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University of Southern California


Faculty
 
Professor Darrell L. Judge

Professor, Physics
Director, Space Sciences Center
Building: SHS 270
Mail Code: 1341
Department: Physics
Division: LAS
Telephone: (213) 740-6340
Fax: (213) 740-6342
Email: djudge@usc.edu
URL:http://www.usc.edu/dept/physics/people/Faculty/djudge.html
Updated: June 8, 2007

Judge portrait photo

 

Professor Darrell L. Judge is a spectroscopist with broad interests in astrophysical problems and laboratory atomic and molecular physics. He is the principal investigator for the ultraviolet photometric experiments on board Pioneers 10 and 11. Professor Judge is also the principal investigator for a sounding rocket program in which the influence of the highly time dependent extreme ultraviolet solar flux on the photo-chemistry of planetary atmospheres is investigated. In addition to his space research program Professor Judge conducts a major laboratory research effort in which the fundamental properties of atomic and molecular systems are determined. This research is carried out primarily in the extreme ultraviolet and soft x-ray spectral regions, using electron storage ring synchrotron radiation, tunable dye lasers, and a variety of conventional light sources. The results obtained include the identification of atomic and molecular energy levels, dynamics of atomic systems, specific absolute fragmentation cross sections, Frank-Condon factors, electronic transition moments, multiphoton absorption cross sections, and the determination of atomic and molecular constants.

Recent Abstracts

1). SOLAR PHOTOIONIZATION AS A LOSS MECHANISM OF NEUTRAL INTERSTELLAR HYDROGEN IN INTERPLANETARY SPACE

1). AN OPTICS FREE SPECTROMETER FOR THE EXTREME-ULTRAVIOLET

3). TOTAL ION DESORPTION YIELDS OF H2O, D2O, CH3OH, CD3OD AND WATER-METHANOL MIXED ICES IRRADIATED AT 584 ANGSTROM

4). RARE-GAS OPTICS-FREE STABLE EXTREME-ULTRAVIOLET PHOTON SPECTROMETER FOR SOLAR-SYSTEM STUDIES

5). SOURCE - THE SOLAR ULTRAVIOLET-RADIATION AND CORRELATIVE EMISSIONS MISSION

6). NORMAL INCIDENCE SPECTROPHOTOMETER WITH HIGH-DENSITY TRANSMISSION GRATING TECHNOLOGY AND HIGH-EFFICIENCY SILICON PHOTODIODES FOR ABSOLUTE SOLAR EXTREME-ULTRAVIOLET IRRADIANCE MEASUREMENTS

7). HELIOSPHERIC HYDROGEN BEYOND 15 AU - EVIDENCE FOR A TERMINATION SHOCK

8). PHOTOABSORPTION AND PHOTOIONIZATION CROSS-SECTIONS OF GAS-PHASE GEH-4 AND RYDBERG STRUCTURES OF GEH-4 AND SIH-4

9). SOLAR-DRIVEN NEUTRAL DENSITY WAVES

10). THE ULTRAVIOLET-ABSORPTION SPECTRUM OF CO - APPLICATIONS TO PLANETARY-ATMOSPHERES

11). TIME-VARIABLE AND SPACE-VARIABLE STRUCTURES OF INTERSTELLAR GAS PASSING OVER THE HELIOSPHERE - CONSEQUENCES FOR THE INTERPLANETARY UV RESONANCE GLOW

 
 
    website last updated 10/03/2007