Journal ArticleDOI
Instrument Calibrations and Data Analysis Procedures for the NEAR X-Ray Spectrometer
R. D. Starr,Pamela Elizabeth Clark,M. E. Murphy,S. R. Floyd,T. P. McClanahan,Larry R. Nittler,Jacob I. Trombka,Larry G. Evans,William V. Boynton,Samuel Bailey,J. S. Bhangoo,I. Mikheeva,J. Brückner,S. W. Squyres,E. McCartney,John O. Goldsten,Ralph L. McNutt +16 more
TLDR
The X-ray spectrometer onboard the Near Earth Asteroid Rendezvous spacecraft will measure X-rays from the surface of 433 Eros in the energy region 0.7-10 keV as discussed by the authors.About:
This article is published in Icarus.The article was published on 2000-10-01. It has received 28 citations till now. The article focuses on the topics: Spectrometer.read more
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Quiet-sun X-rays as signature for new particles
Konstantin Zioutas,Konstantin Zioutas,Konstantin Zioutas,Konrad Dennerl,L. DiLella,Dieter H. H. Hoffmann,J. Jacoby,Th. Papaevangelou +7 more
TL;DR: In this article, the Yohkoh solar X-ray mission was used to search for signals from radiative decays of new, as yet undiscovered massive neutral particles, based on the prediction that solar axions of the Kaluza-Klein type should result in the emission of X-rays from the Sun direction beyond the limb.
Journal ArticleDOI
Global Mg/Si and Al/Si Distributions on the Lunar Surface Derived from Chang’E-2 X-ray Spectrometer
TL;DR: In this article, the authors present the preliminary results about the first global Mg/Si and Al/Si maps of the lunar surface and show that the distributions of Mg and Si correlate well with terrains on the Moon.
Journal ArticleDOI
Validation of methodology to derive elemental abundances from X-ray observations on Chandrayaan-1
TL;DR: In this paper, the authors used the concept of flux fraction to derive abundances of major elements (weight percentages > 1%) from the Chandrayaan-1 X-ray Spectrometer (C1XS) observations.
Journal ArticleDOI
Global Mg/Si and Al/Si Distributions on Lunar Surface Derived from Chang'E-2 X-ray Spectrometer
TL;DR: In this article, the first global Mg/Si and Al/Si maps on the lunar surface were presented and the results showed that the distributions of Mg and Si correlate well with the terrains of the Moon.
References
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Radiation detection and measurement
TL;DR: In this paper, the authors present a detailed analysis of the effect of different types of detectors on the performance of the detection of neutrons and their effect on the detection efficiency and error prediction.
Journal ArticleDOI
Apollo 15 Geochemical X-ray Fluorescence Experiment: Preliminary Report.
I. Adler,Jacob I. Trombka,J. Gerard,Paul D. Lowman,R. Schmadebeck,H. Blodget,E. Eller,Lo I Yin,R. Lamothe,P. Gorenstein,Paul Bjorkholm +10 more
TL;DR: The results indicate the existence of a differential lunar highland crust, probably feldspathic, related to the plagioclase-rich materials previously found in the samples from Apollo 11, Apollo 12, Apollo 14, Apollo 15, and Luna 16.
Journal ArticleDOI
Apollo 16 geochemical x-ray fluorescence experiment: preliminary report.
I. Adler,Jacob I. Trombka,J. Gerard,Paul D. Lowman,R. Schmadebeck,H. Blodget,E. Eller,Lo I Yin,R. Lamothe,G. Osswald,P. Gorenstein,Paul Bjorkholm,H. Gursky,B. Harris +13 more
TL;DR: The lunar surface was mapped with respect to magnesium, aluminum, and silicon as aluminum/ silicon and magnesium/ silicon intensity ratios along the projected ground tracks swept out by the orbiting Apollo 16 spacecraft to confirm the idea that the moon has a widespread differentiated crust (the highlands).
Journal ArticleDOI
Remote X-ray spectrometry for NEAR and future missions: Modeling and analyzing X-ray production from source to surface
P. E. Clark,J. I. Trombka +1 more
TL;DR: In this article, the authors discuss the nature of such variations expected for missions to an asteroid, the Moon, and Mercury, and discuss an effective means of removing the effects of solar variability from surface measurements, as indicated by the agreement between theoretical models presented here and Apollo X-ray observations.
Journal ArticleDOI
Compositional mapping with the NEAR X ray/gamma ray spectrometer
Jacob I. Trombka,S. R. Floyd,William V. Boynton,Samuel Bailey,J. Brückner,S. W. Squyres,Larry G. Evans,Pamela Elizabeth Clark,R. D. Starr,E. M. Fiore,Robert E. Gold,John O. Goldsten,Ralph L. McNutt +12 more
TL;DR: The X ray/gamma ray spectrometer (XGRS) instrument on board the NEAR spacecraft will map asteroid 433 Eros in the 07 keV to 10 MeV energy region as discussed by the authors.
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X‐ray fluorescence measurements of the surface elemental composition of asteroid 433 Eros
The elemental composition of asteroid 433 Eros: Results of the NEAR-Shoemaker X-ray spectrometer
J. Trombka,S. W. Squyres,J. Brückner,William V. Boynton,Robert C. Reedy,Timothy J. McCoy,P. Gorenstein,Larry G. Evans,James R. Arnold,R. D. Starr,Larry R. Nittler,M. E. Murphy,I. Mikheeva,Ralph L. McNutt,T. P. McClanahan,E. McCartney,John O. Goldsten,Robert E. Gold,S. R. Floyd,Pamela Elizabeth Clark,Thomas H. Burbine,J. S. Bhangoo,Samuel Bailey,M. Petaev +23 more
The X-Ray Spectrometer on the MESSENGER Spacecraft
C. E. Schlemm,R. D. Starr,George C. Ho,K. Bechtold,Sarah A. Hamilton,John D. Boldt,William V. Boynton,Walter Bradley,Martin Fraeman,Robert E. Gold,John O. Goldsten,John Hayes,S. E. Jaskulek,Egidio Rossano,Robert A. Rumpf,Edward D. Schaefer,K. Strohbehn,Richard G. Shelton,Raymond E. Thompson,Jacob I. Trombka,Bruce D. Williams +20 more