# An Associated Particle Imaging System for Soil-Carbon Measurements

## TL;DR

This paper demonstrates an Associated Particle Imaging system capable of measuring soil carbon and other elements with centimeter-scale 3D resolution using neutron inelastic scattering, showing promising initial results.

## Contribution

First experimental demonstration of an APIS for soil carbon measurement with multi-element detection and high spatial resolution.

## Key findings

- Successful detection of carbon in soil sample
- Achieved several centimeters 3D spatial resolution
- Measured distribution of multiple elements in soil

## Abstract

We present first results from experimental data showing the capabilities of an Associated Particle Imaging system to measure carbon in soil and other elements. Specifically, we present results from a pre-mixed soil sample containing pure sand (SiO$_2$) and 4% carbon by weight. Because the main isotopes of all those three elements emit characteristic high-energy gamma rays following inelastic neutron scattering, it is possible to measure their distribution with our instrument. A 3D resolution of several centimeters in all dimensions has been demonstrated.