FIVE YEARS EXPERIENCE OF 90Sr AND 137Cs HERBAGE TO MILK TRANSFER UNDER FIELD CONDITIONS

Vertical distribution of 238Pu, 239(40)Pu, 241Am, 90Sr and 137Cs in Austrian soil profiles

“…The observation, that the 137 Cs and 90 Sr maxima are nearer to the soil surface compared to the plutonium isotopes, can be due to different behaviour of the respective nuclides in the soil and/or reflects the fact that the 137 Cs and 90 Sr deposition took place later than the plutonium deposition: while the Pu isotopes stem from the global bomb fallout in the 1950ies and 1960ies, the source of 137 Cs and 90 Sr was the Chernobyl accident in1986. This is verified by the 90 Sr/ 137 Cs activity ratios: while in bomb fallout the 90 Sr/ 137 Cs activity ratio is 0.61 [26], after Chernobyl, raBrought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 5/30/15 1:34 PM tios between 0.012 and 0.017 were found in surface air [3]; the ratio in soil samples is expected to be higher by a factor of 2 [26], giving (2.4-3.4) × 10 −2 . This is comparable to our values presented here; the higher values especially in the deeper layers reflect an older contribution from the global fallout.…”

Metals Concentration and Accumulation in Several Aquatic Macrophytes

“…(15), the c.F. may be calculated when in an organism the concentration of a certain element is or is not at equilibrium level with that in the water; the fi rst case is described as the "real C.F."…”

“…the concentration factor (c.F.) was used as a quantitative measurement for the comparison of the concentration of an element in an aquatic organism with that in the water where the organisms lives (15,42). it was calculated as the ratio between the concentration of the element in the organism (related to the wet weight) and in the water.…”