Toward an international practical pressure scale: A proposal for an IPPS ruby gauge (IPPS-Ruby2020). Issue 3 (2nd July 2020)

• Record Type: Journal Article
• Authors: Shen, Guoyin; Wang, Yanbin; Dewaele, Agnes; Wu, Christine; Fratanduono, Dayne E.; Eggert, Jon; Klotz, Stefan; Dziubek, Kamil F.; Loubeyre, Paul; Fat'yanov, Oleg V.; Asimow, Paul D.; Mashimo, Tsutomu; Wentzcovitch, Renata M. M.
• Is Part Of: High pressure research. Volume 40:Issue 3(2020)
• Page Start: 299
• Page End: 314
• Publication Date: 2020-07-02
• Subjects: International practical pressure scale -- ruby gauge -- equations of state; High pressure (Science) -- Periodicals; High pressure (Technology) -- Periodicals; 536.41
• DOI: 10.1080/08957959.2020.1791107
• Languages: English
• ISSNs: 0895-7959

Abstract

ABSTRACT: At the 26 th 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 ( Δλ ) 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 [ G P a ] = 1.87 ( ± 0.01 ) × 10 3 Δ λ λ 0 1 + 5.63 ( ± 0.03 ) Δ λ λ 0, where λ0 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.