Patrick Peplowski Print


  240-228-3979

  Patrick.Peplowski@jhuapl.edu

: SES

:   Nuclear spectroscopist; Experimental nuclear physicist; Radiation physicist

:  Planetary

  Dragonfly, DraGNS, Martian Moons eXploration, MEGANE, MESSENGER, GRNS, NEAR, XGRS, Psyche, GRNS

 
Degree Field of Study Year Attained Institution Name
Ph.D. Physics 2009 Florida State University
M.S. Physics 2005 Florida State University
B.S. Physics 2004 University of Washington

I am an experimental nuclear physicist specializing in nuclear (gamma-ray and neutron) spectroscopy of solar system objects, fundamental nuclear physics, and radiation transport modeling. My spaceflight mission experience includes development and operation of gamma-ray and neutron spectroscopy instruments on MESSENGER, Dawn, Psyche, MMX, and Dragonfly. I'm the Principal Investigator for grants awarded under NASA's Planetary Mission Data Analysis Program (PMDAP), Mars Data Analysis Program (MDAP), and Discovery Data Analysis Program (DDAP). My planetary science research is focused is the elemental composition of Mercury, the Moon, and small solar-system objects (asteroids 433 Eros, 4 Vesta, 16 Psyche, and Mars' moons). I am also involved with nuclear physics research, making measurements of reaction cross sections aimed at improving our understanding of nuclear spallation (breakup) and light-cluster emission/breakup. I work extensiviely on the development of instrumentation, including radiation damage and repair of gamma-ray sensors, and the response of neutron sensors. I hold visiting researcher status at Brookhaven National Laboratory and the NIST Center for Neutron Research.

 
AGU Index Category AGU Index Sub-Category
GEOCHEMISTRY Composition of the planets
SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY X-rays, gamma rays, and neutrinos
GEOCHEMISTRY Planetary geochemistry
INTERPLANETARY PHYSICS Cosmic rays
INTERPLANETARY PHYSICS Instruments and techniques
PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS Mercury
PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS Moon
PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS Asteroids
PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS Instruments and techniques
:
Start Year End Year Description
2010 Current Principal Professional Staff, Johns Hopkins University Applied Physics Laboratory
2009 2010 Post-Doctoral Research Associate, Pacific Northwest National Laboratory
2004 2009 Research Associate, Florida State University John D. Fox Accelerator Facility
2001 2004 Student Assistant, Center for Experimental Nuclear Physics and Astrophysics
Year Description
2019 NASA Group Achievement Award, Dawn at Ceres Science Team
2018 APL Technical Achievement Award, Outstanding Paper in the Johns Hopkins Technical Journall, for Dragonfly: A Rotocraft Lander Concept for Scientific Exploration of Titan (coauthor)
2017 NASA Group Achievement Award, MESSENGER Project Team
2016 APL Technical Achievement Award, Outstanding Research Paper in an Externally Referred Journal Publication, for Remote Sensing Evidence for a Ancient Carbon-Bearing Crust on Mercury, in Nature Geoscience
2013 APL Technical Achievement Award, Outstanding Research Paper in an Externally Referred Journal Publication, for Evidence for Water Ice Near Mercury's North Pole from MESSENGER Neutron Spectrometer Measurements, in Science Magazine (coauthor)
2013 NASA Group Achievement Award, Dawn at Vesta Science Team
2012 APL Technical Achievement Award, Authors First Paper in a Peer-Reviewed Journal, for Radioactive Elements on Mercury's Surface from MESSENGER: Implications for the Planet's Formation and Evolution, in Science Magazine
2003 Mary Gates Research Training Grant
1999-2000 Washington State Promise Scholarship
:
The following publication information was downloaded from

ORCID logo https://orcid.org/0000-0001-7154-8143

.
Patrick N. Peplowski, Andrew W. Beck, David J. Lawrence, (2016), Geochemistry of the lunar highlands as revealed by measurements of thermal neutrons, Journal of Geophysical Research-Planets, 121, 3, 388-401

Daniel N. Baker, Ryan M. Dewey, David J. Lawrence, John O. Goldsten, Patrick N. Peplowski, Haje Korth, James A. Slavin, Stamatios M. Krimigis, Brian J. Anderson, George C. Ho, Ralph L. McNutt, Jim M. Raines, David Schriver, Sean C. Solomon, (2016), Intense energetic electron flux enhancements in Mercury's magnetosphere: An integrated view with high-resolution observations from MESSENGER, Journal of Geophysical Research-Space Physics, 121, 3, 2171-2184

Patrick N. Peplowski, Rachel L. Klima, David J. Lawrence, Carolyn M. Ernst, Brett W. Denevi, Elizabeth A. Frank, John O. Goldsten, Scott L. Murchie, Larry R. Nittler, Sean C. Solomon, (2016), Remote sensing evidence for an ancient carbon-bearing crust on Mercury, Nature Geoscience, 9, 4, 273-+

David J. Lawrence, Patrick N. Peplowski, Jeffrey B. Plescia, Benjamin T. Greenhagen, Sylvestre Maurice, Thomas H. Prettyman, (2015), Bulk hydrogen abundances in the lunar highlands: Measurements from orbital neutron data, Icarus, 255, 127-134

Larry G. Evans, Patrick N. Peplowski, Francis M. McCubbin, Timothy J. McCoy, Larry R. Nittler, Mikhail Yu. Zolotov, Denton S. Ebel, David J. Lawrence, Richard D. Starr, Shoshana Z. Weider, Sean C. Solomon, (2015), Chlorine on the surface of Mercury: MESSENGER gamma-ray measurements and implications for the planet's formation and evolution, Icarus, 257, 417-427

David J. Lawrence, Brian J. Anderson, Daniel N. Baker, William C. Feldman, George C. Ho, Haje Korth, Ralph L. McNutt, Patrick N. Peplowski, Sean C. Solomon, Richard D. Starr, Jon D. Vandegriff, Reka M. Winslow, (2015), Comprehensive survey of energetic electron events in Mercury's magnetosphere with data from the MESSENGER Gamma-Ray and Neutron Spectrometer, Journal of Geophysical Research-Space Physics, 120, 4, 2851-2876

Patrick N. Peplowski, David J. Lawrence, Larry G. Evans, Rachel L. Klima, David T. Blewett, John O. Goldsten, Scott L. Murchie, Timothy J. McCoy, Larry R. Nittler, Sean C. Solomon, Richard D. Starr, Shoshana Z. Weider, (2015), Constraints on the abundance of carbon in near-surface materials on Mercury: Results from the MESSENGER Gamma-Ray Spectrometer, Planetary and Space Science, 108, 98-107

Shoshana Z. Weider, Larry R. Nittler, Richard D. Starr, Ellen J. Crapster-Pregont, Patrick N. Peplowski, Brett W. Denevi, James W. Head, Paul K. Byrne, Steven A. Hauck, Denton S. Ebel, Sean C. Solomon, (2015), Evidence for geochemical terranes on Mercury: Global mapping of major elements with MESSENGER's X-Ray Spectrometer, Earth and Planetary Science Letters, 416, 109-120

Patrick N. Peplowski, David J. Lawrence, William C. Feldman, John O. Goldsten, David Bazell, Larry G. Evans, James W. Head, Larry R. Nittler, Sean C. Solomon, Shoshana Z. Weider, (2015), Geochemical terranes of Mercury's northern hemisphere as revealed by MESSENGER neutron measurements, Icarus, 253, 346-363

David J. Lawrence, Richard S. Miller, Martin T. Ozimek, Patrick N. Peplowski, Christopher J. Scott, (2015), High-resolution mapping of lunar polar hydrogen with a low-resource orbital mission, Acta Astronautica, 115, 452-462

Patrick N. Peplowski, David Bazell, Larry G. Evans, John O. Goldsten, David J. Lawrence, Larry R. Nittler, (2015), Hydrogen and major element concentrations on 433 Eros: Evidence for an L- or LL-chondrite-like surface composition, Meteoritics & Planetary Science, 50, 3, 353-367

William C. Feldman, David J. Lawrence, W. Thomas Vestrand, Daniel N. Baker, Patrick N. Peplowski, Douglas J. Rodgers, (2015), Long-duration neutron production by nonflaring transients in the solar corona, Journal of Geophysical Research-Space Physics, 120, 10, 8247-8266

Douglas J. Rodgers, David J. Lawrence, William C. Feldman, Patrick N. Peplowski, (2015), Neutrons and energetic charged particles in the inner heliosphere: Measurements of the MESSENGER Neutron Spectrometer from 0.3 to 0.85 AU, Journal of Geophysical Research-Space Physics, 120, 2, 841-854

David J. Lawrence, William C. Feldman, Patrick N. Peplowski, Sean C. Solomon, (2015), The 4 June 2011 neutron event at Mercury: A defense of the solar origin hypothesis, Journal of Geophysical Research-Space Physics, 120, 7, 5284-5289

Andrew W. Beck, David J. Lawrence, Patrick N. Peplowski, Thomas H. Prettyman, Timothy J. McCoy, Harry Y. McSween, Michael J. Toplis, Naoyuki Yamashita, (2015), Using HED meteorites to interpret neutron and gamma-ray data from asteroid4 Vesta, Meteoritics & Planetary Science, 50, 8, 1311-1337

David J. Lawrence, William C. Feldman, John O. Goldsten, Patrick N. Peplowski, Douglas J. Rodgers, Sean C. Solomon, (2014), Detection and characterization of 0.5-8 MeV neutrons near Mercury: Evidence for a solar origin, Journal of Geophysical Research-Space Physics, 119, 7, 5150-5171

Patrick N. Peplowski, Larry G. Evans, Karen R. Stockstill-Cahill, David J. Lawrence, John O. Goldsten, Timothy J. McCoy, Larry R. Nittler, Sean C. Solomon, Ann L. Sprague, Richard D. Starr, Shoshana Z. Weider, (2014), Enhanced sodium abundance in Mercury's north polar region revealed by the MESSENGER Gamma-Ray Spectrometer, Icarus, 228, 86-95

A. W. Beck, D. J. Lawrence, P. N. Peplowski, T. H. Prettyman, T. J. McCoy, (2014), FAST NEUTRONS IN HEDS: NEW INSIGHTS INTO DAWN DATA AND NEUTRON SPECTROSCOPY, Meteoritics & Planetary Science, 49, A28

Deborah L. Domingue, Clark R. Chapman, Rosemary M. Killen, Thomas H. Zurbuchen, Jason A. Gilbert, Menelaos Sarantos, Mehdi Benna, James A. Slavin, David Schriver, Pavel M. Travnicek, Thomas M. Orlando, Ann L. Sprague, David T. Blewett, Jeffrey J. Gillis-Davis, William C. Feldman, David J. Lawrence, George C. Ho, Denton S. Ebel, Larry R. Nittler, Faith Vilas, Carle M. Pieters, Sean C. Solomon, Catherine L. Johnson, Reka M. Winslow, Joern Helbert, Patrick N. Peplowski, Shoshana Z. Weider, Nelly Mouawad, Noam R. Izenberg, William E. McClintock, (2014), Mercury's Weather-Beaten Surface: Understanding Mercury in the Context of Lunar and Asteroidal Space Weathering Studies, Space Science Reviews, 181, 1-4, 121-214

A. G. Holmes-Siedle, J. O. Goldsten, R. H. Maurer, P. N. Peplowski, (2014), RadFET Dosimeters in the Belt: the Van Allen Probes on Day 365, Ieee Transactions on Nuclear Science, 61, 2, 948-954

Patrick N. Peplowski, David J. Lawrence, Thomas H. Prettyman, Naoyuki Yamashita, Dave Bazell, William C. Feldman, Lucille Le Corre, Timothy J. McCoy, Vishnu Reddy, Robert C. Reedy, Chris T. Russell, Michael J. Toplis, (2013), Compositional variability on the surface of 4 Vesta revealed through GRaND measurements of high-energy gamma rays, Meteoritics & Planetary Science, 48, 11, 2252-2270

David J. Lawrence, Patrick N. Peplowski, Thomas H. Prettyman, William C. Feldman, David Bazell, David W. Mittlefehldt, Robert C. Reedy, Naoyuki Yamashita, (2013), Constraints on Vesta's elemental composition: Fast neutron measurements by Dawn's gamma ray and neutron detector, Meteoritics & Planetary Science, 48, 11, 2271-2288

N. Yamashita, T. H. Prettyman, D. W. Mittlefehldt, M. J. Toplis, T. J. McCoy, A. W. Beck, R. C. Reedy, W. C. Feldman, D. J. Lawrence, P. N. Peplowski, O. Forni, H. Mizzon, C. A. Raymond, C. T. Russell, (2013), Distribution of iron on Vesta, Meteoritics & Planetary Science, 48, 11, 2237-2251

Richard H. Maurer, John O. Goldsten, Patrick N. Peplowski, Andrew G. Holmes-Siedle, Michael H. Butler, Carl C. Herrmann, Barry H. Mauk, (2013), Early Results From the Engineering Radiation Monitor (ERM) and Solar Cell Monitor on the Van Allen Probes Mission, Ieee Transactions on Nuclear Science, 60, 6, 4053-4058

David J. Lawrence, William C. Feldman, John O. Goldsten, Sylvestre Maurice, Patrick N. Peplowski, Brian J. Anderson, David Bazell, Ralph L. McNutt, Larry R. Nittler, Thomas H. Prettyman, Douglas J. Rodgers, Sean C. Solomon, Shoshana Z. Weider, (2013), Evidence for Water Ice Near Mercury's North Pole from MESSENGER Neutron Spectrometer Measurements, Science, 339, 6117, 292-296

Thomas H. Prettyman, David W. Mittlefehldt, Naoyuki Yamashita, Andrew W. Beck, William C. Feldman, John S. Hendricks, David J. Lawrence, Timothy J. McCoy, Harry Y. McSween, Patrick N. Peplowski, Robert C. Reedy, Michael J. Toplis, Lucille Le Corre, Hugau Mizzon, Vishnu Reddy, Timothy N. Titus, Carol A. Raymond, Christopher T. Russell, (2013), Neutron absorption constraints on the composition of 4 Vesta, Meteoritics & Planetary Science, 48, 11, 2211-2236

Patrick N. Peplowski, David J. Lawrence, (2013), New insights into the global composition of the lunar surface from high-energy gamma rays measured by Lunar Prospector, Journal of Geophysical Research-Planets, 118, 4, 671-688

Lucille Le Corre, Vishnu Reddy, Nico Schmedemann, Kris J. Becker, David P. O'Brien, Naoyuki Yamashita, Patrick N. Peplowski, Thomas H. Prettyman, Jian-Yang Li, Edward A. Cloutis, Brett W. Denevi, Thomas Kneisl, Eric Palmer, Robert W. Gaskell, Andreas Nathues, Michael J. Gaffey, David W. Mittlefehldt, William B. Garry, Holger Sierks, Christopher T. Russell, Carol A. Raymond, Maria C. De Sanctis, Eleonora Ammanito, (2013), Olivine or impact melt: Nature of the "Orange" material on Vesta from Dawn, Icarus, 226, 2, 1568-1594

A. G. Holmes-Siedle, J. O. Goldsten, R. H. Maurer, P. N. Peplowski, IEEE, (2013), RADFET DOSIMETERS IN THE BELT: the VAN ALLEN PROBES ON DAY 365, 2013 14th European Conference on Radiation and Its Effects on Components and Systems (Radecs)

J. P. Mitchell, G. V. Rogachev, E. D. Johnson, L. T. Baby, K. W. Kemper, A. M. Moro, P. Peplowski, A. S. Volya, I. Wiedenhoever, (2013), Structure of B-8 from elastic and inelastic Be-7 + p scattering, Physical Review C, 87, 5

Brett W. Denevi, Carolyn M. Ernst, Heather M. Meyer, Mark S. Robinson, Scott L. Murchie, Jennifer L. Whitten, James W. Head, Thomas R. Watters, Sean C. Solomon, Lillian R. Ostrach, Clark R. Chapman, Paul K. Byrne, Christian Klimczak, Patrick N. Peplowski, (2013), The distribution and origin of smooth plains on Mercury, Journal of Geophysical Research-Planets, 118, 5, 891-907

J. O. Goldsten, R. H. Maurer, P. N. Peplowski, A. G. Holmes-Siedle, C. C. Herrmann, B. H. Mauk, (2013), The Engineering Radiation Monitor for the Radiation Belt Storm Probes Mission, Space Science Reviews, 179, 1-4, 485-502

Patrick N. Peplowski, Edgar A. Rhodes, David K. Hamara, David J. Lawrence, Larry G. Evans, Larry R. Nittler, Sean C. Solomon, (2012), Aluminum abundance on the surface of Mercury: Application of a new background-reduction technique for the analysis of gamma-ray spectroscopy data, Journal of Geophysical Research-Planets, 117

Larry G. Evans, Patrick N. Peplowski, Edgar A. Rhodes, David J. Lawrence, Timothy J. McCoy, Larry R. Nittler, Sean C. Solomon, Ann L. Sprague, Karen R. Stockstill-Cahill, Richard D. Starr, Shoshana Z. Weider, William V. Boynton, David K. Hamara, John O. Goldsten, (2012), Major-element abundances on the surface of Mercury: Results from the MESSENGER Gamma-Ray Spectrometer, Journal of Geophysical Research-Planets, 117

Patrick N. Peplowski, Peter D. Hepplewhite, David J. Lawrence, William C. Feldman, Charles A. Hibbitts, (2012), Operation of a He-3 proportional counter in the Ganymede radiation environment, Planetary and Space Science, 61, 1, 46-52

Patrick N. Peplowski, David J. Lawrence, Edgar A. Rhodes, Ann L. Sprague, Timothy J. McCoy, Brett W. Denevi, Larry G. Evans, James W. Head, Larry R. Nittler, Sean C. Solomon, Karen R. Stockstill-Cahill, Shoshana Z. Weider, (2012), Variations in the abundances of potassium and thorium on the surface of Mercury: Results from the MESSENGER Gamma-Ray Spectrometer, Journal of Geophysical Research-Planets, 117, L4

P. N. Peplowski, D. K. Hamara, D. J. Lawrence, T. J. McCoy, W. V. Boynton, L. G. Evans, E. A. Rhodes, S. C. Solomon, L. R. Nittler, A. L. Sprague, (2011), ABUNDANCES OF RADIOACTIVE ELEMENTS ON THE SURFACE OF MERCURY: FIRST RESULTS FROM THE MESSENGER GAMMA-RAY SPECTROMETER, Meteoritics & Planetary Science, 46, A185

Edgar A. Rhodes, Larry G. Evans, Larry R. Nittler, Richard D. Starr, Ann L. Sprague, David J. Lawrence, Timothy J. Mccoy, Karen R. Stockstill-Cahill, John O. Goldsten, Patrick N. Peplowski, David K. Hamara, William V. Boynton, Sean C. Solomon, (2011), Analysis of MESSENGER Gamma-Ray Spectrometer data from the Mercury flybys, Planetary and Space Science, 59, 15, 1829-1841

Patrick N. Peplowski, David T. Blewett, Brett W. Denevi, Larry G. Evans, David J. Lawrence, Larry R. Nittler, Edgar A. Rhodes, Christina M. Selby, Sean C. Solomon, (2011), Mapping iron abundances on the surface of Mercury: Predicted spatial resolution of the MESSENGER Gamma-Ray Spectrometer, Planetary and Space Science, 59, 13, 1654-1658

David J. Lawrence, John K. Harmon, William C. Feldman, John O. Goldsten, David A. Paige, Patrick N. Peplowski, Edgar A. Rhodes, Christina M. Selby, Sean C. Solomon, (2011), Predictions of MESSENGER Neutron Spectrometer measurements for Mercury's north polar region, Planetary and Space Science, 59, 13, 1665-1669

Patrick N. Peplowski, Larry G. Evans, Steven A. Hauck, Timothy J. McCoy, William V. Boynton, Jeffery J. Gillis-Davis, Denton S. Ebel, John O. Goldsten, David K. Hamara, David J. Lawrence, Ralph L. McNutt, Larry R. Nittler, Sean C. Solomon, Edgar A. Rhodes, Ann L. Sprague, Richard D. Starr, Karen R. Stockstill-Cahill, (2011), Radioactive Elements on Mercury's Surface from MESSENGER: Implications for the Planet's Formation and Evolution, Science, 333, 6051, 1850-1852

Glen A. Warren, Rebecca S. Detwiler, Patrick N. Peplowski, IEEE, (2010), Applications of Nuclear Resonance Fluorescence, 2010 Ieee Nuclear Science Symposium Conference Record (Nss/mic), 534-541

J. J. Ressler, J. A. Caggiano, C. J. Francy, P. N. Peplowski, J. M. Allmond, C. W. Beausang, L. A. Bernstein, D. L. Bleuel, J. T. Burke, P. Fallon, A. A. Hecht, D. V. Jordan, S. R. Lesher, M. A. McMahan, T. S. Palmer, L. Phair, N. D. Scielzo, P. G. Swearingen, G. A. Warren, M. Wiedeking, (2010), Fission fragment isomers populated via Li-6+Th-232, Physical Review C, 81, 1

J. P. Mitchell, G. V. Rogachev, E. D. Johnson, L. T. Baby, K. W. Kemper, A. M. Moro, P. N. Peplowski, A. Volya, I. Wiedenhoever, (2010), Low-lying states in B-8, Physical Review C, 82, 1

P. N. Peplowski, L. T. Baby, I. Wiedenhover, S. E. Dekat, E. Diffenderfer, D. L. Gay, O. Grubor-Urosevic, P. Hoflich, R. A. Kaye, N. Keeley, A. Rojas, A. Volya, (2009), Physical Review C, 79, 3

Glen Warren, Jac Caggiano, Patrick Peplowski, K BharuthRam, (2009), Potential Applications of Nuclear Resonance Fluorescence, International Conference on Applications of Nuclear Techniques, 1194, 106-119

E. D. Johnson, G. V. Rogachev, A. M. Mukhamedzhanov, L. T. Baby, S. Brown, W. T. Cluff, A. M. Crisp, E. Diffenderfer, V. Z. Goldberg, B. W. Green, T. Hinners, C. R. Hoffman, K. W. Kemper, O. Momotyuk, P. Peplowski, A. Pipidis, R. Reynolds, B. T. Roeder, (2006), Astrophysical reaction rate for the neutron-generator reaction C-13(alpha,n)O-16 in asymptotic giant branch stars, Physical Review Letters, 97, 19