυτών Στους Χημικούς Δείκτες Υπεριώδους Ακτινοβολίας

Σαμολαδάς¹

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Καθηγητής Παπαδογιάννης Ιωάννης (Μέλος Συμβουλευτικής Επιτροπής) Καθηγητής Ζερεφός Χρήστος (Μέλος Συμβουλευτικής Επιτροπής) Καθηγήτρια Θεωδορίδου Έλλη (Α.Π.Θ.) Αν. Καθηγητής Γιαννακουδάκης Παναγιώτης (Α.Π.Θ.) Αν. Καθηγητής Παρασκευόπουλος Κωνσταντίνος (Α.Π.Θ.) Επ. Καθηγητής Μπικιάρης Δημήτριος (Α.Π.Θ.) Η επταμελής εξεταστική επιτροπή που διορίσθηκε για την κρίση της Διδακτορικής Διατριβής του κ. Σαμολαδά Αντώνιου, Χημικού, συνήλθε σε συνεδρίαση στο Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης την 31 η Οκτωβρίου 2005, όπου παρακολούθησε την υποστήριξη της διατριβής με τίτλο : "Ηλεκτροχημική μελέτη φωτοευαίσθητων ενώσεων και εφαρμογές αυτών στους χημικούς δείκτες υπεριώδους ακτινοβολίας". Η επιτροπή έκρινε ομόφωνα ότι η διατριβή είναι πρωτότυπη και αποτελεί ουσιαστική συμβολή στην πρόοδο της Επιστήμης.

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Photometric Papers Sensitive Only to Short Wave Ultraviolet

Cited by 25 publications

References 5 publications

Radiochromic film dosimetry: Recommendations of AAPM Radiation Therapy Committee Task Group 55

Radiochromic film dosimetry: Recommendations of AAPM Radiation Therapy Committee Task Group 55

Delayed Darkening of Radiation-Exposed Radiochromic Dye Dosimeters

Ηλεκτροχημική Μελέτη Φωτοευαίσθητων Ενώσεων Και Εφαρμογές Αυτών Στους Χημικούς Δείκτες Υπεριώδους Ακτινοβολίας

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