Answers are grounded in this paper and cite their sources.
The specific heats of cerium magnesium nitrate and lanthanum magnesium nitrate have been measured in the temperature range 2 °K to 25 °K. These measurements show that there is an anomalous contribution to the specific heat of the cerium salt of the Schottky type with its maximum at 14.0 ± 0.5 °K. This corresponds to an energy splitting Δ/ k of 34 ± 1.5 degK between the first excited state and the ground state.
No takes yet. Share an insight, caveat, or question.
Christopher A. Bailey (1964) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: