Discovery and development of new scintillation materials that will form the basis for the next generation of gamma-ray, x-ray, and neutron detectors.
Characterization of new luminescent materials via optical and x-ray spectroscopy.
Implementation of emerging scintillator technology in medical imaging systems, homeland security inspection systems, neutron and particle physics experiments, and remote sensing.
Single crystal growth and powder synthesis of novel scintillation materials.
PhD, Washington University, St. Louis
Awards and Recognitions
Fellow, IEEE (2014)
Citation for Success in Multidisciplinary Research: University of Tennessee (2013)
Merit Award: IEEE Nuclear and Plasma Sciences Society (2006)
Mohit Tyagi, Harold Rothfuss, Samuel Donnald, Merry Koschan, Charles L. Melcher, "Effect of Ca2+ co-doping the scintillation kinetics of Ce-doped Gd2Ga3Al2O12," IEEE Trans. Nuc. Science 61(1) 297-300, 2014. http://dx.doi.org/10.1109/TNS.2013.2276101
Hua Wei, Mariya Zhuravleva, and Charles L. Melcher, "Scintillation Properties of Cs3LaCl6:Ce3+ and Cs3LaBr6:Ce3+," Trans. Nuc. Sci. 61(1) 390-396, 2014. http://dx.doi.org/10.1109/TNS.2013.2282818
Mariya Zhuravleva, Stephan Friedrich, and Charles L. Melcher, "Oxidation state of europium in CsSrI3:Eu scintillator by X-ray absorption spectroscopy," Opt. Mater. 36(3) 670-674, 2014. http://dx.doi.org/10.1016/j.optmat.2013.11.008
Samuel Donnald, Mohit Tyagi, Harold Rothfuss, Merry Koschan, Jason Hayward, Charles L. Melcher, "Sample-to-sample variation in single crystal YAP:Ce nonproportionality," Trans. Nuc. Sci. 61(1) 332-338, 2014. http://dx.doi.org/10.1109/TNS.2013.2277860
Fang Meng, Merry Koschan, Mohit Tyagi, Charles L. Melcher, Peter Cohen, "A novel method to create an intrinsic reflective layer on a Gd3Ga3Al2O12:Ce scintillation crystal," Nuclear Inst. and Meth. in Phys. Res., A, 2014. http://dx.doi.org/10.1016/j.nima.2014.06.077
Mohit Tyagi, Mariya Zhuravleva, Charles L. Melcher, "Theoretical and experimental characterization of promising new scintillators: Eu2+ doped CsCaCl3 and CsCaI3," J. Appl. Phys. 113, 203504, 2013. http://dx.doi.org/10.1063/1.4807401
Samuel B. Donnald, Mohit Tyagi , Harold Rothfuss, Jason P. Hayward, Charles L Melcher, and Merry Koschan, "The Effect of B3+ and Ca2+ Co-Doping on Factors Which Affect the Energy Resolution of Gd3Ga3Al2O12:Ce," IEEE Trans. Nuc. Science 60(5) 4002-4006, 2013. http://dx.doi.org/10.1109/TNS.2013.2277862
H. Wei, M. Zhuravleva, K. Yang, B. Blalock, C. L. Melcher, "Effect of Ba substitution in CsSrI3: Eu2+," J. Crystal Growth 384, 27-32, 2013. http://dx.doi.org/10.1016/j.jcrysgro.2013.09.007
Mohit Tyagi, Fang Meng, Merry Koschan, Samuel B. Donnald, Harold Rothfuss, and Charles L. Melcher, "Effect of codoping on scintillation and optical properties of Ce doped Gd3Ga3Al2O12 scintillator," J. Phys. D: Appl. Phys. 46, 475302, 2013. http://dx.doi.org/10.1088/0022-3727/46/47/475302
Shi Chen, Hua Wei, Charles L. Melcher, and Yiquan Wu, "Spectroscopic properties of transparent Y3Al5O12: Eu ceramics," Optical Materials Express 3(12) 2022-2027, 2013. http://dx.doi.org/10.1364/OME.3.002022