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Data from the Lunar Exploration Neutron Detector (LEND) Collimated Sensors for Epithermal Neutrons (CSETN) are used in conjunction with a model based on results from the Lunar Prospector mission to quantify the extent of the background in…

地球与行星天体物理 · 物理学 2012-02-10 V. R. Eke , L. F. A. Teodoro , D. J. Lawrence , R. C. Elphic , W. C. Feldman

A new analysis of the Lunar Prospector epithermal neutron data is presented, providing an improved map of the distribution of hydrogen near to the lunar poles. This is achieved using a specially developed pixon image reconstruction…

天体物理学 · 物理学 2009-11-13 V. R. Eke , L. F. A. Teodoro , R. C. Elphic

The measured neutron flux from the Moons south polar region shows evidence of locally enhanced hydrogen concentrations, likely in the form of water ice, within most permanently shadowed regions (PSR), poleward of 77 deg S latitude. Results…

This paper reviews improved calibration methods for the Lunar Reconnaissance Orbiter Lunar Exploration Neutron Detector. We cross calibrated the set of LEND observations and models of its detectors physical geometry and composition against…

地球与行星天体物理 · 物理学 2021-04-13 J. J. Su , T. P. McClanahan , A. M. Parsons , R. Sagdeev , W. V. Boynton , G. Chin , T. A. Livengood , R. D. Starr , D. Hamara

The detection and characterization of lunar water are critical for enabling sustainable human and robotic exploration of the Moon. Orbital neutron spectrometers, such as instruments on Lunar Prospector and the Lunar Reconnaissance Orbiter,…

We present a map of the near subsurface hydrogen distribution on Mars, based on epithermal neutron data from the Mars Odyssey Neutron Spectrometer. The map's spatial resolution is approximately improved two-fold via a new form of the pixon…

We assess local-time variations of epithermal-neutron count rates measured by the Lunar Prospector Neutron Spectrometer. We investigate the nature of these variations and find no evidence to support the idea that such variations are caused…

地球与行星天体物理 · 物理学 2015-01-26 L. F. A. Teodoro , D. J. Lawrence , V. R. Eke , R. E. Elphic , W. C. Feldman , S. Maurice , M. A. Siegler , D. A. Paige

The variation of remotely sensed neutron count rates is measured as a function of cratercentric distance using data from the Lunar Prospector Neutron Spectrometer. The count rate, stacked over many craters, peaks over the crater centre, has…

We present improved resolution maps of the Lunar Prospector Neutron Spectrometer thermal, epithermal and fast neutron data and Gamma-Ray Spectrometer Th-line fluxes via global application of pixon image reconstruction techniques. With the…

The amount and distribution of water on the lunar surface are related to the input and production of water by solar wind and meteoroid bombardment, balanced by photodestruction and mobility across the surface. Using the Stratospheric…

地球与行星天体物理 · 物理学 2023-02-22 William T. Reach , Paul G. Lucey , Casey I. Honniball , Anicia Arredondo , Erick R. Malaret

The Los Alamos National Laboratory designed and built Mars Odyssey Neutron Spectrometer (MONS) has been in excellent health operating from February 2002 to the present. MONS measures the neutron leakage albedo from galactic cosmic ray…

天体物理仪器与方法 · 物理学 2019-08-16 K. E. Mesick , W. C. Feldman , E. R. Mullin , L. C. Stonehill

We propose to build the Electromagnetic calorimeter for the HADES di-lepton spectrometer. It will enable to measure the data on neutral meson production from nucleus-nucleus collisions, which are essential for interpretation of dilepton…

We present improved Mars Odyssey Neutron Spectrometer (MONS) maps of near-surface Water-Equivalent Hydrogen (WEH) on Mars that have intriguing implications for the global distribution of "excess" ice, which occurs when the mass fraction of…

地球与行星天体物理 · 物理学 2017-12-05 Asmin V. Pathare , William C. Feldman , Thomas H. Prettyman , Sylvestre Maurice

Direct searches for dark matter with large-scale noble liquid detectors have become sensitive enough to detect the coherent scattering of local neutrinos. This will become a very challenging background to dark matter discovery in planned…

高能物理 - 唯象学 · 物理学 2023-05-10 Andrea Gaspert , Pietro Giampa , Navin McGinnis , David E. Morrissey

LunPAN (Lunar Particle Analyzer Network) is a three-year mission proposal designed to comprehensively map the particle spectra in the lunar radiation field. It aims to provide precise measurements of Galactic Cosmic Rays (GCR), Solar…

The Red Planet has fascinated humans for millennia, especially for the last few centuries, and particularly during the Space Age. The nagging suspicion of extant Martian life is both fed by, and drives the many space missions to Mars and…

天体物理仪器与方法 · 物理学 2020-08-14 Robert Hunt

Crater counting on the Moon and other bodies is crucial to constrain the dynamical history of the Solar System. This has traditionally been done by visual inspection of images, thus limiting the scope, efficiency, and/or accuracy of…

地球与行星天体物理 · 物理学 2018-11-13 Ari Silburt , Mohamad Ali-Dib , Chenchong Zhu , Alan Jackson , Diana Valencia , Yevgeni Kissin , Daniel Tamayo , Kristen Menou

The COHERENT collaboration is deploying a suite of low-energy detectors in a low-background corridor of the ORNL Spallation Neutron Source (SNS) to measure coherent elastic neutrino-nucleus scattering (CEvNS) on an array of nuclear targets…

仪器与探测器 · 物理学 2018-07-01 R. Tayloe

The lifetime of free neutrons measured in the lab has a long standing disparity of $\sim$9~s. A space-based technique has recently been proposed to independently measure the neutron lifetime using interactions between the galactic cosmic…

核实验 · 物理学 2025-05-09 Akshatha K. Vydula , Daniel Coupland , Katherine Mesick , Craig Hardgrove

Cosmic-Ray Neutron Sensing (CRNS) is a novel technique for determining environmental water content by measuring albedo neutrons in the epithermal to fast energy range with moderated neutron detectors. We have investigated the response…

仪器与探测器 · 物理学 2018-08-01 M. Köhli , M. Schrön , U. Schmidt
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