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Toward an international practical pressure scale: A proposal for an IPPS ruby gauge (IPPS-Ruby2020)

Journal Article · · High Pressure Research
At the 26th AIRAPT conference in 2017, a task group was formed to work on an International Practical Pressure Scale (IPPS). This report summarizes the activities of the task group toward an IPPS ruby gauge. We have selected three different approaches to establishing the relation between pressure (P) and ruby R1-line shift (Delta lambda) with three groups of optimal reference materials for applying these approaches. Using a polynomial form of the second order, the recommended ruby gauge (referred as Ruby2020) is expressed by: P[GPa]=1.87(+/- 0.01) x 10(3) (Delta lambda/lambda(0))[1 + 5.63(+/- 0.03)(Delta lambda/lambda(0))], where lambda(0) is the wavelength of the R1-line near 694.25 nm at ambient condition. In June of 2020, the Executive Committee of AIRAPT endorsed the proposed Ruby2020. We encourage high-pressure practitioners to utilize Ruby2020 within its applicable pressure range (up to 150 GPa), so that pressure data can be directly compared across laboratories and amended consistently as better scales emerge in the future.
Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA) - Office of Experimental Sciences (NA-113); National Science Foundation (NSF) - Directorate for Geosciences Division of Earth Sciences (GEO/EAR)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1660709
Journal Information:
High Pressure Research, Journal Name: High Pressure Research Journal Issue: 3 Vol. 40; ISSN 0895-7959
Country of Publication:
United States
Language:
English

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