The phase composition and subsurface current (90−580 K) were studied in expired scintillators made from doped LiF crystals after irradiation with 4 MeV electron fluencies 1013-1015 el/cm2 at beam current densities 100−400 nA/cm2 at >300 K. Different critical temperatures were found, above which the ionic transport mechanism dominates (F− at 1013 cm-2 370 K, and Li+ at 465 K, at 1014 cm-2 480 K and 1015 cm-2 450 K – Li+ , Н+ and O− ). The calculated activation energy was found to decrease with the fluency growth from 1013 to 1015 cm−2 . The complex phase of 2LiF-3B2O3 solid solution was discovered in the expired scintillator, which transformed into LiBH4 and LiH nanophases upon 1015 el/cm2 . Appearance of B and H is possible result of nuclear reactions in LiF under 4 MeV electron beam, and their contribution should be taken into account in the ionic conductivity of thermoluminescent dosimeters and detectors.
| Mualliflar | Амонов, М.З., Ибрагимова, Э.М., Сандалов, В.Н., Зиядуллаев, М.М., Саттарова, Ш.Г. |
|---|---|
| Jurnal | O‘zbekiston fizika jurnali |
| Nashr sanasi | 2020-01-06 |
| Jild | 22 |
| Son | 3 |
| Betlar | 174-181 |
| Til | Rus |
| DOI | 10.52304/.v22i3.156 |
DOI: 10.52304/.v22i3.156 · Maqolaning asl sahifasi
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