Lyoluminescence dosimetry in photon and fast neutron beams

Abstract

The lyoluminescence (LL) technique using mannose, a monosaccharide, is described. Dose-response curves for 60Co-gamma-rays (5 rad to 120 krad), fission neutrons, 5.3 MeV and 15 MeV neutrons (100 rad to 20 krad) have been measured. The close tissue-equivalence of mannose makes this material well suited for dosimetric use in low energy X-ray fields for radiotherapy and radiobiology. It also provides a cheap, simple and reproducible dosemeter in industrial applications of radiation (sprouting inhibition of onions and potatoes; control of insect infestation). After correction for the gamma contamination of the neutron beam the LL signal per rad in ICRU muscle tissue from the neutron irradiations has been derived and the relative effectiveness of the LL signal for fast neutrons in mannose has been calculated as 0.34 +/- 0.03 (fission neutrons), 0.63 +/- 0.07 (5.3 MeV neutrons) and 0.74 +/- 0.05 (15 MeV neutrons). These results are compared with data from other systems. It is concluded that mannose can be used as a transfer system in neutron dosimetry, if its variation in sensitivity with neutron energy is taken into account.

EPR dosimetry in a mixed neutron and gamma radiation field

“…Detection limit estimated around 0.5 Gy did not allow estimating dose in the steady state experiment. Mannose results are consistent with the literature; for instance, with lyoluminescence techniques; Puite et al (16) and Ettinger et al found respectively a response relatively to 60 Co gamma rays of 0.34 for ®ssion neutrons and 0.2 for 1 MeV neutrons. As for commercial sugar, mannose showed a time dependence shape line spectrum modi®cation, which was already observed by Bartlett et al (28) .…”

“…Mannose, whose neutron response was already studied by lyoluminescence (16,17) , was also investigated as an EPR material for criticality dosimetry.…”

Characteristics of the Fréedericksz effect specific to optical fields

“…Thus, the lower limit of detection of radiation dose was improved down to 10 mGy (1 rad) using a special sample of trehalose dihydrate. For most saccharides, the lyoluminescence dependence on radiation dose is fairly linear up to l kGy (100 krad) with a variation in linearity ranging between 10-20% (Atari 1973 Investigation of the lyoluminescence response of saccharides to radiations of different linear energy transfer (LET) including protons, a-particles, 3He2+ and neutrons have indicated a dependence on the radiation quality (Puite and Crebolder 1977, Ettinger et a1 1980, Bartlett and Edwards 1980. Some of these studies used mannose and glucose.H20 irradiated by negative pions produced at the Rutherford Laboratory, UK (Bartlett et a1 1981).…”

A lyoluminescent tissue-equivalent dosemeter for pion therapy beams

“…For most saccharides, the lyoluminescence dependence on radiation dose is fairly linear up to l kGy (100 krad) with a variation in linearity ranging between 10-20% (Atari 1973). 0031-9155/83/050493 + 10$02.00 @ 1983 The Institute of Physics Investigation of the lyoluminescence response of saccharides to radiations of different linear energy transfer (LET) including protons, a-particles, 3He2+ and neutrons have indicated a dependence on the radiation quality (Puite and Crebolder 1977, Ettinger et a1 1980, Bartlett and Edwards 1980. Some of these studies used mannose and glucose.H20 irradiated by negative pions produced at the Rutherford Laboratory, UK (Bartlett et a1 1981).…”