6533b7d0fe1ef96bd125b787
RESEARCH PRODUCT
Helium gas pressure cell for pressures up to 1 kbar (0.1 GPa) in conjunction with the cold head of a closed-cycle He refrigerator
Jelena JefticHartmut SpieringAndreas HauserUeli Kindlersubject
Materials scienceAbsorption spectroscopyThermodynamic equilibriumApplied MathematicsConjunction (astronomy)Refrigerator carThermodynamicsLaserlaw.inventionlawddc:540Head (vessel)Relaxation (physics)Flash photolysisInstrumentationEngineering (miscellaneous)description
A helium gas pressure cell for pressures up to 1 kbar (0.1 GPa) has been developed in conjunction with a closed-cycle He refrigerator allowing variable temperatures between 15 and 300 K. Both cell and refrigerator are equipped with optical windows suitable for photophysical measurements, such as temperature- and pressure-dependent absorption spectroscopy or laser flash photolysis. Examples of measurements on iron(II) spin-crossover systems are given. In these compounds, comparatively small external pressures induce significant changes in the thermodynamic equilibrium as well as in the relaxation dynamics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-05-01 |