Complex sentence: The best way to test for (and measure) many alpha emitters is to use alpha-particle spectroscopy as it is common to place a drop of the test solution on a metal disk which is then dried out to give a uniform coating on the disk.
Split into simpler sentences: The best way to test for (and measure) many alpha emitters is to use alpha-particle spectroscopy. It is common to place a drop of the test solution on a metal disk which is then dried out to give a uniform coating on the disk.