Basics of Carbon Dating

Welcome! I am really looking forward to exploring the science behind carbon dating with you.

Before we dive into the physics of how we can trace the age of ancient organic materials, I would love to learn a little bit more about what brings you here today.

I'm just curious and learning about this for fun!

It is wonderful to have you here! Learning for the sheer joy of curiosity is the absolute best way to explore science, so let's jump right in.

The Cosmic Spark

Our story doesn't actually start on Earth, but way up in the highest reaches of our atmosphere. Every single day, our planet is constantly showered by —high-energy particles streaming in from deep space. When these cosmic rays collide with gases in the upper atmosphere, they knock loose tiny subatomic particles called neutrons. Think of these neutrons like rogue, high-speed billiard balls zooming through a crowded room. Eventually, one of these neutrons slams directly into a stable, everyday atom, which is the most abundant gas in our air. When that collision happens, the nitrogen atom ejects a proton and absorbs the neutron. In an instant, that stable nitrogen atom is transformed into a radioactive, unstable carbon atom known as carbon-14 (or C-14).

A nuclear reaction flow showing a cosmic ray neutron colliding with a nitrogen-14 atom to produce carbon-14 and a free proton.

I have created a simple visualization above to help you picture this celestial collision that births carbon-14.

Next, we will look at how this freshly created carbon-14 makes its way out of the sky and directly into living things like you and me. Shall we keep going?