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A simple introduction to Science at ISIS
Robert McGreevy ISIS Facility, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, UK.
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To see small things – you need a big thing …
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What can neutrons and muons do?
’Neutrons (and muons) tell you where atoms are and what atoms do’
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Diamond Graphite Fullerene
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Neutron Diffraction
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Inelastic Neutron Scattering
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Momentum – k (velocity) Energy - E Particle
Time of flight method Momentum – k (velocity) Energy - E Particle Wave Wavelength – λ (length scale) 1000 m/s 20 m μs 20 ms 10-10 m
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Neutrons see the world in a unique way
… to hydrogenase From hydrogen … Length and time scales 10-11 – 10-6 m – 10-6 s
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Neutrons see the world in a unique way
… to hydrogenase From hydrogen … Length and time scales 10-11 – 10-6 m – 10-6 s
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Neutrons see the world in a unique way
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Neutrons see the world in a unique way
Penetration Large samples, buried interfaces, non-destructive
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Neutrons see the world in a unique way
Magnetism The neutron has a magnetic moment but no charge
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= + + Neutrons see the world in a unique way
Sensistivity and selectivity Isotopic substitution/contrast variation
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Neutrons see the world in a unique way
a(4K) = (2) Å 18th order spherical harmonic c18,1 = ; c18,2 = 0.077 Precision Weak interaction, simple interaction
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Crystallography Powder diffraction HRPD POLARIS GEM HiPr (ROTAX) WISH (TS2) Single crystal diffraction SXD Engineering diffraction ENGIN-X
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Single crystal diffraction - SXD
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Anticancer drug studied on SXD in 2005
C. K. Broder et al.
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Anticancer drug studied on SXD in 2005
C. K. Broder et al.
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