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Bill Webber
Professor Emeritus
Office: 205 Astronomy
Phone: (575)646-2007
Fax: (575)646-1602
 
E-mail: bwebber
(append "@nmsu.edu")
 
Photo
Ph.D.University of Iowa,1957
B.S. Coe College, 1951

Research

Dr. Webber's research is focused on high energy cosmic ray physics. He is directly involved with cosmic ray experiments on both the Pioneer 10 and Voyager 1 & 2 spacecraft. These spacecraft are the first manmade objects to leave the solar system. Dr. Webber has a wide range of interests, including studies of cosmic rays in the heliosphere using the Pioneer and Voyager spacecraft, H and He isotope studies and anti-proton measurements - I MAX balloon experiment, measurements of nuclear cross sections using liquid H targets at the SATURNE accelerator in France for Big Bang nucleosynthesis, Monte-Carlo simulations of cosmic ray nucleons and electrons in the Milky Way, studies of cosmic ray elemental and isotopic composition on Voyager, the Gamma-Ray Distribution in the Milky Way, and Gamma Ray Bursts. Dr. Webber is retired, but he remains a prolific researcher and continues to publish several scientific papers per year.

Currently Dr. Webber is working with Voyager I data in a search for the "solar shock", where the sun's solar wind slams into the interstellar gas between the stars.

Publications

Selected Publications...

The Disappearance of Anomalous Protons at Voyager 1 and Voyager 2 in the Outer Heliosphere between 1998 and 2002
Webber, W.R., McDonald, F.B., Cummings, A.C., Stone, E.C., Heikkila, B., & Lal, N. 2006, JGR, 111, A08107

Large Global Transient Decreases of >70 MeV Cosmic Rays Observed at Voyager 1 and Voyager 2 in the Outer Heliosphere in 2001-2003: The Onset of Heliospheric 2-3 kHz Radio Emission and the Distance to the Heliopause
Webber, W.R., & Lockwood, J.A. 2005, JGR, 109, A06107

Updated Formula for Calculating Partial Cross Sections for Nuclear Reactions of Nuclei with Z <= 28 and E > 150 MeV/Nucleon in Hydrogen Targets
Webber, W.R., Soutoul, A., Kish, J.C., & Rockstroh, J.M. 2003, ApJS, 144, 153

Voyager Measurements of the Charge and Isotopic Composition of Cosmic Ray Li, Be, and B Nuclei and Implications for Their Production in the Galaxy
Webber, W.R., Lukasiak, A., & McDonald, F.B. 2002, ApJ, 568, 210

Interstellar Absorption of the Galactic Polar Low-Frequency Radio Background Synchrotron Spectrum as an Indicator of Clumpiness in the Warm Ionized Medium
Peterson, J.D., & Webber, W.R. 2002, ApJ, 575, 217

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