Determination of microdosimetric parameters in time-varying radiation fields: the variance-covariance method

Journal Article · Wed Feb 01 04:00:00 EST 1984 · Radiat. Res.; (United States)

DOI:https://doi.org/10.2307/3576275· OSTI ID:5116598

Kellerer, A M ^[1]; Rossi, H H

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1. Inst. fuer Medizinische Strahlenkunde der Univ. Wuerzburg, West Germany

Microdosimetric measurements in their usual form are difficult in fields of high intensity where events, i.e., passages of charged particles, cannot be individually resolved. The variance method can then be utilized to obtain the dose averages of the microdosimetric distributions from repeated measurements over finite time intervals. An essential condition for the method is that the dose per measurement interval is constant, but this condition cannot be fulfilled in accelerator-produced fields that consist of variable radiation pulses. A modified method is therefore proposed that does not require equal doses per measurement interval. It utilizes two detectors that operate in phase, and it derives the microdosimetric parameters from the difference between the variance of the signal from one detector and the covariance of the concomitant signals from the two detectors.

• DOE Contract Number: AC02-78EV04733
• OSTI ID: 5116598
• Journal Information: Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 97:2; ISSN RAREA
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
BARYONS
CALCULATION METHODS
DOSIMETRY
ELEMENTARY PARTICLES
ENERGY LOSSES
ENERGY RESOLUTION
FAST NEUTRONS
FERMIONS
HADRONS
LOSSES
MEASURING INSTRUMENTS
MICRODOSIMETRY
MONTE CARLO METHOD
NEUTRONS
NUCLEONS
RADIATION DETECTORS
RESOLUTION