Why heavy particle decays more rapidly inside a barrier than that of a light particle?

05 May 2018 0 5K Report

It is the first time i have heard about the heavy and light particles of an oscillating wave inside a barrier if it is so? Then is there any answer to what are heavy and light particles inside a barrier ?

This is in ref to below link

http://web.thu.edu.tw/ghliu/www/0723/Ch8_2tunneling.pdf

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