Authors:B. J. Vieira, S. R. Biegalski, M. C. Freitas, and S. Landsberger
A set of 15 atmospheric aerosol samples was collected in an industrial area of Lisbon, Portugal and then analyzed by instrumental
neutron activation analysis (INAA). Both fine and coarse aerosol samples were collected during November and December 2001
on polycarbonate filters with Gent samplers. The INAA methodology utilized both thermal and epithermal neutron irradiations.
Compton suppressed and normal gamma-ray spectra were acquired simultaneously for each measurement and the elemental concentrations
of 30 elements were determined. Enrichment factors, wind speed comparison and receptor modeling techniques were applied to
obtain the different source contributions of the aerosols. Crustal, marine and anthropogenic sources were identified. The
anthropogenic elements have origin mainly in the area close to the sampling site (<5 km), with the exception of Ca and V.
A direct relationship was observed between the anthropogenic atmospheric aerosol concentrations and wind speed.
Authors:S. Landsberger, D. J. O'Kelly, S. Biegalski, S. O'Kelly, K. Foltz Biegalski, L. Welch, and L. Katz
In the past few years there has been renewed worldwide interest in the re-establishment of various nuclear and radiochemistry
disciplines in the hope of training the next generation of skilled researchers in this area. In the United States there continues
to be an acute shortage of MSc and PhD level trained students, particularly at the Department of Energy national laboratories.
As a result of this critical need the Department of Energy established a Radiochemistry Education Award Program (REAP) in
the late 1990's to address this issue. Several universities were awarded funding to establish various complimentary programs.
One of the main goals of the REAP at the University of Texas was to establish a web-based graduate level course with associated
labs and to have interactions with the national laboratories.
Authors:M. Freitas, A. Pacheco, M. Bacchi, I. Dionísio, S. Landsberger, J. Braisted, and E. Fernandes
In 2003–2004, several food items were purchased from large commercial outlets in Coimbra, Portugal. Such items included meats
(chicken, pork, beef), eggs, rice, beans and vegetables (tomato, carrot, potato, cabbage, broccoli, lettuce). Elemental analysis
was carried out through INAA at the Technological and Nuclear Institute (ITN, Portugal), the Nuclear Energy Centre for Agriculture
(CENA, Brazil), and the Nuclear Engineering Teaching Lab of the University of Texas at Austin (NETL, USA). At the latter two,
INAA was also associated to Compton suppression. It can be concluded that by applying Compton suppression (1) the detection
limits for arsenic, copper and potassium improved; (2) the counting-statistics error for molybdenum diminished; and (3) the
long-lived zinc had its 1115-keV photopeak better defined. In general, the improvement sought by introducing Compton suppression
in foodstuff analysis was not significant. Lettuce, cabbage and chicken (liver, stomach, heart) are the richest diets in terms
of human nutrients.
Authors:S. Landsberger, A. Plionis, S. Biegalski, K. Foltz-Biegalski, E. Schneider, D. O’Kelly, J. Braisted, S. O’Kelly, and L. Welch
Over the last three years we have developed a very robust nuclear and radiochemistry program at The University of Texas at
Austin. The cornerstone of support was the DOE Radiochemistry Educational Award Program (REAP) that was awarded from 2002–2005.
A second award for the period of 2005–2008 was just received. This award has enabled us to support many educational activities
from vanguard classroom instruction, to laboratory enhancements, to research activities at the graduate and undergraduate
levels. Both traditional radiochemistry and advanced topics in nuclear instrumentation have been supported. Various DOE university
programs, national lab funding and IAEA fellowship grants, have allowed the Nuclear and Radiation Engineering Program at the
University of Texas to be at the forefront of nuclear and radiochemistry educational and research activities and help secure
the next generation of needed expertise.