• Ph D, Queen's University, 2009
• BS, Honours Astrophysics, Saint Mary's University, 2001

• Sanford Underground Research Facility Radioactivity User, Sanford Underground Research Facility
• Sanford Underground Research Facility Science Guide, Sanford Underground Research Facility

• nEXO R&D, Department of Energy. Grant Role: Principal. (2019 - 2019)
• Attend 2019 National NSF EPSCoR Conference, NSF. Grant Role: Principal. (2019 - 2019)
• A&S Travel Grant Program, College of Arts & Sciences. Grant Role: Principal. (2019 - Present)
• RII Track-4: Liquid Xenon Time Projection Chamber R&D on the Large Xenon Test Stand at LLNL, NSF. Grant Role: Principal. (2018 - 2020)
• Liquid Xenon Technology for the Tonne-Scale Neutrinoless Double Beta Decay Experiment, Department of Energy. Grant Role: Supporting. (2017 - 2020)

Citations listed below are presented in a standardized, modified format for display purposes only. They do not necessarily reflect the preferred style and conventions of the faculty member or discipline.

• Anton, G., et al., and MacLellan, Ryan. Search for Neutrinoless Double-Beta Decay with the Complete EXO-200 Dataset. Phys. Rev. Lett., 2019. (DOI: 10.1103/PhysRevLett.123.161802)
• Li, Z., et al., and MacLellan, Ryan. Simulation of charge readout with segmented tiles in nEXO. JINST, 2019. (DOI: 10.1088/1748-0221/14/09/P09020)
• Gallina, G., et al., and MacLellan, Ryan. Characterization of the Hamamatsu VUV4 MPPCs for nEXO. NIM, 2019. (DOI: 10.1016/j.nima.2019.05.096)
• Aharmim, B., et al., and MacLellan, Ryan. Measurement of neutron production in atmospheric neutrino interactions at the Sudbury Neutrino Observatory. Phys. Rev. D, 2019. (DOI: 10.1103/PhysRevD.99.112007)
• Chambers, C., et al., and MacLellan, Ryan. Imaging individual Ba atoms in solid xenon for barium tagging in nEXO. Nature, 2019. (DOI: 10.1038/s41586-019-1169-4)
• Tsang, R.H.M., et al., and MacLellan, Ryan. GEANT4 models of HPGe detectors for radioassay. NIM, 2019. (DOI: 10.1016/j.nima.2019.04.085)
• Aharmim, B., et al., and MacLellan, Ryan. Constraints on neutrino lifetime from the Sudbury Neutrino Observatory. Phys. Rev. D, 2019. (DOI: 10.1103/PhysRevD.99.032013)
• Aharmim, B, et al., and MacLellan, Ryan. Tests of Lorentz invariance at the Sudbury Neutrino Observatory. Phys. Rev. D, 2018. (DOI: 10.1103/PhysRevD.98.112013)
• Jamil, A., et al., and MacLellan, Ryan. VUV-sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO. IEEE Transactions on Nuclear Science, 2018. (DOI: 10.1109/TNS.2018.2875668)
• Sun, X. L., et al., and MacLellan, Ryan. Study of Silicon Photomultiplier Performance in External Electric Fields, T09006. Vol. 13. JINST, 2018. (DOI: 10.1088/1748-0221/13/09/T09006)
• Delaquis, S., et al., and MacLellan, Ryan. Deep Neural Networks for Energy and Position Reconstruction in EXO-200, P08023. Vol. 13. JINST, 2018. (DOI: 10.1088/1748-0221/13/08/P08023)
• Albert, J. B., et al., and MacLellan, Ryan. Sensitivity and Discovery Potential of nEXO to Neutrinoless Double Beta Decay, 065503. Vol. 97. Phys Rev C, 2018. (DOI: 10.1103/PhysRevC.97.065503)
• Al Kharusi, S., et al., and MacLellan, Ryan. nEXO Pre-Conceptual Design Report, 182..
• Albert, J B., et al., and MacLellan, Ryan. Search for nucleon decays with EXO-200, 072007. Vol. 97. Phys Rev D, 2018. (DOI: 10.1103/PhysRevD.97.072007)
• Albert, J. B., et al., and MacLellan, Ryan. Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector, 072701. Vol. 120. Phys Rev Lett, 2018. (DOI: 10.1103/PhysRevLett.120.072701)
• Jewell, M., et al., and MacLellan, Ryan. Characterization of an Ionization Readout Tile for nEXO. Vol. 13. JINST, 2018. (DOI: 10.1088/1748-0221/13/01/P01006 )
• Albert, J. B., et al., and MacLellan, Ryan. Searches for Double Beta Decay of Xe-134 with EXO-200, 092001. Vol. 96. Phys Rev D, 2017. (DOI: 10.1103/PhysRevD.96.092001 )
• Leonard, D. S., et al., and MacLellan, Ryan. Trace radioactive impurities in final construction materials for EXO-200, 169--179. Vol. A871. NIM A, 2017. (DOI: 10.1016/j.nima.2017.04.049)
• Mount, B. J., et al., and MacLellan, Ryan. Black Hills State University Underground Campus, 130--133. Vol. 126. Appl. Radiat. Isot., 2017. (DOI: 10.1016/j.apradiso.2017.02.025)
• Abi, B., et al., and MacLellan, Ryan. The Single-Phase ProtoDUNE Technical Design Report, 178..
• Albert, J. B., et al., and MacLellan, Ryan. Measurement of the drift velocity and transverse diffusion of electrons in liquid xenon with the EXO-200 detector, 025502. Vol. C95. Phys Rev C, 2017. (DOI: 10.1103/PhysRevC.95.025502)
• MacLellan, Ryan. An optimal energy estimator to reduce correlated noise for the EXO-200 light readout. In JINST, P07015. Vol. 11. JINST, 2016. (DOI: 10.1088/1748-0221/11/07/P07015)
• MacLellan, Ryan. Cosmogenic Backgrounds to neutrinoless double-beta decay in EXO-200. In Journal of Cosmology and Astroparticle Physics 2016, 029. Vol. 2016. Journal of Cosmology and Astroparticle Physics, 2016. (DOI: 10.1088/1475-7516/2016/04/029)
• MacLellan, Ryan. First Search for Lorentz and CPT Violation in Double Beta Decay with EXO-200. In Phys Rev D93, 072001. Vol. D93. Phys Rev D, 2016. (DOI: 10.1103/PhysRevD.93.072001)
• MacLellan, Ryan. Search for two neutrino double-beta decay of Xe-136 to the 0_1^+ excited state of Ba-136 with EXO-200. In Phys Rev C93, 035501. Vol. C93. Phys Rev C, 2016. (DOI: 10.1103/PhysRevC.93.035501)
• MacLellan, Ryan. Measurements of the ion fraction and mobility of alpha- and beta-decay products in liquid xenon using the EXO-200 detector. In Phys Rev C, 045504. Vol. 92. Phys Rev C, 2015. (DOI: 10.1103/PhysRevC.92.045504)
• MacLellan, Ryan. Investigation of radioactivity-induced backgrounds in EXO-200. In Phys Rev C92. Vol. C92. Phys Rev C, 2015. (DOI: 10.1103/PhysRevC.92.015503)
• MacLellan, Ryan. An RF-only ion-funnel for extraction from high-pressure gases. In Int J Mass Spectrometry 379, 110-120. Vol. 379. Int J Mass Spectrometry, 2015. (DOI: 10.1016/j.ijms.2015.01.003)
• MacLellan, Ryan. Spectroscopy of Ba and Ba+ deposits in solid xenon for barium tagging in nEXO. In Phys Rev A91. Vol. A91. Phys Rev A, 2015. (DOI: 10.1103/PhysRevA.91.022505)
• MacLellan, Ryan. Search for Majoron-emitting modes of double-beta decay of Xe-136 with EXO-200. In Phys Rev D90, 092004. Vol. D90. Phys Rev D, 2014. (DOI: 10.1103/PhysRevD.90.092004)
• MacLellan, Ryan. An apparatus to manipulate and identify individual Ba ions from bulk liquid Xe. In Rev. Sci. Instrum., 095114. Vol. 85. Rev. Sci. Instrum., 2014. (DOI: 10.1063/1.4895646)

• 2016 Fundamental Physics Prize, Fundamental Physics Prize Foundation, 2016

• MacLellan, Ryan. The nEXO Background Control Program. Presented at the Conference on Science at SURF, South Dakota School of Mines and Technology. (May 14, 2019)
• MacLellan, Ryan. nEXO: a tonne-scale next-generation double-beta decay experiment. Presented at the 2018 CAP Congress, Halifax, Nova Scotia Canada. (June 12, 2018)
• MacLellan, Ryan. The nEXO Radioassay Program. Presented at the 15th International Conference on Topics in Astroparticle and Underground Physics, Sudbury Ontario. (July 25, 2017)
• MacLellan, Ryan. nEXO: a tonne-scale next-generation double-beta decay experiment. Presented at the 15th International Conference on Topics in Astroparticle and Underground Physics, Sudbury Ontario. (July 24, 2017)
• MacLellan, Ryan. The nEXO Radioassay Program. Presented at the Conference on Science at SURF, South Dakota School of Mines and Technology. (May 16, 2017)
• MacLellan, Ryan. The next generation neutrinoless double-beta decay experiment nEXO. Presented at the APS April Meeting, Washington DC. (January 29, 2017)
• MacLellan, Ryan. Result from, and status of, EXO-200. Presented at the APS April Meeting, Salt Lake City. (April 18, 2016)
• MacLellan, Ryan. The next generation neutrinoless double-beta decay experiment nEXO. Presented at the APS April Meeting, Salt Lake City. (April 18, 2016)