Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Myung-Ho Kook"'
Autor:
Geon Hee Kim, Hae Young Choi, Seon Young Ryu, Myung Ho Kook, Jae-Young Kim, Sun Choel Yang, Ki Soo Chang
Publikováno v:
Sensors, Vol 12, Iss 4, Pp 4648-4660 (2012)
A method of measuring the precise temperature distribution of GaN-based light-emitting diodes (LEDs) by quantitative infrared micro-thermography is reported. To reduce the calibration error, the same measuring conditions were used for both calibratio
Externí odkaz:
https://doaj.org/article/2f6d560df748430c8465e623f2a08e39
Publikováno v:
Sellwood, E L, Kook, M & Jain, M 2022, ' Rapid in situ assessment of luminescence-bleaching depths for deriving burial and exposure chronologies of rock surfaces ', Quaternary Geochronology, vol. 67, 101227 . https://doi.org/10.1016/j.quageo.2021.101227
Recent developments in luminescence dating offer new ways to date exposure and burial durations of rocks. The new rock surface dating methods ideally require high-resolution data, faster sample preparation and measurement times, and field screening m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::062b8d16be65f1da6c6ba4df1ce08080
https://orbit.dtu.dk/en/publications/adc85d27-258f-4c55-b10e-747ea0938904
https://orbit.dtu.dk/en/publications/adc85d27-258f-4c55-b10e-747ea0938904
Publikováno v:
Bu, M, Murray, A S, Kook, M, Buylaert, J P & Thomsen, K J 2021, ' The application of full spectrum analysis to NaI(Tl) gamma spectrometry for the determination of burial dose rates ', Geochronometria, vol. 48, pp. 161–170 . https://doi.org/10.2478/geochr-2020-0009
In this study, we explored the potential of a NaI(Tl) scintillator-based gamma spectrometer for the accurate determination of burial dose rates in natural geological samples using a full spectrum analysis (FSA) approach. In this method, an iterative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b3aa5305289a8fa1092a5f43bf3f9c0
https://pure.au.dk/ws/files/306992799/10.2478_geochr_2020_0009.pdf
https://pure.au.dk/ws/files/306992799/10.2478_geochr_2020_0009.pdf
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-15 (2020)
Jain, M, Kumar, R & Kook, M 2020, ' A novel coupled RPL/OSL system to understand the dynamics of the metastable states ', Scientific Reports, vol. 10, no. 1, 15565 . https://doi.org/10.1038/s41598-020-72434-4
Scientific Reports
Jain, M, Kumar, R & Kook, M 2020, ' A novel coupled RPL/OSL system to understand the dynamics of the metastable states ', Scientific Reports, vol. 10, no. 1, 15565 . https://doi.org/10.1038/s41598-020-72434-4
Scientific Reports
Metastable states form by charge (electron and hole) capture in defects in a solid. They play an important role in dosimetry, information storage, and many medical and industrial applications of photonics. Despite many decades of research, the exact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42c6989cb4516e9b0cf75923ef3a5bae
http://arxiv.org/abs/2002.01340
http://arxiv.org/abs/2002.01340
Publikováno v:
Kumar, R, Kook, M, Murray, A S & Jain, M 2018, ' Towards direct measurement of electrons in metastable states in K-feldspar : Do infrared-photoluminescence and radioluminescence probe the same trap? ', Radiation Measurements, vol. 120, pp. 7-13 . https://doi.org/10.1016/j.radmeas.2018.06.018
Kumar, R, Kook, M, Murray, A S & Jain, M 2018, ' Towards direct measurement of electrons in metastable states in K-feldspar: Do infrared-photoluminescence and radioluminescence probe the same trap? ', Radiation Measurements, vol. 120, pp. 7-13 . https://doi.org/10.1016/j.radmeas.2018.06.018
Kumar, R, Kook, M, Murray, A S & Jain, M 2018, ' Towards direct measurement of electrons in metastable states in K-feldspar: Do infrared-photoluminescence and radioluminescence probe the same trap? ', Radiation Measurements, vol. 120, pp. 7-13 . https://doi.org/10.1016/j.radmeas.2018.06.018
Prasad et al. (2017) recently developed a new method of measuring the dosimetric signal in feldspar, based on a Stokes-shifted photoluminescence emission (excitation energy ∼ 1.40eV (885 nm), emission energy ∼ 1.30eV (955 nm)). The new signal, te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70e5f80e62632d56a5db534385bd192f
https://doi.org/10.1016/j.radmeas.2018.06.018
https://doi.org/10.1016/j.radmeas.2018.06.018
Publikováno v:
Thomsen, K J, Kook, M, Murray, A S & Jain, M 2018, ' Resolving luminescence in spatial and compositional domains ', Radiation Measurements, vol. 120, pp. 260-266 . https://doi.org/10.1016/j.radmeas.2018.06.002
Radiation Measurements
Radiation Measurements
It is desirable to be able to establish the relationship between the spatial distribution of luminescence and chemical composition/mineralogy. This is especially true in complex, heterogeneous samples such as solid coarse-grained rock slices and sepa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3febf3759be4bb4ebafd65c4c56edfd3
https://doi.org/10.1016/j.radmeas.2018.06.002
https://doi.org/10.1016/j.radmeas.2018.06.002
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
Prasad, A K, Poolton, N R J, Kook, M & Jain, M 2017, ' Optical dating in a new light: A direct, non-destructive probe of trapped electrons ', Scientific Reports, vol. 7, 12097 . https://doi.org/10.1038/s41598-017-10174-8
Scientific Reports
Prasad, A K, Poolton, N R J, Kook, M & Jain, M 2017, ' Optical dating in a new light: A direct, non-destructive probe of trapped electrons ', Scientific Reports, vol. 7, 12097 . https://doi.org/10.1038/s41598-017-10174-8
Scientific Reports
Optical dating has revolutionized our understanding of Global climate change, Earth surface processes, and human evolution and dispersal over the last ~500 ka. Optical dating is based on an anti-Stokes photon emission generated by electron-hole recom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::895a3a1f1b2782db8dc6b51cd85712be
http://link.springer.com/article/10.1038/s41598-017-10174-8
http://link.springer.com/article/10.1038/s41598-017-10174-8
Autor:
Raju Kumar, J. De Grave, Lisa I. D. J. Martin, Mayank Jain, Myung Ho Kook, Dirk Poelman, Dimitri Vandenberghe
Publikováno v:
Kumar, R, Martin, L I D J, Poelman, D, Vandenberghe, D, De Grave, J, Kook, M & Jain, M 2020, ' Site-selective mapping of metastable states using electron-beam induced luminescence microscopy ', Scientific Reports, vol. 10, no. 1, 15650 . https://doi.org/10.1038/s41598-020-72334-7
SCIENTIFIC REPORTS
Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
SCIENTIFIC REPORTS
Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
Metastable states created by electron or hole capture in crystal defects are widely used in dosimetry and photonic applications. Feldspar, the most abundant mineral in the Earth’s crust (> 50%), generates metastable states with lifetimes of million
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92504b3ca41eb8b1761f05fc6b8a3398
https://orbit.dtu.dk/en/publications/29dde33b-d7dd-40f5-9b40-d60cafdf2a19
https://orbit.dtu.dk/en/publications/29dde33b-d7dd-40f5-9b40-d60cafdf2a19
Autor:
Kristina Hippe, Myung Ho Kook, E. L. Sellwood, Benny Guralnik, Jakob Wallinga, Amit Kumar Prasad, Reza Sohbati, Mayank Jain
Publikováno v:
Sellwood, E L, Guralnik, B, Kook, M, Prasad, A K, Sohbati, R, Hippe, K, Wallinga, J & Jain, M 2019, ' Optical bleaching front in bedrock revealed by spatially-resolved infrared photoluminescence ', Scientific Reports, vol. 9, 2611 . https://doi.org/10.1038/s41598-019-38815-0
Scientific Reports, 9(1)
Sellwood, E L, Guralnik, B, Kook, M, Prasad, A K, Sohbati, R, Hippe, K, Wallinga, J & Jain, M 2019, ' Optical bleaching front in bedrock revealed by spatially-resolved infrared photoluminescence ', Scientific Reports, vol. 9, no. 1, 2611 . https://doi.org/10.1038/s41598-019-38815-0
Scientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
Scientific Reports 9 (2019) 1
Scientific Reports
Scientific Reports, 9(1)
Sellwood, E L, Guralnik, B, Kook, M, Prasad, A K, Sohbati, R, Hippe, K, Wallinga, J & Jain, M 2019, ' Optical bleaching front in bedrock revealed by spatially-resolved infrared photoluminescence ', Scientific Reports, vol. 9, no. 1, 2611 . https://doi.org/10.1038/s41598-019-38815-0
Scientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
Scientific Reports 9 (2019) 1
Scientific Reports
Optically stimulated luminescence (OSL) dating of sediment, based on the accumulation of trapped charge in natural crystals since their last exposure to daylight, has revolutionised our understanding of the late Quaternary period. Recently, a complem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99455e72972d1b4eff390cee48ed3542
https://pure.au.dk/portal/da/publications/optical-bleaching-front-in-bedrock-revealed-by-spatiallyresolved-infrared-photoluminescence(0d36f66f-558f-4b06-b2a6-5077c182a5a7).html
https://pure.au.dk/portal/da/publications/optical-bleaching-front-in-bedrock-revealed-by-spatiallyresolved-infrared-photoluminescence(0d36f66f-558f-4b06-b2a6-5077c182a5a7).html
Publikováno v:
Quaternary Geochronology. 62:101147
Infrared photoluminescence (IRPL) is a Stokes-shifted emission arising from radiative relaxation of the excited state of the principal dosimetric tap in feldspar. Recent investigations have revealed that there exist two IRPL emissions at 880 nm and 9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8837d2275c3b7fbaca140be5ff071721
https://doi.org/10.1016/j.quageo.2020.101147
https://doi.org/10.1016/j.quageo.2020.101147