Heat Capacity of Isotopically Enriched 28Si, 29Si and 30Si

TL;DR

This study measures the heat capacity of isotopically enriched silicon isotopes across a range of low temperatures, revealing how isotopic mass influences thermal properties and confirming theoretical predictions about Debye temperature dependence.

Contribution

It provides new experimental data on heat capacity for 28Si, 29Si, and 30Si and validates the theoretical relationship between isotopic mass and Debye temperature.

Findings

Heat capacity increases with isotopic mass.

Debye temperatures were accurately determined for each isotope.

Experimental results agree with theoretical models.

Abstract

The heat capacity of isotopically enriched 28Si, 29Si, 30Si samples has been measured in the temperature range between 4K and 100K. The heat capacity of Si increases with isotopic mass. The values of the Debye temperature for the three isotopic varieties of silicon have been determined. Good agreement with the theoretical dependence of the Debye temperature on isotopic mass has been found.