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

Authors
JEFTIC J KINDLER U SPIERING H HAUSER A
Citation
J. Jeftic et al., 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, Measurement science & technology, 8(5), 1997, pp. 479-483
Citations number
19
Categorie Soggetti
Instument & Instrumentation",Engineering
Journal title
Measurement science & technology → ACNP
ISSN journal
09570233
Volume
8
Issue
5
Year of publication
1997
Pages
479 - 483
Database
ISI
SICI code
0957-0233(1997)8:5<479:HGCFPU>2.0.ZU;2-L
Abstract
A helium gas pressure cell for pressures up to 1 kbar (0.1 GPa) has be en developed in conjunction with a closed-cycle He refrigerator allowi ng variable temperatures between 15 and 300 K. Both cell and refrigera tor are equipped with optical windows suitable for photophysical measu rements, such as temperature- and pressure-dependent absorption spectr oscopy or laser flash photolysis. Examples of measurements on iron(II) spin-crossover systems are given. In these compounds, comparatively s mall external pressures induce significant changes in the thermodynami c equilibrium as well as in the relaxation dynamics.