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Title: Cosmogenic radionuclide production modeling with Geant4: Experimental benchmarking and application to nuclear spectroscopy of asteroid (16) Psyche

Journal Article · · Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
 [1];  [1];  [2];  [1];  [3];  [1];  [1]
  1. Johns Hopkins Applied Physics Lab., Laurel, MD (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. California Institute of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)
+ Show Author Affiliations

Measurements of gamma-ray emissions from the decay of cosmogenic radionuclides provide an opportunity to characterize the elemental composition of a terrestrial planet or asteroid surface. We report on the development of a Geant4 application which models cosmogenic radionuclide production on metal-rich surfaces. The model was benchmarked using measurements of radionuclides produced during 1 GeV proton irradiation of a target made from the Campo del Cielo iron meteorite. The gamma-ray emitting radionuclides 58Co, 57Co, 56Co, 54Mn, 52Mn, 51Cr, 48V, 46Sc and 22Na were observed following the irradiation. Our model reproduced the measured radionuclide production rates to within a factor of 2.5 or better. All but two of the elements (54Mn, 46Sc) have a perfect model-to-data match within their measurement uncertainties. The benchmarked model was used to predict cosmogenic radionuclide production on a large (~100-km radius) metal-rich asteroid. The results are relevant for planned gamma-ray measurements of the metallic asteroid (16) Psyche, which will be visited by the Psyche spacecraft in 2026. We found that galactic-proton-induced radionuclide decay is unlikely to be observed by the Psyche Gamma-Ray Spectrometer (GRS), however an intense solar proton event (>2×106 protons cm-2 over <5 days) will produce measurable quantities of radioisotopes. Measurements of these radioisotopes could provide an independent method of determining the Ni-to-Fe ratio of materials at Psyche’s surface. Such an analysis will require the use of radionuclide production cross sections to convert GRS-measured cosmogenic radionuclide decay rates to elemental composition information with the ~10% precision required for planetary geochemical studies.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1631525
Report Number(s):
LLNL-JRNL-809380; 1015484; TRN: US2200977
Journal Information:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 446, Issue C; ISSN 0168-583X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (40)

Effects of bulk composition on nuclide production processes in meteorites journal December 1994
Production of cosmogenic nuclides in meteoroids: accelerator experiments and model calculations to decipher the cosmic ray record in extraterrestrial matter journal June 1996
Spallation cross sections for long-lived radionucleides in iron and light nuclei journal February 1964
Updated Partial Cross Sections of Proton‐Nucleus Reactions journal July 1998
Effects of Cosmic Rays on Meteorites: Meteorites are more suitable than terrestrial targets for studying the fossil record of cosmic radiation. journal January 1964
The production of cosmogenic nuclides in stony meteoroids by galactic cosmic-ray particles journal March 2000
Cosmogenic nuclides in extraterrestrial materials journal January 1990
Cosmic-ray Exposure Ages of Meteorites and Lunar Rocks and Their Significance journal January 2003
PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra journal March 2011
Solar Modulation Effects in Terrestrial Production of Carbon-14 journal January 1980
MCNPX benchmark for cosmic ray interactions with the Moon journal January 2006
The JPL proton fluence model: an update journal November 2002
New model calculations for the production rates of cosmogenic nuclides in iron meteorites journal April 2009
the IAB iron-meteorite complex: A group, five subgroups, numerous grouplets, closely related, mainly formed by crystal segregation in rapidly cooling melts journal July 2002
Campo del Cielo iron meteorite: Sample shielding and meteoroid's preatmospheric size journal February 2002
Detection of Rotational Spectral Variation on the M-Type Asteroid (16) Psyche journal December 2016
Technical developments at the NASA Space Radiation Laboratory journal January 2007
Uniform beam distributions at the target of the NASA Space Radiation Laboratory’s beam line journal February 2007
Overview of the NASA space radiation laboratory journal November 2016
Geant4—a simulation toolkit
  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8
journal July 2003
Geant4 developments and applications journal February 2006
Recent developments in Geant4
  • Allison, J.; Amako, K.; Apostolakis, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 835 https://doi.org/10.1016/j.nima.2016.06.125
journal November 2016
JENDL-4.0: A New Library for Nuclear Science and Engineering journal January 2011
ENDF/B-VIII.0: The 8 th Major Release of the Nuclear Reaction Data Library with CIELO-project Cross Sections, New Standards and Thermal Scattering Data journal February 2018
Elemental Mapping by Dawn Reveals Exogenic H in Vesta's Regolith journal September 2012
Hydrogen and major element concentrations on 433 Eros: Evidence for an L‐ or LL ‐chondrite‐like surface composition journal March 2015
Improved modeling of Lunar Prospector neutron spectrometer data: Implications for hydrogen deposits at the lunar poles journal January 2006
Identification and measurement of neutron-absorbing elements on Mercury’s surface journal September 2010
Benchmarking Geant4 for Simulating Galactic Cosmic Ray Interactions Within Planetary Bodies journal July 2018
Radar observations and shape model of asteroid 16 Psyche journal January 2017
Evidence of a metal-rich surface for the Asteroid (16) Psyche from interferometric observations in the thermal infrared journal September 2013
Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids journal May 2005
World-wide cosmic ray variations, 1937-1952 journal December 1954
Cosmic-Ray Modulation by Solar Wind journal June 1958
Solar Modulation of Galactic Cosmic Rays journal November 1968
Characterizing near-surface elemental layering on Mars using gamma-ray spectroscopy: A proof-of-principle experiment
  • Peplowski, Patrick N.; Wilson, Jack T.; Beck, Andrew W.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 415 https://doi.org/10.1016/j.nimb.2017.11.016
journal January 2018
The MESSENGER Gamma-Ray Spectrometer: Calibration and operations journal May 2017
Statistics of solar energetic particle events: Fluences, durations, and time intervals journal January 2007
Radial and Longitudinal Dependence of Solar 4–13 MeV and 27–37 MeV Proton Peak Intensities and Fluences: Helios and IMP 8 Observations journal December 2006
Cross sections for the production of residual nuclides by low- and medium-energy protons from the target elements C, N, O, Mg, Al, Si, Ca, Ti, V, Mn, Fe, Co, Ni, Cu, Sr, Y, Zr, Nb, Ba and Au journal July 1997

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