Analysis of Relaxation Times of Radicals in Irradiated Black Pepper Using Pulse-ESR and CW-ESR

Hiromi Kameya; Masahiro Kikuchi; Setsuko Todoriki; Masakazu Furuta; Yasuhiko Kobayashi; Hideyuki Hara; Yuhei Shimoyama; Mitsuko Ukai

doi:10.5986/jrafi.47.6

Original

Analysis of Relaxation Times of Radicals in Irradiated Black Pepper Using Pulse-ESR and CW-ESR

Hiromi Kameya, Masahiro Kikuchi, Setsuko Todoriki, Masakazu Furuta, Yasuhiko Kobayashi, Hideyuki Hara, Yuhei Shimoyama, Mitsuko Ukai

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Keywords: CW-ESR, pulse-ESR, γ-ray irradiation, relaxation time

JOURNAL FREE ACCESS

2012 Volume 47 Issue 1 Pages 6-10

DOI https://doi.org/10.5986/jrafi.47.6

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Abstract

We attempted measurement of radicals in irradiated black pepper using pulse-ESR and CW-ESR. Relaxation times (T₁, T₂) of radicals in black pepper were measured using pulse-ESR. T₁ and T₂ were also calculated theoretical analysis using CW-ESR parameter. We succeeded in measurement of the field swept echo of irradiated black pepper using pulse-ESR. Pulse-ESR and CW-ESR were able to calculate T₁ and T₂. T₁ values were showed no dose dependence. T₂ values showed increase according to irradiation. We revealed that T₁ and T₂ from pulse-ESR and CW-ESR were changed similarly before and after irradiation.

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