title: Melt-compounded composites of ethylene vinyl acetate with magnesium sulfate as flexible EPR dosimeters: Mechanical properties, manufacturing process feasibility and dosimetric characteristics.
abstract: Novel polymeric composites for radiation dosimetry were developed. The composites were prepared by solvent-free melt compounding of ethylene vinyl acetate (EVA) (40% vinyl) and magnesium sulfate (MgSO4). Mechanical properties, melt flow characteristics and dosimetric properties were investigated. The composites with up to 50% (wt) of MgSO4were flexible and capable of flow. The dose response of the EPR signal of the composites was studied in the dose range 3Gy-4kGy and found to be linear between 18Gy and 4kGy. The reproducibility of dose measurements was good. The signal fading rate and the energy dependence of the dose response were found to be acceptable.
authors.affiliation: Radiation Safety Systems Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Suman
authors.affiliation: Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
authors.forename: R M
authors.initials: RM
authors.lastname: Kadam
authors.affiliation: Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
authors.forename: R K
authors.initials: RK
authors.lastname: Mondal
authors.affiliation: Radiation Safety Systems Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
authors.forename: S
authors.initials: S
authors.lastname: Murali
authors.affiliation: Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
authors.forename: K A
authors.initials: KA
authors.lastname: Dubey
authors.affiliation: Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India. Electronic address: ykbhard@barc.gov.in.
authors.forename: Y K
authors.initials: YK
authors.lastname: Bhardwaj
authors.affiliation: Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
authors.forename: V
authors.initials: V
authors.lastname: Natarajan
keywords: EPR dosimetry; Ethylene vinyl acetate; Melt compounding