Britannica
Sources used in this answer
How can scientists identify a new transuranium element when only a few atoms are produced?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
transuranium element
Modern version of the periodic table of the elements (printable).
When only a few atoms of a new transuranium element are produced, traditional chemical characterization is often impossible. In these instances, scientists identify the element using the following methods:
- Nuclear-Decay Systematics: The atomic number is deduced by observing the element's unique nuclear-decay patterns, which cannot be attributed to any known nuclides.1
- Parent-Daughter Relationships: Scientists analyze the decay chain to link the new element to known isotopes of lower atomic number. By tracing the radioactive decay back to a known "parent" or forward to a known "daughter," the identity of the new isotope can be established.1
- Production Method: The atomic number is inferred from the specific nuclear reaction used to create it, such as the energy of the bombarding particles and the nature of the target and projectile.1
- Recoil Collection: For elements 101 and heavier, product nuclei are separated from the target using a recoil collection method. The product nucleus is swept onto a substrate by helium gas or attracted via electrostatic potential, allowing it to be observed in isolation from the target.1