Armel Le Bail wrote:
> Have new neutron
> powder patterns been done on the magnesium diboride superconductor
> yet (or derivatives, if any), or B absorption will be a too big
> problem ?
Yes, neutron absorption by boron is a potential problem, however use of
11B in place of natural abundance boron eliminates the absorption. This
isotope is available fairly readily. And yes, the measurements have been
done.
People contemplating neutron experiments may want to estimate absorption
using http://www.ncnr.nist.gov/xtal/neutron.html
Brian
News Flash: The unscheduled mantainence for the NIST reactor has been
postponed until our scheduled upgrade in August. We plan to resume
operations in about 2 weeks.
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Brian H. Toby, Ph.D. Leader, Crystallography Team
[EMAIL PROTECTED] NIST Center for Neutron Research, Stop 8562
voice: 301-975-4297 National Institute of Standards & Technology
FAX: 301-921-9847 Gaithersburg, MD 20899-8562
http://www.ncnr.nist.gov/xtal
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