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内容記述 |
To reduce and eliminate the fluctuations in fluorescence intensity due to optical absorption and spherical aberration of the focused laser beam and color center concentrations between individual fluorescent nuclear track detectors (FNTD), we adopted the intensity of F22+ (2Mg) and F2+ (2Mg) color centers corresponding green and near‐infrared (NIR) colorations, which are conventionally called as background intensity, to develop the coloration-dependent correction methods to improve the FNTD-based heavy ion measurement, respectively. The FNTDs were irradiated with He, C, Ne, and Fe ions to make mono-energetic and multi-energetic samples and then to evaluate the performance of the correction methods. Both the green and NIR coloration-dependent correction methods can eliminate the fluctuations of fluorescence intensity in depth and decrease 39.7% and 38.9% of the coefficient of variation (CV), respectively. The green coloration-dependent correction method also reduces the fluctuation of fluorescence intensity due to color centers by decreasing 45.3% of CVw. The NIR coloration-dependent correction method performed ineffectively in fluctuation correction due to color centers compared with green coloration-dependent correction. Both the fluorescence intensities of He, C, and Fe tracks corrected by green and NIR coloration in multi-energetic samples coincide with that of mono-energetic samples. These methods provide reliable and normative approaches to carry out heavy ion measurement and have the potential to be applied in determining the LET of heavy ions. |
