A Thin Cosmic Rain: Particles from Outer Space

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Harvard University Press, Nov 1, 2002 - History - 241 pages
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Enigmatic for many years, cosmic rays are now known to be not rays at all, but particles, the nuclei of atoms, raining down continually on the earth, where they can be detected throughout the atmosphere and sometimes even thousands of feet underground. This book tells the long-running detective story behind the discovery and study of cosmic rays, a story that stretches from the early days of subatomic particle physics in the 1890s to the frontiers of high-energy astrophysics today.

Writing for the amateur scientist and the educated general reader, Michael Friedlander, a cosmic ray researcher, relates the history of cosmic ray science from its accidental discovery to its present status. He explains how cosmic rays are identified and how their energies are measured, then surveys current knowledge and theories of thin cosmic rain. The most thorough, up-to-date, and readable account of these intriguing phenomena, his book makes us party to the search into the nature, behavior, and origins of cosmic rays—and into the sources of their enormous energy, sometimes hundreds of millions times greater than the energy achievable in the most powerful earthbound particle accelerators. As this search led unexpectedly to the discovery of new particles such as the muon, pion, kaon, and hyperon, and as it reveals scenes of awesome violence in the cosmos and offers clues about black holes, supernovas, neutron stars, quasars, and neutrinos, we see clearly why cosmic rays remain central to an astonishingly diverse range of research studies on scales infinitesimally small and large.

Attractively illustrated, engagingly written, this is a fascinating inside look at a science at the center of our understanding of our universe.

 

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Contents

1 The Early Days
1
2 Identifying Cosmic Rays
14
3 The Earths Magnetic Influence
36
4 Particles from the Sun
56
5 Cosmic Rays in the Galaxy
72
6 The Energy Spectrum
103
7 Ultrahigh Energies
117
8 Nuclear Clues
126
11 Cosmic Neutrinos
176
12 The Subnuclear World
188
13 Footprints and Souvenirs
206
14 Epilogue
222
Works Cited
227
Bibliographical Note
229
Acknowledgments
231
Index
233

9 The Origin of Cosmic Rays
141
10 Cosmic Electrons and Gamma Rays
161

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About the author (2002)

Michael W. Friedlander is Professor of Physics at Washington University in St. Louis.

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