Abstract
Abstraet Sargent curves have been plotted for the isotopes of atomic numbers between 29 and 33 using the results obtained by us. The curves fit better to the Fermi's theory than K-U. The same results are also obtained in the study of Sargent curves for natural radioactive elements and for very light elements A fact, is also pointed out that. if the Sargent plots are made for all elements on the same diagram, a very clear front is produced A brief discussion for it is also given