one square on the chart of nuclides will list the modes of decay and then right to that symbol it will list the energy. But sometimes there is also a capital "E-","E+", or "E" at the bottom of the square (in addition) which ALSO references an energy. WHAT IS THE DIFFERENCE between these two energy references???
Here you go I'll do part of your research for you.
http://www.nndc.bnl.gov/chart/help/index.jsp#screensize
and here too,...
(http://www.pstcc.edu/departments/natural_behavioral_sciences/Web%20Physics/E2120D1016.gif)
http://www.pstcc.edu/departments/natural_behavioral_sciences/Web%20Physics/Expm%2010.htm
(it is soooo tempting to post an "and here:,...and here,....and here,....", but I digress) :P ;) :) 8)