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Mössbauer spectroscopy on europium and summary


Mössbauer spectroscopy on tin, antimony and tellurium
Norman Greenwood Scientist
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We were also in tin-119, which I talked to you about a moment ago... corrected some mistakes in the literature about the change in size, one of the things which happens when the nucleus gets excited it either expands or contracts so it has either a positive or a negative sign of change, ΔR/R, and that we corrected for tin but the ruthenium was one good one. Then thinking again of tin if one goes further to the right of the periodic table we find that there is after tin... there is antimony and antimony-125 is a Mössbauer nucleus. We did a lot of work on antimony and tellurium, the next one, so there was a sequence there. The antimony and tellurium were both good isotopes though because of quadrupole effects the antimony one had a broad line so there was some difficulty there.

Norman Greenwood (1925-2012) was born in Australia and graduated from Melbourne University before going to Cambridge. His wide-ranging research in inorganic and structural chemistry made major advances in the chemistry of boron hydrides and other main-group element compounds. He also pioneered the application of Mössbauer spectroscopy to problems in chemistry. He was a prolific writer and inspirational lecturer on chemical and educational themes, and held numerous visiting professorships throughout the world.

Listeners: Brian Johnson

Professor Brian FG Johnson FRS, FRSE, FRS Chem, FAcad Eu, FAS. Professor of Inorganic Chemistry University of Edinburgh 1991-1995, Professor of Inorganic Chemistry University of Cambridge 1995-2005, Master Fitzwilliam College Cambridge 1999-2005. Research interests include studies of transition metal carbonyls, organometallic chemistry, nano- particles and homogeneous catalysis. Professor Johnson is the author of over 1000 research articles and papers.

Tags: Mössbauer spectroscopy

Duration: 1 minute, 15 seconds

Date story recorded: May 2011

Date story went live: 25 November 2011