2013 Fiscal Year Final Research Report

Challenge for understanding radiation induced track formation mechanism in the polymers with different chain length

Research Project

Project/Area Number	24656067
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Single-year Grants
Research Field	Applied physics, general
Research Institution	National Institute of Radiological Sciences
Principal Investigator	KODAIRA Satoshi 独立行政法人放射線医学総合研究所, 研究基盤センター, 研究員 (00434324)
Project Period (FY)	2012-04-01 – 2014-03-31
Keywords	放射線損傷 / 粒子線 / 飛跡 / 検出器 / 高分子
Research Abstract	We have verified the detection response for heavy ions and radiation induced bond breaking in the CR-39 polymer and other polymers with very similar structure for understanding the track formation mechanism in CR-39 plastic nuclear track detectors. We have fabricated 4 types polymers with different chain length. The basic performance such as etching properties, etch pit detection under the microscope and track formation sensitivity for various heavy ions has been carried out in HIMAC heavy ion accelerator. We have confirmed that these new polymers operate as nuclear track etch detectors. We have also measured the variation of infrared absorption spectra of polymers before and after the beam irradiation. The identification of C=O and C-O-C peaks and comparison among polymers have been successfully achieved.