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RESEARCH PRODUCT
F centre production in CsI and CsI–Tl crystals under Kr ion irradiation at 15 K
Emmanuel BalanzatAnatoli I. PopovAnatoli I. Popovsubject
Nuclear and High Energy PhysicsChemistryAbsorption bandExcitonVacancy defectDopingAnalytical chemistryIrradiationAbsorption (chemistry)Atomic physicsLuminescenceInstrumentationIondescription
Abstract We present results of simultaneous in situ luminescence and optical absorption studies in scintillator CsI and CsI–Tl crystals, exposed to very dense electronic excitations induced by 86Kr ions (8.63 MeV/amu). Irradiation at 15 K leads to the formation of the prominent F absorption band. In addition, several other features of the broad absorption between exciton and F bands were ascribed to an anion vacancy, α centre (240 nm), self-trapped hole, Vk centre (410 nm) and interstitials, H centres (560 nm). We have found that low doping of thallium (∼1017 cm−3) causes the F centre formation to proceed more rapidly than in pure crystal. On the other hand, we were not able to create any amount of F centres in heavily doped CsI–Tl. We have shown that point defects created by heavy ions manifested themselves in luminescence ageing.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-05-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |