Producing and quantifying enriched para-H2

Brian A Tom; Siddhartha Bhasker; Yuki Miyamoto; Takamasa Momose; Benjamin J McCall

doi:10.1063/1.3072881

Producing and quantifying enriched para-H2

Rev Sci Instrum. 2009 Jan;80(1):016108. doi: 10.1063/1.3072881.

Authors

Brian A Tom¹, Siddhartha Bhasker, Yuki Miyamoto, Takamasa Momose, Benjamin J McCall

Affiliation

¹ Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.

PMID: 19191469
DOI: 10.1063/1.3072881

Abstract

The production of enriched para-H(2) is useful for many scientific applications, but the technology for producing and measuring para-H(2) is not yet widespread. In this note and in the accompanying auxiliary material, we describe the design, construction, and use of a versatile standalone converter that is capable of producing para-H(2) enrichments of up to > or = 99.99% at continuous flow rates of up to 0.4 SLM. We also discuss para-H(2) storage and back conversion rates, and improvements to three techniques (thermal conductance, NMR, and solid hydrogen impurity spectroscopy) used to quantify the para-H(2) enrichment.