Table 1. Photostimulated luminescence (PSL) determinations and PSL ratios of electron beam-irradiated mandarin oranges during storage (unit: photon counts/60 sec)
| PSL parameter | Irradiation dose (kGy) | Storage period (day) |
| 0 | 5 | 10 | 15 |
| PSL1 | 0 | 262.00±37.041) (-)2) | 325.00±18.33 (-) | 273.33±9.07 (-) | 289.33±24.50 (-) |
| 0.4 | 399.00±36.76 (-) | 328.00±37.36 (-) | 332.00±57.51 (-) | 305.33±56.45 (-) |
| 1 | 445.33±24.01 (-) | 395.33±4.16 (-) | 374.33±66.58 (-) | 336.00±24.76 (-) |
| PSL2 | 0 | 3,687±541 (M) | 3,238±322 (M) | 2,226±295 (M) | 3,146±518 (M) |
| 0.4 | 2,052±105 (M) | 2,440±575 (M) | 1,940±299 (M) | 1,900±409 (M) |
| 1 | 2,292±292 (M) | 3,400±40 (M) | 2,465±520 (M) | 2,275±304 (M) |
| PSL ratios (PSL2/PSL1) | 0 | 14.25±2.683) (N) | 16.62±5.52 (N) | 12.18±1.71 (N) | 17.19±2.55 (N) |
| 0.4 | 7.65±1.35 (I) | 8.04±1.09 (I) | 8.92±0.85 (I) | 8.03±2.53 (I) |
| 1 | 5.75±0.42 (I) | 7.54±1.72 (I) | 6.93±0.23 (I) | 6.48±0.64 (I) |
Mean±SD (n=3).
Threshold value: T1=700, T2=5,000, (-)<T11, T1<(M)<T2, (+)⟩T2.
PSL ratio (PSL2/PSL1): ratio>10 → non-irradiated (N), ratio<10 → irradiated (I).