Consortium for Monitoring, Technology, and Verification Newsletter, 2020

PROF. SARA A. POZZI Director, Consortium for Monitoring, Technology, and Verification MTV.engin.umich.edu

MTV Workshop Attendees, March 10, 2020, Ann Arbor,

NNSA Administrator Visit , , January 14, 2020 University of Hawaii team at the MTV Workshop, March 11, 2020

MTV Nuclear Engineering Summer School, Virtual Lecture Student Presentation Awards at the MTV Workshop, March 11, 2020 MTV Leadership

MTV Motivation and Mission • Preventing the spread of nuclear weapons and related technology is paramount to our national security • Timely detection of nuclear proliferation requires a deep understanding of the associated signatures and technology to detect them • The MTV’s mission is to develop new technologies that detect and deter nuclear proliferation activities and to train the next generation of nuclear professionals

Executive Leadership External Advisory Board

Prof. Sara Pozzi Dr. Mona Dreicer Director Lawrence Livermore University of Michigan National Laboratory

Prof. David Wehe Dr. Richard Kouzes Chief Scientist Pacific Northwest University of Michigan National Laboratory

Prof. Igor Jovanovic Dr. Nancy Jo Nicholas Assoc. Dir. for Natl. Labs Los Alamos University of Michigan National Laboratory

Dr. Shaun Clarke Dr. Vladimir Protopopescu Associate Director Oak Ridge University of Michigan National Laboratory THRUST AREASTHRUST

Mr. John Rodriquez Project Manager Dr. James Tiedje Michigan State University University of Michigan

MTV NEWSLETTER, 2020 2 University Partners National Laboratory Partners

THRUST AREA 1 THRUST AREA 2 THRUST AREA 3 FUNDAMENTALS OF SIGNALS AND NUCLEAR NUCLEAR SOURCE TERMS FOR EXPLOSION AND PARTICLE PHYSICS NUCLEAR NONPROLIFERATION MONITORING

Prof. Igor Jovanovic Prof. Steven Biegalski Dr. Milton Garces Thrust Area 1 Lead Thrust Area 2 Lead Thrust Area 3 Lead University of Michigan Institute of Technology University of Hawaii Reaction Theory and Modeling Isotopic Science Nuclear Fuel Cycle Infrasound Radiation Background S. Pozzi, U Michigan S. Biegalski, Ga Tech. Process Modeling M. Garces, Hawaii Monitoring C. Perfetti, New Mexico A. Danagoulian, MIT P. Wilson, K. Kearfott, U Michigan M. Flaska, Penn St. U S. Chirayath, TAMU Seismology Novel Imaging Techniques A. Glaser, Princeton G. Ekstrom, Columbia Environmental Fate Z. He, U Michigan Spatial/Temporal P. Richards, Columbia and Transport D. Wehe, U Michigan Spectroscopic Analysis Radiation Transport W-Y. Kim, Columbia of Radionuclides A. Hecht, New Mexico I. Jovanovic, U Michigan B. Kiedrowski, U Michigan A. Enqvist, A Prinja, UNM Methodologies for Antineutrino-Based Methods In Situ Natural Wide Area Radionuclide A. Erickson, Ga Tech Monitoring (biota) Environmental Sampling S. Pozzi, U Michigan P. Huber, Va Tech. T. Hazen, UTK K. Hartig, Florida J. Learned, Hawaii E. Alm, MIT I. Jovanovic, U Michigan A. Arkin, Berkeley H. Dulai, Hawaii THRUST AREASTHRUST CROSS CUTTING THRUSTS MODELING AND SIMULATION NUCLEAR POLICY EDUCATION AND OUTREACH Prof. Brian Kiedrowski Prof. Paul Wilson Prof. Kimberlee Kearfott University of Michigan University of Wisconsin University of Michigan

MTV NEWSLETTER, 2020 3 Awards & Accomplishments Professor Göran Ekström Elected to National Academy of Sciences Lamont-Doherty Earth Observatory seismologist Göran Ekström has been elected to the National Academy of Sciences, one of the highest honors accorded to scientists in the United States.

Ekström’s work spans many facets of global earthquake seismology, from the nature of individual earthquakes and other seismic sources to the large-scale structure of the Earth. He joined Columbia University’s Department of Earth and Environmental Scien- ces as a professor in 2006.

Ekström leads the Global Centroid Moment Tensor Project (CMT) at Lamont. The goal of that project is to integrate seismic data rapidly from every large earthquake and determine its source characteristics.

Göran Ekström Full release: https://www.ldeo.columbia.edu/news-events/seismologist-g%C3%- (photo credit: ldeo.columbia.edu) B6ran-ekstr%C3%B6m-elected-national-academy-sciences

MIT Professor Areg Danagoulian and Colleagues Voted 2019 Arms Control Persons of the Year Professor Areg Danagoulian and colleagues at the Institute of Technology (MIT) were selected as the 2019 Arms Control Persons of the Year through an online poll that drew participants from over 100 countries. The annual contest is organized by the independent, nongovernmental Arms Control Association.

Full release: https:// www.armscontrol.org/ pressroom/2020-01/mit-professor- areg-danagoulian-colleagues-voted- 2019-arms-control-persons-year

Prof. Areg Danagoulian (first row, 2nd from the left) and colleagues at MIT developed an innovative new nuclear disarmament verification process using neutron beams. (photo credit: armscontrol.org)

MTV NEWSLETTER, 2020 4 AWARDSRecognitions and awards have been given to faculty and students for outstanding performance over the first year of the Consortium for Monitoring, Technology, and Verification

Professor Sara A. Pozzi named IEEE Fellow

Professor Sara A. Pozzi has been named a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) effective January 1, 2020. She is being recognized for contributions to neutron detection techniques and neutron transport Monte Carlo methods.

The IEEE Fellow is one of the most prestigious honors of the IEEE, and is bestowed upon a very limited number of Senior Members who have contributed importantly to the advancement or application of engineering, science and technology bringing significant value to our society. The number of IEEE Fellows elevated in a year is no more than one-tenth of one percent of the total IEEE voting membership. Prof. Sara Pozzi demonstrates where nuclear materials are placed within the well counter To learn more about IEEE or the IEEE Fellow system developed by her research team at the University of Michigan Program, please visit www.ieee.org.

Prof. Igor Jovanovic named to the Optical Society 2020 Fellows Class

Prof. Jovanovic is recognized for pioneering contributions to ultrafast parametric sources and intense laser science and technology, and innovative applications of ultrafast lasers to plasma spectroscopy and remote sensing in nuclear security.

From the OSA site: The Optical Society (OSA) Board of Directors has elected 94 members to the society’s 2020 Fellows Class. Fellows are selected based on several factors, including contributions to education, research, engineering, business and the community.

“Being named an OSA Fellow is a singular honor and indicates a history of achievement in optics and photonics, and a reputation for service to OSA and our field,” said OSA President Ursula Gibson. “Congratulations to the 2020 Fellows Class, and our thanks to the OSA Fellow Members Committee, nominators and references for their continued support of this program.”

Igor Jovanovic OSA Fellows are members who have served with distinction in the advancement of optics and photonics. The OSA Fellow Members Committee, led by Aref Chowdhury, Nokia Corporation, U.S.A., reviewed more than 200 nominations submitted by current OSA Fellows and recommended candidates for election to the Awards Council and OSA Board of Directors.

Full release: https://news.engin.umich.edu/2019/11/professor-jovanovic-named-fellow-of- the-optical-society/

MTV NEWSLETTER, 2020 5 ACCOMPLISHMENTSAwards & Accomplishments MTV Awards Four Fellowships in Applied Antineutrino Physics

Connor Awe Kristofer Ogren Edward Callaghan Tyler Johnson Ph.D. Student Ph.D. Student Ph.D. Student Ph.D. Student Duke University University of Michigan UC Berkeley Duke University

Advisor: Prof. Phillip Barbeau Advisor: Prof. Igor Jovanovic Advisor: Advisor: Prof. Phillip Barbeau Prof. Gabriel Orebi Gann Research statement: My research Research statement: I propose Research statement: My research is focused on novel neutrino a project that is integral Research statement: My research centers around kinematic detectors and their applications. In to the foundation for this interests are generally in the field reconstruction of the originating particular, I study ways to perform transformational nonproliferation of neutrino physics. One emergent direction of the neutrino using neutrino directional reconstruction technology– specifically, I will technology for future detectors inverse beta decay products; a as a means of backgrounds develop, construct, and test is water-based liquid scintillator principle we coined as “neutrino rejection. I am also a member deployable prototypes of the (WbLS), the promise of which is telescopy.” For my graduate of the COHERENT collaboration, critical components of the to achieve higher light yields and research, I will develop a small- where my primary contribution proposed WATCHMAN calibration a lower energy threshold than scale time projection chamber has been measurements of system. My work focuses on conventional Cherenkov detectors, neutrino detector capable of nuclear quenching factors. designing and demonstrating two while still retaining usable extracting neutrino directionality specific radionuclide calibration directional information. by reconstructing inverse beta sources that have already been decay products with machine identified as promising and learning. high priority by the Calibrations Working Group.

Ethan Klein Ph.D. Student Massachusetts Institute of Technology (photo: 2nd from right)

Ethan Klein was invited to give a talk at the “74 Years of Nuclear Disarmament and the Contribution of Youth beyond 2020” event at the United Nations Headquarters in . Ethan’s talk, titled “Neutrons for Nuclear Disarmament”, was attended by Ms. Izumi Nakamitsu, U.N. Under- Secretary-General and High Representative for Disarmament Affairs, and H.E. Mr. Cho Hyun, Permanent Representative of the Republic of Korea to the United Nations. January 24, 2020

Link: https://www.un.org/disarmament/update/74-years-of-nuclear-disarmament-contribution-of-youth-beyond-2020/

MTV NEWSLETTER, 2020 6 ACCOMPLISHMENTSRecognitions and awards have been given to faculty and students for outstanding performace over the first year of the Consortium for Monitoring, Technology, and Verification University of Michigan welcomes Ms. Lisa Gordon-Hagerty

MTV faculty and students welcome Ms. Lisa Gordon-Hagerty, Under Secretary for Nuclear Security of the U.S. Department of Energy (DOE) and Administrator of the National Nuclear Security Administration (4th from right). University of Michigan January 14, 2020.

Prof. Sara Pozzi University of Michigan

Professor Sara Pozzi receives an Immediate Recognition coin given by NNSA Administrator, Ms. Lisa Gordon-Hagerty on January 14. 2020.

These coins are given to honor, recognize, and award exceptional achievements or performance.

MTV NEWSLETTER, 2020 7 Awards & ACCOMPLISHMENTS Accomplishments MTV Annual Workshop, March 9 - 11, 2020 The Consortium for Monitoring, Technology, and Verification (MTV) held a successful annual workshop,March 9 – 11, 2020 at the University of Michigan.

This year’s workshop welcomed 102 participants in person (85) and online (17). The audience included faculty (24) and students (50) from MTV universities as well as national laboratory affiliates (26) and government officials (2).

On March 9, the workshop began with a welcome dinner at the University of Michigan Museum of Art (UMMA). We welcomed keynote speaker Megan Slinkard (photo: top-right), Head of Software Integration at the International Data Centre Division of the Preparatory Commission for the Comprehensive Nuclear-Test- Ban Treaty Organization, who discussed the topic “Verification of the CTBT”.

The workshop continued on March 10 and March 11 with opening talks by Randy Bell, NNSA, and an MTV overview by Sara Pozzi, MTV Director. The events continued with technical talks (15) and posters (29), which provided overviews of research accomplishments over the first year of the MTV project. MTV students provided 36 of these presentations including 8 of the presented talks. Four students won best presentation awards (photos above):

• Kelly Traux, Ph.D. Student, University of Hawaii, Best Poster (photo: middle) • William Steinberger, Ph. D. Student, University of Michigan, Best Poster (photo: bottom-left) • Niral Shah, Ph. D. Student, University of Michigan, Best Oral (photo: bottom-middle) • Stefano Marin, Ph.D. Student University of Michigan, Best Oral (photo: bottom-right)

Visit our website to learn more about the workshop presentations. https://mtv.engin.umich.edu/mtv-workshop-2020/

Jordan Noey Masters Student Nathan Giha University of Michigan Ph.D. Student University of Michigan Awarded Health Physics Society Richard J Burk Fellowship, NSF Graduate Research May 14, 2020 Fellowship, March 2020 MTV NEWSLETTER, 2020 8 ACCOMPLISHMENTS AWARDS

Emily Kwapis Patrick O’Neal Noah Kleedtke Michael Hua Ph.D. Student Masters Student Ph.D. Student Ph.D. Student A&M University University of Michigan University of Michigan Master of Science in nuclear Awarded Science, Mathematics, Engineering Innovation Award, 2020 Rackham Graduate School engineering with a specialization and Research for Transformation Nov. 8, 2019 Outstanding Graduate Student in nuclear nonproliferation from (SMART) Scholarship-for-Service Instructor Award Texas A&M University. May 8, 2020 Program, April 6, 2020 Engineering Research Symposium 2020-2021 , at University of Michigan Patrick will be interning as part Ely M. Gelbard Graduate Scholarship Awarded Office of Nuclear Energy’s of the Academic Cooperation Integrated University Program Program at Lawrence Livermore 2019 Best Paper and resentation, (NEUP) Fellowship, April 14, 2020 National Laboratory. American Nuclear Society Winter Summer 2020 Meeting, Nuclear Criticality Safety Division Undergraduate Student Accomplishements

Long Kiu “Edgar” Chung (photo left) Undergraduate Student University of Michigan

Awarded 2020 Roy G. Post Foundation Scholarship, March 10, 2020

Nathan Piersma, University of Michigan, Chihiro Kikuchi Scholarship, April 1, 2020

Keegan Donovan Pombier, University of Michigan, Internship at Idaho National Laboratory, June 1, 2020

Rigoberto Vazquez Jr., Inducted into the Alpha Nu Sigma National , March 13, 2020

Tyler Lazarski, University of Michigan, Kearfott KJ. Radiation Weather Station Artificial Braden Saltus, Undergraduate student, University Intelligence Research”. University of Michigan Undergraduate Research Opportunities of Michigan, has developed a virtual model Program (UROP) Symposium, Ann Arbor, MI, April 15; 2020. (talk) [Won UM UROP Blue that allows the user to program virtual sources, Ribbon Award for Exemplary Research Poster/Presentation] detectors, and shielding for use in radiation detection simulation. Samantha Romano, Jordan Noey, Long Kiu Chung, Kearfott KJ. A Quantitative Comparison between Two Large Volume Gamma-Ray Spectrometer Mount The bronze sphere close to the user is a measuring Configurations”. University of Michigan Undergraduate Research Opportunities Program tool providing a reading in meters. The blue planes (UROP) Symposium, Ann Arbor, MI, April 15; 2020. (poster) [Won UM UROP Blue Ribbon are shielding. The red sphere is a point source, and Award for Exemplary Research Poster/Presentation. the brown object on the stand is a detector. MTV NEWSLETTER, 2020 9 ResearchRESEARCH Highlights HIGHLIGHTS

Neutrino Directional Detection with Inverse Beta Decay

• The CEnNS reaction is for neutrino detection, but produces very low energy nuclear recoils

Connor Awe • The Tandem Van de Graff accelerator at the Triangle Ph.D. Student Universities Nuclear Laboratory (TUNL) is being applied Duke University to scintillator quenching factor measurements

hist99_copy Entries 101 Mean 87.27

Std Dev 28.59 Time of flight measurements at the tandem with a zero- 35000 degree detector at two distances. Source: C. Awe et. al. “Liquid scintillator response to 30000 proton recoils in the 10–100 keV range”. PRC 98, 045802

25000

Counts / nS 20000

15000

10000

40 50 60 70 80 90 100 110 120 130 Coherent Elastic Neutrino–Nucleus Time of Flight [nS] Scattering (CEνNS) Reaction Quantifying Moss Response to Pollution from Exposure to Increasing Levels of Copper and Uranium using Laser Induced Photoluminescence

Kelly Traux Ph.D. Student University of Hawaii

• Laser-induced fluorescence (LIF) is used to observe biological changes in mosses exposed to metal • Measurements of treated and untreated moss samples clearly identify the area exposed to copper using the 532 and 355 nm lasers • This application will be expanded to detecting moss responses to radionuclide exposure and a corresponding quantification method

MTV NEWSLETTER, 2020 10 RESEARCH HIGHLIGHTS MTV research activities began September 2019 Laser-Based Spectroscopy for Rapid, Remote Detection of Uranium

Excitation and detection at 10 m

Lauren Finney Single shot detection probability: 52% U I and 40% UO Ph.D. Student 100% detection probability for U I at 35 laser shots (0.44 s) University of Michigan 100% detection of UO at 100 laser shots (1 s)

Small-Molecule Organic Glass Scintillators

• Organic scintillating material developed by Sandia National Laboratories • Cast, not grown • Brought production capability to our group

Nathan Giha • Application to radioxenon detection for nuclear explosion Ph.D. Student monitoring University of Michigan

MTV NEWSLETTER, 2020 11 “Overall terrific workshop. I learned a substantial amount of material that will definitely help with future research projects.” Education - MCNP/MCNPX PoliMi Workshop survey and Outreach MCNP/MCNPX-PoliMi Training Workshop Prof. Brian Kiedrowski (top) and Dr. Shaun Clarke MTV Launches a new website! (bottom) at the University of Michigan, Nuclear MTV.engin.umich.edu serves as a hub for sharing and Engineering and Radiological Sciences department, disseminating information about MTV research activities and served as instructors at the 2020 MCNP/MCNPX- accomplishments to the scientific community and to the public. PoliMi Training Workshop.

The website highlights the outstanding work being produced by This year’s 3-day virtual workshop, held from May 5 MTV faculty and students. You will also be able to read more details to May 7, 2020, welcomed 45 participants interested about the research teams by viewing student and faculty profiles. in learning and developing their skill with this Additionally, the website provides valuable information about unique code. upcoming and past events as well as other opportunities within the consortia. Course details and topics can be found online here: https://mtv.engin.umich.edu/mcnp-mcnpx-polimi-workshop-2020/ MTV Student Virtual Research Symposium Anil Prinja invited for the Monte and Usha Ahuja Distinguished Lecture Series Prof. Anil Prinja is invited as a guest lecturer for the Monte and Usha Ahuja Distinguished Lecture Series, State University, Feb. 14, 2020

Talk title: “Modeling Stochastic Neutron Populations with Branching Markov Process Theory” Anil Prinja University of New Mexico The 2020 MTV Student Virtual Research Symposium will feature 36 student presentations from June 9 to June 11, 2020. MTV students will 2020 National Laboratory Fellows provide research updates highlighting their accomplishments from over the past year. National Laboratory Fellows receive travel stipends allowing them to visit MTV Universities for the purpose of developing relationships with faculty We are excited to have these students represent our consortia to an and students audience of researchers and scholars from the national laboratories and NNSA leadership. Awarded Fellow University Collaborator Jonathan Burnett, PNNL...... Steven Biegalski, Ga. Tech https://mtv.engin.umich.edu/student-virtual-research-symposium/ Rebecca Detwiler, PNNL...... Andreas Enqvist, Univ. Florida Sivanandan Harilal, PNNL...... Igor Jovanovic, Univ. of Michigan National Lab Collaborations Jesson Hutchinson, LANL...... Sara Pozzi, Univ. of Michigan Students and faculty visit Jeffrey Katalenich, PNNL...... Marek Flaska, Penn State Univ. national laboratories for Wendy Kuhne, SRNL...... Henrietta Dulai, Univ. of Hawaii collaboration efforts and Patrick Talou, LANL...... Sara Pozzi, Univ. of Michigan research experiments. Glenn Warren, PNNL...... Areg Danagoulian, MIT Jennifer Webster, PNNL...... Sunil Chirayath, TAMU Professor Pozzi and her students Cleat Zeller, NNSS...... Goran Ekstrom, Columbia (photo right) performed Milton Garces. Univ. of Hawaii correlated fission experiments at Sunil Chirayath, TAMU Oak Ridge National Laboratory in collaboration with Paul Hausladen. MTV NEWSLETTER, 2020 12 “The MTV Summer School allows me to see my individual work in the greater scheme of things by providing a strong foundation of theoretical nuclear engineering and physics.” - Isabel Hernandez, University of Michigan, Undergraduate Student

MTV Nuclear Engineering Summer School!

12 45 11 224 Weeks Lectures Guests Students

Virtual Courses Classes are taught virtually by MTV faculty, national lab collaborators, and May 18 - July 31, 2020 senior PhD students.

Host Lecturers Lectures are designed to benefit students interested in strengthening their research capabilities. This 12-week program covers a range of topics and techniques that benefit student Prof. Sara Pozzi Dr. Shaun Clarke researchers at all academic levels. U. Michigan U. Michigan William Steinberger Course details and topics can be found online here: Dr. Cameron Miller Ph.D. Student https://mtv.engin.umich.edu/mtv-nuclear-engineering-summer- U. Michigan U. Michigan school-2020/ Michael Hua Nathan Giha Ph.D. Student Ph.D. Student U. Michigan U. Michigan Course topics include: Noora Ba Sunbul Abbas Jinia • Nuclear Engineering Background Ph.D. Student Ph.D. Student U. Michigan U. Michigan • Gamma Detection • Neutron Detection Stefano Marin Christopher Meert Ph.D. Student Ph.D. Student • Organic Scintillation Detectors U. Michigan U. Michigan • Analyzing Experimental Data (Including special nuclear material!) Guest Lecturers • Dr. Jorgen Randrup, Lawrence Berkeley National Laboratory • Dr. Alan Carr, Los Alamos National Laboratory • Prof. Igor Jovanovic, University of Michigan • Prof. Alexander Glaser, Princeton University • Prof. Christopher Perfetti, University of New Mexico, • Dr. Alexis Trahan, Los Alamos National Laboratory • Mr. Jesson Hutchinson, Los Alamos Naitional Laboratory • Prof. Angela Di Fulvio, University of at Urbana-Champaign • Prof. Anna Erickson, Georgia Institute of Technology • Dr. Erik Brubaker, Sandia National Laboratories • Dr. Ramona Vogt, Lawrence Livermore National Laboratory

MTV NEWSLETTER, 2020 13 Student 132 Engagement Students

132 Students Engaged in MTV Research Activities MTV Fellows Graduate Students...... 27 Graduate Students, 76 27 49 Undergraduate Students.....12

MTV Associates Undergraduate Students, 56 12 44 Graduate Students...... 49 Undergraduate Students.....44 0 20 40 60 80 Fellow Associate Student Advancement Model

2019, MTV associate Technical/Program Analyst, DHS CWMD 2014, Begins PhD

Cameron 2016, LBNL Miller internship, BELLA Center

2013, Begins UM Graduate program 2019, PhD Defense For Nuclear Engineering

2014, CVT associate

2013, U. Michigan, B.S. 2014, U. Michigan, SUGS Nuclear Engineering & MSE, Nuclear Engineering & Radiological Sciences Radiological Sciences

MTV NEWSLETTER, 2020 14 National Laboratory Engagement “Nuclear Safeguards” class at Oak Ridge National Laboratory & Y-12

“Nuclear Safeguards” class on campus at Oak Ridge National Laboratory, October 2019

“Nuclear Safeguards”, Instructor: Prof. Sara Pozzi, 25 students, University of Michigan Students are introduced to the history of nuclear-material safeguards, nuclear-safeguard techniques, international safeguards policy, and currently used neutron and gamma-ray measurement systems and techniques. Students attend weekly lectures to prepare for a week-long training offered at the Safeguards Laboratory (SL) at Oak Ridge National Laboratory (ORNL).

MTV universities regularly host seminars welcoming experts from national laboratories to discuss research opportunities at the national labs and build relationships with faculty and students.

Above: Dr. Alexis Trahan, LANL, discusses opportunities at LANL with students at the University of Michigan, Oct. 3, 2019.

Right: Dr. Marc Paff, LANL, gives a presentation to students at the University of Michigan, Oct 20, 2019.

MTV NEWSLETTER, 2020 15 Peer Reviewed Publications reported from Sept. 1, 2019 to March 30, 2020 MTV Publications 1. A. Bernstein, N. Bowden, B. L. Goldblum, P. Huber, I. Jovanovic, and J. Mattingly, “Colloquium: Neutrino Detectors as Tools for Nuclear Security”, Reviews of Modern Physics, 92, 011003 (2020). DOI: https://doi.org/10.1103/RevModPhys.92.011003 2. Ezra M. Engel, Ethan A. Klein, A. Danagoulian, “Feasibility study of a compact Neutron Resonance Transmission Analysis instrument,” AIP Advances 10, 015051 (2020). DOI: https://doi.org/10.1063/1.5129961 3. Areg Danagoulian, “Verification of Arms Control Treaties with Resonance Phenomena ,” Nuclear Physics News (2020) invited review article, in press. DOI: https://doi.org/10.1080/10619127.2020.1717271 4. Rafique M, Tareen ADK, Mir AA, Nadeem MSA, Asim KM, Kearfott, KJ. Delegated regressor, a robust approach for automated anomaly detection in the soil radon time series data, Scientific Reports, 10: article 3004, 1-11 (open access), accepted January 27, 2020 DOI: https://doi.org/10.1038/s41598-020-59881-9 5. Champion RJ, Golduber RM, Kearfott KJ, " Use of an Imaging Spectrometer for Characterization of a Cesium Dosimeter Calibration Facility", Health Phys,118(4):462-469, 2020. DOI: 10.1097/HP.0000000000001150 6. Seekamp JM, Noey JD, Kwapis EH, Chung LK, Shubayr NA, Smith T, Trimas DJ, Kearfott KJ, "Design and Characterization of an Extremely Sensitive, Large Volume Gamma Ray Spectrometer for Environmental Samples", Health Phys, submitted June 20, 2019, accepted January 7, 2020. (Winner 2019 Department of Energy Innovations in Nuclear Technology R&D Award) DOI: 10.1097/HP.0000000000001271 7. Noah McFerran, Bonnie Canion, Benjamin McDonald, Jonathan Kulisek, Jonathan Dreyer, Simon Labov, Andreas Enqvist, “Gamma-ray spectrum variations for surface measurements of uranium hexafluoride cylinders”, Nuclear Instruments and Methods A, Vol. 961, p. 163675, 2020, DOI: https://doi.org/10.1016/j. nima.2020.163675 8. S. Marin, V. A. Protopopescu, R. Vogt, M. J. Marcath, S. Okar, M. Y. Hua, P. Talou, P. F. Schuster, S. D. Clarke, and S. A. Pozzi, “Event-by-Event Neutron-Photon Multiplicity Correlations in 252Cf(sf),” Nuclear Instruments and Methods A, Volume 968, 163907 - 2020. DOI: https://doi.org/10.1016/j.nima.2020.163907 9. Alexander Glaser and Moritz Kütt, “Verifying Deep Reductions in the Nuclear Arsenals: Development and Demonstration of a Motion-detection Subsystem for a “Buddy Tag” Using Non-export Controlled Accelerometers,” IEEE Sensors Journal, 2020. DOI: 10.1109/JSEN.2020.2978540 10. A. Haghighat, P. Huber, S. Li. J.M. Link, C. Mariani, Observation of Reactor Antineutrinos with a Rapidly-deployable Surface-level Detector, Phys. Rev. Appl. 13 (2020) 034028. DOI:https://doi.org/10.1103/PhysRevApplied.13.034028 11. M. Y. Hua, C.A. Bravo, A.T. MacDonald, J.D. Hutchinson, G.E. McKenzie, B.C. Kiedrowski, S.D. Clarke, S.A. Pozzi, “Rossi-alpha measurements of fast plutonium metal assemblies using organic scintillators,” Nuclear Instruments and Methods in Physics Research Section A, Accepted on January 20, 2020. https://doi. org/10.1016/j.nima.2020.163507 12. J. Zhou, A. Di Fulvio, K. Beyer, M. Ferrarini, M. Pullia, M. Donetti, S. D. Clarke and S. A. Pozzi, “Angular distribution of neutron production by proton and carbon- ion therapeutic beams,” Physics in Medicine & Biology, Accepted on March 20, 2020. https://iopscience.iop.org/article/10.1088/1361-6560/ab81ca 13. W. M. Steinberger, M. L. Ruch, N. P. Giha, A. Di Fulvio, P. Marleau, S. D. Clarke, S. A. Pozzi, “Imaging of Special Nuclear Material Using a Handheld Dual Particle Imager,” Sci Rep 10, 1855 (2020). https://doi.org/10.1038/s41598-020-58857-z . 14. U. Shirwadkar, E. van Loef, G. Markosyan, J. Tower, M. Spens, C. Ji, L. S. Pandian, A. Gueorguiev, J. Glodo, K. Shah, S. A. Pozzi, S. D. Clarke, W. Langeveld, D. Strellis, J. Garcia, “Low-cost, multi-mode detector solutions”, Nuclear Instruments and Methods in Physics Research Section A, vol. 954, 161289, 2020. https:// doi.org/10.1016/j.nima.2018.09.124 15. M. Y. Hua, B. Goddard, C. Lloyd, E. C. Leppink, S. A. Abraham, J. D. Noey, S. D. Clarke, and S. A. Pozzi, “Simulation of the Nondestructive Assay of 237Np using Active Neutron Multiplicity Counting,” Nuclear Science and Engineering, vol. 194, pp. 154-162, 2020. https://doi.org/10.1080/00295639.2019.1654329 16. C. A. Miller, B. Ludewigt, C. Geddes, S. A. Pozzi “Verification of dry storage cask loading using monoenergetic photon sources”, Annals of Nuclear Energy, vol. 137, 2020. https://doi.org/10.1016/j.anucene.2019.107091 17. K. Ogren, J. Nattress, and I. Jovanovic, “Discriminating Uranium Isotopes Based on Fission Signatures Induced by Delayed Neutrons”, Physical Review Applied, in press. arXiv:1911.05812 18. M. Burger, P. J. Skrodzki, L. A. Finney, J. A. Nees, and I. Jovanovic, “Remote Detection of Uranium using Free-Propagating Intense Femtosecond Laser Pulses”, Remote Sensing 12, 1281 (2020). 19. A. Foster, A. Meddeb, M. Wonders, M. Flaska, M. Sharma, Z. Ounaies, and I. Jovanovic, “On the Fabrication and Characterization of Heterogeneous Composite Neutron Detectors with Triple-Pulse-Shape-Discrimination Capability”, Nuclear Instruments and Methods in Physics Research A 954, 161681 (2020). 20. E. J. Kautz, P. J. Skrodzki, M. Burger, B. E. Bernacki, I. Jovanovic, M. C. Phillips, S. S. Harilal, “Time-resolved imaging of atoms and molecules in laser-produced uranium plasmas”, Journal of Analytical Atomic Spectrometry 34, 2236 (2019). 21. M. Burger, P. J. Skrodzki, I. Jovanovic, M. C. Phillips, and S. S. Harilal, “Laser-produced uranium plasma characterization and Stark broadening measurements”, Physics of Plasmas 26, 093103 (2019). 22. Noey, J. D., Xiao, J. B., DiFulvio, A., Sulieman, N. A., Carmona, M. A., Chung, L.K., El-Amir, I. N., Frank, S. J., Liu, K., Schiefer, K., Seekamp, J. M., Sosa, C. S., Trimas, D. J., Vyas, A. P., Kearfott, K. J., “The Effects of Radiation and Emitted Light Transport on the Positional Response of 11 cm x 42.5 cm x 5.5 cm NaI(TI) Detectors”, Health Phys, 117(4): 362-377, 2019. DOI: 10.1097/HP.0000000000001051 23. Moritz Kütt and Alexander Glaser, “Vintage Electronics for Trusted Radiation Measurements and Verified Dismantlement of Nuclear Weapons,” PLOS ONE, October 30, 2019. DOI: https://doi.org/10.1371/journal.pone.0224149 24. C. A. Miller, C.G.R. Geddes, S.D. Clarke, S.A. Pozzi “Shielding a monoenergetic photon source for nonproliferation applications analysis,” Nuclear Instruments and Methods in Physics Research Section A, vol. 954, 161849, 2020. https://doi.org/10.1016/j.nima.2019.01.075 25. T. H. Shin, C. A. Bravo, W. Geist, J. Marlow, S. D. Clarke, and S. A. Pozzi, Neutron-neutron angular and energy-angle correlations of plutonium samples with varying α-ratio, Nuclear Instruments and Methods in Physics Research Section A, vol. 946, pp. 162297, 2019. https://doi.org/10.1016/j.nima.2019.06.038

MTV NEWSLETTER, 2020 16