# A new precision measurement of the {\alpha}-decay half-life of 190Pt

## TL;DR

This study presents a precise laboratory measurement of the alpha-decay half-life of 190Pt, achieving a 3.2% uncertainty, which aligns well with previous geological estimates.

## Contribution

The paper provides a new, highly accurate laboratory measurement of 190Pt's alpha-decay half-life using a low background ionisation chamber, improving precision over prior estimates.

## Key findings

- Half-life of 190Pt measured as (4.97±0.16)×10^11 years
- Measurement uncertainty reduced to 3.2%
- Results agree with geological comparison methods

## Abstract

A laboratory measurement of the $\alpha$-decay half-life of $^{190}$Pt has been performed using a low background Frisch grid ionisation chamber. A total amount of 216.60(17) mg of natural platinum has been measured for 75.9 days. The resulting half-life is $(4.97\pm0.16)\times 10^{11}$ years, with a total uncertainty of 3.2%. This number is in good agreement with the half-life obtained using the geological comparison method.