Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3
New near-infrared photoluminescence bands were observed in neutron-irradiated spinel single crystal upon excitation by a 532 nm laser. The surface morphology of the unirradiated and fast neutron-irradiated samples was investigated using atomic force microscopy and scanning probe microscopy. Fast neu...
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| Format: | Article |
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Elsevier
2016
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| author | Rahman, A.Z.M.S. Haseeb, A.S. Md. Abdul Xu, Q. Evslin, J. Cinausero, M. |
| author_facet | Rahman, A.Z.M.S. Haseeb, A.S. Md. Abdul Xu, Q. Evslin, J. Cinausero, M. |
| author_sort | Rahman, A.Z.M.S. |
| collection | UM |
| description | New near-infrared photoluminescence bands were observed in neutron-irradiated spinel single crystal upon excitation by a 532 nm laser. The surface morphology of the unirradiated and fast neutron-irradiated samples was investigated using atomic force microscopy and scanning probe microscopy. Fast neutron-irradiated samples show a strong emission peak at 1685 nm along with weak bands at 1065 and 2365 nm. The temperature dependence of the photoluminescence intensity was also measured. At lower temperatures, the dominant peak at 1685 nm shifts toward lower energy whereas the other peaks remain fixed. Activation energies of luminescence quenching were estimated to be 5.7 and 54.6 meV for the lower and higher temperature regions respectively. |
| first_indexed | 2024-03-06T05:42:31Z |
| format | Article |
| id | um.eprints-17444 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:42:31Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | um.eprints-174442018-10-17T00:41:49Z http://eprints.um.edu.my/17444/ Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3 Rahman, A.Z.M.S. Haseeb, A.S. Md. Abdul Xu, Q. Evslin, J. Cinausero, M. QC Physics TJ Mechanical engineering and machinery New near-infrared photoluminescence bands were observed in neutron-irradiated spinel single crystal upon excitation by a 532 nm laser. The surface morphology of the unirradiated and fast neutron-irradiated samples was investigated using atomic force microscopy and scanning probe microscopy. Fast neutron-irradiated samples show a strong emission peak at 1685 nm along with weak bands at 1065 and 2365 nm. The temperature dependence of the photoluminescence intensity was also measured. At lower temperatures, the dominant peak at 1685 nm shifts toward lower energy whereas the other peaks remain fixed. Activation energies of luminescence quenching were estimated to be 5.7 and 54.6 meV for the lower and higher temperature regions respectively. Elsevier 2016 Article PeerReviewed Rahman, A.Z.M.S. and Haseeb, A.S. Md. Abdul and Xu, Q. and Evslin, J. and Cinausero, M. (2016) Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3. Radiation Physics and Chemistry, 125. pp. 122-126. ISSN 0969-806X, DOI https://doi.org/10.1016/j.radphyschem.2016.04.001 <https://doi.org/10.1016/j.radphyschem.2016.04.001>. http://dx.doi.org/10.1016/j.radphyschem.2016.04.001 doi:10.1016/j.radphyschem.2016.04.001 |
| spellingShingle | QC Physics TJ Mechanical engineering and machinery Rahman, A.Z.M.S. Haseeb, A.S. Md. Abdul Xu, Q. Evslin, J. Cinausero, M. Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3 |
| title | Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3 |
| title_full | Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3 |
| title_fullStr | Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3 |
| title_full_unstemmed | Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3 |
| title_short | Laser excited novel near-infrared photoluminescence bands in fast neutron-irradiated MgO·nAl2O3 |
| title_sort | laser excited novel near infrared photoluminescence bands in fast neutron irradiated mgo·nal2o3 |
| topic | QC Physics TJ Mechanical engineering and machinery |
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