1. Extremely high dose neutron dosimetry using CR-39 and atomic force microscopy
- Author
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T. Tsuruta, T. Takagi, M. Tsubomatsu, H. Morishima, Ikuo Kobayashi, Yasuhiro Koguchi, and Naoki Yasuda
- Subjects
inorganic chemicals ,Materials science ,Surface Properties ,Analytical chemistry ,Microscopy, Atomic Force ,Radiation Dosage ,Sensitivity and Specificity ,Polyethylene Glycols ,chemistry.chemical_compound ,Radiation Protection ,Neutron flux ,Etching ,Materials Testing ,Radiology, Nuclear Medicine and imaging ,Neutron ,CR-39 ,Radiation ,integumentary system ,Radiological and Ultrasound Technology ,Atomic force microscopy ,technology, industry, and agriculture ,Public Health, Environmental and Occupational Health ,Reproducibility of Results ,Dose-Response Relationship, Radiation ,General Medicine ,Equipment Design ,Polyethylene ,Equipment Failure Analysis ,chemistry ,biological sciences ,Neutron source ,lipids (amino acids, peptides, and proteins) ,Thermoluminescent Dosimetry ,Neutron dosimetry - Abstract
Atomic force microscopy (AFM) has been applied to the analysis of CR-39 nuclear track detectors for high dose neutron dosimetry. As a feasible study to extract the neutron dose, we have employed a (239)Pu-Be neutron source with the traditional track density measurement of recoil proton etch pits from a high density polyethylene (CH(2)) radiator. After very short etching ( approximately 1 microm), etch pit densities were measured as a function of neutron fluence (neutron dose) up to 1.4 x 10(10) cm(-2) (6.6 Sv). Neutron sensitivity was also measured to be 6.6 x 10(-4). Maximum measurable neutron dose was estimated to be approximately 200 Sv by measuring the fraction of the total image area occupied by the etch pits.
- Published
- 2006