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DE2003807886

Publication Date	2002
Personal Author	Paul, R. L.; Chen-Mayer, H. H.; Myneni, G. R.
Page Count	15
Abstract	The presence of trace amounts of hydrogen in niobium is believed to have a detrimental effect on the mechanical and superconducting properties. Unfortunately, few techniques are capable of measuring hydrogen at these levels. We have developed two techniques for measuring hydrogen in materials. Cold neutron prompt gamma-ray activation analysis (PGAA) has proven useful for the determination of hydrogen and other elements in a wide variety of materials. Neutron incoherent scattering (NIS), a complementary tool to PGAA, has been used to measure trace hydrogen in titanium. Both techniques were used to study the effects of vacuum heating and chemical polishing on the hydrogen content of superconducting niobium.
Keywords	Niobium Superconductors Hydrogen Impurities Chemical polishing Activation Trace amounts Vacuum systems
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	National Inst. of Standards and Technology (CSTL), Gaithersburg, MD. Analytical Chemistry Div.; Department of Energy, Washington, DC.; Jefferson Lab., Newport News, VA.
Supplemental Notes	Prepared in cooperation with Jefferson Lab., Newport News, VA. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200321

Determination of Hydrogen in Niobium by Cold Neutron Prompt Gamma-Ray Activation Analysis and Neutron Incoherent Scattering.

Determination of Hydrogen in Niobium by Cold Neutron Prompt Gamma-Ray Activation Analysis and Neutron Incoherent Scattering.
DE2003807886

Publication Date	2002
Personal Author	Paul, R. L.; Chen-Mayer, H. H.; Myneni, G. R.
Page Count	15
Abstract	The presence of trace amounts of hydrogen in niobium is believed to have a detrimental effect on the mechanical and superconducting properties. Unfortunately, few techniques are capable of measuring hydrogen at these levels. We have developed two techniques for measuring hydrogen in materials. Cold neutron prompt gamma-ray activation analysis (PGAA) has proven useful for the determination of hydrogen and other elements in a wide variety of materials. Neutron incoherent scattering (NIS), a complementary tool to PGAA, has been used to measure trace hydrogen in titanium. Both techniques were used to study the effects of vacuum heating and chemical polishing on the hydrogen content of superconducting niobium.
Keywords	Niobium Superconductors Hydrogen Impurities Chemical polishing Activation Trace amounts Vacuum systems
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	National Inst. of Standards and Technology (CSTL), Gaithersburg, MD. Analytical Chemistry Div.; Department of Energy, Washington, DC.; Jefferson Lab., Newport News, VA.
Supplemental Notes	Prepared in cooperation with Jefferson Lab., Newport News, VA. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200321