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Time-resolved neutron/gamma-ray data acquisition for in situ subsurface planetary geochemistry

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Title: Time-resolved neutron/gamma-ray data acquisition for in situ subsurface planetary geochemistry
Authors: Bodnarik, J.G.1,2 julie.g.bodnarik@gmail.com, Burger, D.M.3 dan.burger@vanderbilt.edu, Burger, A.4 aburger@fisk.edu, Evans, L.G.5 larry.g.evans@nasa.gov, Parsons, A.M.1 ann.m.parsons@nasa.gov, Schweitzer, J.S.6 schweitz@phys.uconn.edu, Starr, R.D.7 richard.d.starr@nasa.gov, Stassun, K.G.2 keivan.stassun@vanderbilt.edu
Source: Nuclear Instruments & Methods in Physics Research Section A. Apr2013, Vol. 707, p135-142. 8p.
Subjects: Neutrons, Gamma rays, Data acquisition systems, Geochemistry, United States. National Aeronautics & Space Administration, Goddard Institute for Space Studies
Geographic Terms: United States
Abstract: Abstract: The current gamma-ray/neutron instrumentation development effort at NASA Goddard Space Flight Center aims to extend the use of active pulsed neutron interrogation techniques to probe the subsurface elemental composition of planetary bodies in situ. Previous NASA planetary science missions, that used neutron and/or gamma-ray spectroscopy instruments, have relied on neutrons produced from galactic cosmic rays. One of the distinguishing features of this effort is the inclusion of a high intensity 14.1MeV pulsed neutron generator synchronized with a custom data acquisition system to time each event relative to the pulse. With usually only one opportunity to collect data, it is difficult to set a priori time-gating windows to obtain the best possible results. Acquiring time-tagged, event-by-event data from nuclear induced reactions provides raw data sets containing channel/energy, and event time for each gamma ray or neutron detected. The resulting data set can be plotted as a function of time or energy using optimized analysis windows after the data are acquired. Time windows can now be chosen to produce energy spectra that yield the most statistically significant and accurate elemental composition results that can be derived from the complete data set. The advantages of post-processing gamma-ray time-tagged event-by-event data in experimental tests using our prototype instrument will be demonstrated. [Copyright &y& Elsevier]
Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Time-resolved neutron/gamma-ray data acquisition for in situ subsurface planetary geochemistry
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  Data: <searchLink fieldCode="AR" term="%22Bodnarik%2C+J%2EG%2E%22">Bodnarik, J.G.</searchLink><relatesTo>1,2</relatesTo><i> julie.g.bodnarik@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Burger%2C+D%2EM%2E%22">Burger, D.M.</searchLink><relatesTo>3</relatesTo><i> dan.burger@vanderbilt.edu</i><br /><searchLink fieldCode="AR" term="%22Burger%2C+A%2E%22">Burger, A.</searchLink><relatesTo>4</relatesTo><i> aburger@fisk.edu</i><br /><searchLink fieldCode="AR" term="%22Evans%2C+L%2EG%2E%22">Evans, L.G.</searchLink><relatesTo>5</relatesTo><i> larry.g.evans@nasa.gov</i><br /><searchLink fieldCode="AR" term="%22Parsons%2C+A%2EM%2E%22">Parsons, A.M.</searchLink><relatesTo>1</relatesTo><i> ann.m.parsons@nasa.gov</i><br /><searchLink fieldCode="AR" term="%22Schweitzer%2C+J%2ES%2E%22">Schweitzer, J.S.</searchLink><relatesTo>6</relatesTo><i> schweitz@phys.uconn.edu</i><br /><searchLink fieldCode="AR" term="%22Starr%2C+R%2ED%2E%22">Starr, R.D.</searchLink><relatesTo>7</relatesTo><i> richard.d.starr@nasa.gov</i><br /><searchLink fieldCode="AR" term="%22Stassun%2C+K%2EG%2E%22">Stassun, K.G.</searchLink><relatesTo>2</relatesTo><i> keivan.stassun@vanderbilt.edu</i>
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  Data: Abstract: The current gamma-ray/neutron instrumentation development effort at NASA Goddard Space Flight Center aims to extend the use of active pulsed neutron interrogation techniques to probe the subsurface elemental composition of planetary bodies in situ. Previous NASA planetary science missions, that used neutron and/or gamma-ray spectroscopy instruments, have relied on neutrons produced from galactic cosmic rays. One of the distinguishing features of this effort is the inclusion of a high intensity 14.1MeV pulsed neutron generator synchronized with a custom data acquisition system to time each event relative to the pulse. With usually only one opportunity to collect data, it is difficult to set a priori time-gating windows to obtain the best possible results. Acquiring time-tagged, event-by-event data from nuclear induced reactions provides raw data sets containing channel/energy, and event time for each gamma ray or neutron detected. The resulting data set can be plotted as a function of time or energy using optimized analysis windows after the data are acquired. Time windows can now be chosen to produce energy spectra that yield the most statistically significant and accurate elemental composition results that can be derived from the complete data set. The advantages of post-processing gamma-ray time-tagged event-by-event data in experimental tests using our prototype instrument will be demonstrated. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=85617162
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        Value: 10.1016/j.nima.2012.12.110
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        Text: English
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              Text: Apr2013
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