Ph.D. Physical Chemistry, University of California at Berkeley 1996
B.S. Chemistry, Barrett Honors College, Arizona State University, Tempe 1990
Nerine Cherepy earned a Ph.D. in Physical Chemistry from the University of California, Berkeley. After postdoctoral work at the University of California, Santa Cruz, she joined Lawrence Livermore National Laboratory. Since 2005, she has worked on the development new light-emitting materials, including single crystals, transparent ceramics and plastics, for various uses in ionizing radiation detection, new imaging screens, lighting phosphors and laser gain media. These efforts involve device integration of new light-emitting materials for gamma spectroscopy, X-ray and neutron imaging, as well as lighting and laser applications. She has 17 awarded patents and more than 150 published papers. Materials development includes:
Bismuth-loaded plastic scintillator for gamma spectroscopy
High light yield plastic scintillators for MeV neutron imaging
GYGAG(Ce) – Gadolinium garnet transparent ceramics with R(662 keV)<4%; <100 ns principal decay
GLO(Eu) – Lutetium-based transparent ceramic for radiographic imaging and computed tomography
New phosphor materials for fluorescent and LED lighting – Nitrides, Oxynitrides, Fluorides and Oxides
Transparent ceramics fabricated via additive manufacturing for laser gain media
Cs2HfCl6 – Self-activated cubic Cesium Hafnium Chloride with high light yield and low hygroscopicity
Z. Seeley, T. Yee, N. Cherepy, A. Drobshoff, O. Herrera, R. Ryerson, S.A. Payne, “3d printed transparent ceramic YAG laser rods: Matching the core-clad refractive index,” Optical Materials 107 (2020) 110121.
S. O'Neal, N. Cherepy, S. Hok, S. Payne, “Performance of High Stopping Power Bismuth-loaded Plastic Scintillators for Radiation Portal Monitors,” IEEE Trans. Nucl. Sci., (2020).
R.D. Sanner, N.J. Cherepy, H.P. Martinez, H.Q. Pham, V.G. Young Jr, “Phosphorescent heteroleptic iridium (III) cyclometallates: Improved syntheses of acetylacetonate complexes and quantum chemical studies of their excited state properties,” Polyhedron, 176, 114256 (2020).
C. Delzer, M. Zhuravleva, L. Stand, C. Melcher, N. Cherepy, S. Payne, R. Sanner, J.P. Hayward, “Observations regarding inclusions in the growth of Cs2HfCl6 single crystal scintillators,” J. Crystal Growth, 531, 125336 (2020).
R.D. Sanner, N.J. Cherepy, H.Q. Pham, V.G. Young Jr, “Highly efficient phosphorescence from cyclometallated iridium(III) compounds: Improved syntheses of picolinate complexes and quantum chemical studies of their electronic structures,” Inorganica Chimica Acta, 496, 119040 (2019).
E. Rowe, W.B. Goodwin, P. Bhattacharya, G. Cooper, N. Schley, M. Groza, N.J. Cherepy, S.A. Payne, A. Burger, “Preparation, structure and scintillation of cesium hafnium chloride bromide crystals,” J. Crystal Growth, 509, 124-128 (2019).
N.J. Cherepy, S. Hok, S.P. O'Neal, H.P. Martinez, P.R. Beck, R.D. Sanner, O.B. Drury, E.L. Swanberg, S.A. Payne, C.R. Hurlbut, “Bismuth-loaded plastic scintillator portal monitors,” SPIE Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XX 10762, 107620B (2018).
R. A. Osborne, N. J. Cherepy, D. Åberg, F. Zhou, Z. M. Seeley, S. A. Payne, A. Drobshoff, H. Comanzo, A. Srivastava, “Ba(1-x)SrxMg3SiN4:Eu Narrowband Red Phosphor,” Opt. Mat., 84, 130-136 (2018).
W.C. Chuirazzi, I. Oksuz, P. Kandlakunta, T.N. Massey, C.R. Brune, N.J. Cherepy, H.P. Martinez, L.R. Cao, “Evaluation of Polyvinyl Toluene Scintillators for Fast Neutron Imaging,” J. Radioanal. Nucl. Chem., 318, 543-551 (2018).
E.L. Swanberg, N.J. Cherepy, P.R. Beck, Z.M. Seeley, B.M. Wihl, S.L. Hunter, S.E. Fisher, S.A. Payne, J. Kindem, “A Handheld Direction Indicating Gamma Spectrometer Using GYGAG(Ce) Scintillators on Si Photodiode Arrays,” IEEE Trans. Nucl. Sci. 65 (8), 2303-2309 (2018).
T.J. Hajagos, C. Liu, N.J. Cherepy, and Q. Pei, “High-Z Sensitized Plastic Scintillators: A Review,” Adv. Mater., 30, 1706956 (2018).
N.J. Cherepy, Z.M. Seeley, S.A. Payne, E.L. Swanberg, P.R. Beck, D.J. Schneberk, G. Stone, B.M. Wihl, S.E. Fisher, S.L. Hunter, P.A. Thelin, T. Stefanik, J. Kindem, “Transparent Ceramic Scintillators for Gamma Spectroscopy and Imaging,” IEEE Nuc. Sci. Symp. Conf. Rec. 2017, (2018).
NJ Cherepy, HP Martinez, RD Sanner, PR Beck, OB Drury, EL Swanberg, SA Payne, CR Hurlbut, B Morris, “New Plastic Scintillators for Gamma Spectroscopy, Neutron Detection and Imaging,” IEEE Nuc. Sci. Symp. Conf. Rec. 2017, (2018).
N.J. Cherepy, P.R. Beck, S.A. Payne, E.L. Swanberg, B.M. Wihl, S.E. Fisher, S. Hunter, P.A. Thelin, C.J. Delzer, S. Shahbazi, A. Burger, K.S. Shah, R. Hawrami, L.A. Boatner, M. Momayezi, K. Stevens, M.H. Randles, D. Solodovnikov, “History and Current Status of Strontium Iodide Scintillators,” SPIE Optical Engineering+ Applications, OP17O-OP318-47 (2017).
J. Xu, N.J. Cherepy, J. Ueda, S. Tanabe, “Red persistent luminescence in rare earth-free AlN: Mn2+ phosphor,” Materials Letters 206, 175-177 (2017).
A. Burger, E. Rowe, M. Groza, K.M. Figueroa, N.J. Cherepy, P.R. Beck, S. Hunter, S.A. Payne “Cesium hafnium chloride: A high light yield, non-hygroscopic cubic crystal scintillator for gamma spectroscopy,” App. Phys. Lett. 107 (14), 143505 (2015).
N.J. Cherepy, Z.M. Seeley, S.A. Payne, E.L. Swanberg, P.R. Beck, D.J. Schneberk, G. Stone, R. Perry, B. Wihl, S.E. Fisher, S.L. Hunter, P.A. Thelin, R.R. Thompson, N.M. Harvey, T. Stefanik, J. Kindem, “Transparent Ceramic Scintillators for Gamma Spectroscopy and MeV Imaging,” SPIE Optical Engineering+ Applications, 95930P-95930P-7 (2015).
P.R. Beck, S.A. Payne, S. Hunter, L. Ahle, N.J. Cherepy, E.L. Swanberg, “Nonproportionality of Scintillator Detectors. V. Comparing the Gamma and Electron Response,” IEEE Trans. Nucl. Sci., 62, 1429 – 1436 (2015).
N.J. Cherepy, R.D. Sanner, P.R. Beck, E.L. Swanberg, T.M. Tillotson, S.A. Payne and C.R. Hurlbut, “Bismuth- and Lithium-Loaded Plastic Scintillators for Gamma and Neutron Detection,” Nucl. Instr. Methods Phys. A, 778, 126-132 (2015).
Q Chen, W Cai, T Hajagos, D Kishpaugh, C Liu, N Cherepy, A Dooraghi, A. Chatziioannou, S. Payne, Q. Pei, “Bulk-Size Transparent Gadolinium Oxide-Polymer Nanocomposites for Gamma Ray Scintillation,” Nanotech, 295-296, (2014).
S.A. Payne, S. Hunter, L. Ahle, N.J. Cherepy, E. Swanberg, “Nonproportionality of Scintillator Detectors. III. Temperature Dependence Studies,” IEEE Trans. Nucl. Sci., 61, 2771 – 2777 (2014).
N.J. Cherepy, Z.M. Seeley, S.A. Payne, P.R. Beck, O.B. Drury, S.P. O'Neal, K. Morales Figueroa, S. Hunter, L Ahle, P.A. Thelin, T. Stefanik, J. Kindem, “Development of Transparent Ceramic Ce-Doped Gadolinium Garnet Gamma Spectrometers,” IEEE Trans. Nucl. Sci., 60, 3, 2330 (2013).
Z Seeley, N Cherepy, S Payne, Two-step sintering of Gd0.3Lu1.6Eu0.1O3 transparent ceramic scintillator,” Opt. Mater. Express 3 (7), 908-912 (2013).
N.J. Cherepy, S.A. Payne, B.W. Sturm, O.B. Drury, S.P. O’Neal, P.A. Thelin, K.S. Shah, R. Hawrami, M. Momayezi, B. Hurst, A. Burger, B. Wiggins, P. Bhattacharya, L.A. Boatner, J.O. Ramey, “Instrument Development and Gamma Spectroscopy with Strontium Iodide,” IEEE Trans. Nucl. Sci., 60 (2), 955 (2013).
E. Rowe, P. Bhattacharya, E. Tupitsyn, M. Groza, A. Burger, N.J. Cherepy, S.A. Payne, B.W. Sturm, C. Pédrini “A New Lanthanide Activator for Iodide Based Scintillators: Yb2+,” IEEE Trans. Nucl. Sci., 60 (2), 1057 (2013).
Z.M. Seeley, N.J. Cherepy, S.A. Payne, “Homogeneity of Gd-Based Garnet Transparent Ceramic Scintillators for Gamma Spectroscopy,” J. Crystal Growth, 379, 79-83 (2013).
R. Hawrami, J. Glodo, K. S. Shah, N. Cherepy, S. Payne, A. Burger, L. Boatner, “Bridgman Bulk Growth and Scintillation Measurements of SrI2:Eu, J. Crystal Growth, 379, 69-72 (2013).
L. A. Boatner, J. O. Ramey, J. A. Kolopus, R. Hawrami, W. M. Higgins, E. van Loef, J. Glodo, K. S. Shah, P. Bhattacharya, E. Tupitsyn, M. Groza, A. Burger N. J. Cherepy and S. A Payne, “Bridgman Growth of Large SrI2:Eu2+ Single Crystals: A High-performance Scintillator for Radiation Detection Applications,” J. Crystal Growth, 379, 63-68 (2013).
Seeley, ZM, Dai, ZR, Kuntz, JD, Cherepy, NJ, Payne, SA “Phase Stabilization in Transparent Lu2O3:Eu Ceramics by Lattice Expansion,” Optical Materials, 35 (1), 74 (2012).
T Martin, P-A Douissard, Z Seeley, N Cherepy, S Payne, E Mathieu, and J Schuladen, “New High Stopping Power Thin Scintillators Based on Lu2O3 and Lu3Ga5-xInxO12 for High Resolution X-ray Imaging,” IEEE Trans. Nucl. Sci., 59, (5), 2269 (2012).
J WT Heemskerk, R Kreuger, MC Goorden, MAN Korevaar, S Salvador, ZM Seeley, NJ Cherepy, E van der Kolk, SA Payne, P Dorenbos, FJ Beekman, “Experimental comparison of high-density scintillators for EMCCD-based gamma ray imaging,” Phys. Med. Biol. 57, 4545 (2012).
Zaitseva, N, Rupert, BL, Pawelczak, I, Glenn, A, Martinez, HP, Carman, L, Faust, M, Cherepy, N, Payne, S “Plastic scintillators with efficient neutron/gamma pulse shape discrimination,” Nucl. Instr. Meth. A, 668, 88-93 (2012).
N. J. Cherepy, B. W. Sturm, O. B. Drury; T. A. Hurst. S. A. Sheets, L. E. Ahle, C. K. Saw, M. A. Pearson, S. A. Payne, A. Burger, L. A. Boatner, J. O. Ramey, E. V. van Loef, J. Glodo, R. Hawrami, W. M. Higgins, K. S. Shah, W. W. Moses, “SrI2 scintillator for gamma ray spectroscopy ,” Proc. SPIE, 7449, 7449-0 (2009).
N.J. Cherepy, S.A. Payne, S.J. Asztalos, G. Hull, J.D. Kuntz, T. Niedermayr, S. Pimputkar, J.J. Roberts, R.D. Sanner, T.M. Tillotson, E. van Loef, C.M. Wilson, K.S. Shah, U.N. Roy, R. Hawrami, A. Burger, L.A. Boatner, W.-S. Choong, “Scintillators with Potential to Supersede Lanthanum Bromide,” IEEE Trans. Nucl. Sci., 56, 873-880 (2009).
N.J. Cherepy, G. Hull, A. Drobshoff, S.A. Payne, E. van Loef, C. Wilson, K. Shah, U.N. Roy, A. Burger, L.A. Boatner, W-S Choong, W.W. Moses “Strontium and Barium Iodide High Light Yield Scintillators,” Appl. Phys. Lett. 92, 083508 (2008).