Search Results

You are looking at 1 - 3 of 3 items for

  • Author or Editor: C. C. Rousseau x
  • Refine by Access: All Content x
Clear All Modify Search


In order to determine traces of boron, silicon and sulfur, B(18O, x)27Mg, Si(18O, x)43Sc and S(18O, x)47V reactions have been investigated between 15 and 44MeV. At 34 MeV, only a few of the systematically identified nuclear interferences produce27Mg and the detection limit is 30ng boron for a 10 minute irradiation with a 0.3μA·cm−2 oxygen-18 beam. Silicon analysis has shown nuclear interferences from Al, P and K; interference-free detection limit is 80 ng silicon for an hour irradiation with a 0.4 μA·cm−2 beam at 39 MeV. There is no nuclear interference for the sulfur determination and the detection limit is 5 ng sulfur for a 30 minutes irradiation with a 0.5 μA·cm−2 beam at 39 MeV. Thus a selective and sensitive sulfur determination can be achieved.

Restricted access
Periodica Mathematica Hungarica
Authors: P. Erdős, R. J. Faudree, C. C. Rousseau, and R. H. Schelp

Let denote the class of all graphsG which satisfyG→(G 1,G 2). As a way of measuring minimality for members of, we define thesize Ramsey number ř(G 1,G 2) by.

Restricted access
Restricted access