NANOPOLIS - Multimedia Education and Courses in Nanotechnology

Multimedia Education and Courses in Nanotechnology.

Online Multimedia Resource

Online Multimedia Library

Offline Multimedia Resources

NANOBIOTECHNOLOGY
CD-ROM format

NANOTECHNOLOGY
Educational Topics
CD-ROM or Downloadable format

NEUTRONS
Educational Topics
CD-ROM or Downloadable format

SYNCHROTRON LIGHT
Educational Topics
CD-ROM format

Nanotech Highlights

Prof. Gary Bowlin
Virginia Commonwealth University,USA

Nanotech Reviews

Neutrons Highlights

Prof. Roger Pynn
Indiana University and Spallation Neutron Source, USA

Nanopolis Partner Institutes

Neutrons Reviews

NANOPOLIS Headfigures

Dr. Alain Filhol
Institut Laue-Langevin,
Grenoble, France

Nanopolis Partner Institutes

Dr. Sandra Biedron
Argonne National Laboratory
USA

Partner Research Institutes' Coordinators

Dr. Sandra Ribeiro
Canadian Light Source

Dr. Dominique Cornuejols
European Synchrotron Radiation Facility

Dr. Karen Diederichsen
Hahn-Meitner-Institut Berlin

Dr. Alain Filhol
Institut Laue-Langevin

Prof. Roger Pynn
Indiana University and Spallation Neutron Source

Dr. Alain Menelle
Laboratoire Lion Brillouin (CEA/CNRS)

Dr. Marie-Pauline Gacoin
SOLEIL Synchrotron

"Exploring matter with Neutrons" multimedia encyclopedia
Educational excerpts

Display the full structure of the encyclopedia

Neutron Sources »Cosmic neutrons

Science

Tools of neutron physics

Applications - Fundamental Research

Applications - Applied Research

Applications - Industry and Medicine

Neutron Facilities

Industrial Profiles

Cosmic neutrons
Earth receives an intense flux of cosmic rays on a permanent basis. They are mainly high-energy protons coming from the sun and numerous other galactic sources.

Less than 1% of these particles reach the ground, because on their descent they crash into and break the nuclei of atmospheric atoms, generating particle bursts. At sea level, these bursts span several square kilometers and have a significant neutron content (27 neutrons/cm2/hour).

According to John M. Carpenter, Earth atmosphere is the equivalent of a 310MW spallation source. It generates much more neutrons per second than is generated by artificial means - but they are diluted in an immense volume.

This flux of cosmic neutrons is enough to damage electronic devices, and the industry treats the problem very seriously.

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This multimedia resource is a sample excerpt from the Exploring matter with Neutrons CD-ROM, 2nd tome of the NANOPOLIS™ encyclopedia series. The CD-ROM is available for purchase.