Protactinium-Generator-Rapid-52-2704-P-This-Protactinium-generator-is-ideal-for-demonstrating-radioactive-decay-The-half-life-of-the-isotope-is-short-enough-for-students-to-complete-the-decay-curve-within-a-single-lesson-&-is-perfect-for-use-with-a-datalogger-&-GM-tube-sensor-or-a-standard-GM-tube-&-counter-P-P-The-generator-is-completely-sealed-in-a-leakproof-enclosure-&-consists-of-uranyl-nitrate-&-an-organic-solvent-These-settle-into-two-distinct-layers-but-when-shaken-toge