Trees as Filters of Radioactive Fallout from the Chernobyl Accident
  This paper is a copy of an unpublished study of the filtering effect of red maple trees (acer rubrum) on fission product fallout near Binghamton, NY, USA following the 1986 Chernobyl accident. The conclusions of this work may offer some insight into what is happening in the forests exposed to fallout from the Fukushima Daiichi Nuclear Plant accident. This posting is in memory of Noel K. Yeh. 
James D. Brownridge and Noel K. Yeh
physics.pop-ph physics.soc-ph