Mapping the elemental composition of Ceres and Vesta: Dawn's gamma ray and neutron detector

被引：8

作者：

Prettyman, TH ^{[1
]}

Feldman, WC ^{[1
]}

Barraclough, BL ^{[1
]}

Capria, MT ^{[1
]}

Coradini, A ^{[1
]}

Enemark, DC ^{[1
]}

Fuller, KR ^{[1
]}

Lawrence, DJ ^{[1
]}

Patrick, DE ^{[1
]}

Raymond, CA ^{[1
]}

Storms, SA ^{[1
]}

Williford, DC ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

INSTRUMENTS, SCIENCE, AND METHODS FOR GEOSPACE AND PLANETARY REMOTE SENSING | 2004年 / 5660卷

关键词：

dawn; asteroids; gamma ray; spectroscopy;

D O I：

10.1117/12.578551

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Dawn is a NASA discovery mission that will explore the main belt asteroids (1) Ceres and (4) Vesta. Ceres and Vesta are among the oldest bodies in the solar system and represent very different evolutionary paths. By studying these ancient, complementary asteroids, we will answer fundamental questions about the early solar system and planetary formation processes. The Dawn payload consists of a Framing Camera (FC), a visual and infrared mapping spectrometer (VIR), and a Gamma Ray and Neutron Detector (GRaND). The instruments provide data needed to investigate the structure, geology, mineralogy, and geochemistry of the asteroids. GRaND provides the data for the geochemistry investigation, including maps of most major elements and selected radioactive and trace elements. An updated description of the GRaND instrument is given along with the expected performance of GRaND at Vesta and Ceres. Approaches to combine data from FC, VIR and GRaND are discussed.

引用

页码：107 / 116

页数：10

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