Pb207ään

Pb207ään refers to the isotope of lead with a mass number of 207. Lead-207 is a stable isotope and is the most abundant naturally occurring isotope of lead, making up approximately 22.1% of the element's natural abundance. This isotope is one of the four stable isotopes of lead, alongside Pb-204, Pb-206, and Pb-208. Its nucleus contains 82 protons and 125 neutrons.

The stability of Pb-207 is a consequence of its nuclear structure, which falls within the "island of stability" for certain isotopes. It is produced through the radioactive decay of other isotopes, notably bismuth-209, which undergoes extremely slow alpha decay to form lead-207. This process is significant in radiogenic dating, though the half-life is so long that it is not typically used for geological timescales.

Lead-207 plays a role in various scientific contexts, including nuclear physics research and in the study of the abundance of lead isotopes in different materials. Its presence and ratios are often analyzed in environmental samples and archaeological artifacts to understand their origin and history. The properties of lead-207 are crucial for understanding the overall behavior and characteristics of the element lead.