Effects of Short-Term X-Ray Radiation on Low-Density Polyethylene Properties

One of the major high-energy rays emitted by medical linear accelerators, X-rays pose significant challenges to the special-purpose cables that play a critical role throughout the system. In this study, low-density polyethylene (LDPE), which is widely used as a raw material for special-purpose cables in medical, military, and defense applications, was selected as the research subject. Using steady-state X-ray irradiation of varying short-term exposure durations, we investigated whether X-rays could degrade the intrinsic properties of LDPE material. By analyzing and comparing the leakage current, isothermal relaxation current, and Fourier-transform infrared (FTIR) spectra of both untreated and irradiated LDPE samples, the study demonstrates that X-ray irradiation under specific conditions has a certain effect on the intrinsic properties of LDPE. These findings provide guidance for experimental and operational environments that utilize LDPE materials, highlighting the importance of controlling environmental exposure levels.