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<h1 style='background:white'><span style='font-size:20.0pt;font-family:"Arial","sans-serif"'>Quantum
leap for ISIS second target station<o:p></o:p></span></h1>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Friday
08 January 2010 </span><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p>

<p style='background:white'><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>First
published science results from new UK neutron source support Newton’s ideas and
quantum theory <o:p></o:p></span></b></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Scientists
have used the UK’s newest major science facility to finally make the connection
between the reflection of particles and waves as required by quantum mechanics.
The phenomenon is a long established theory, but has not until now been seen.
The result is the first to be published from the £200 million second target
station recently opened at the ISIS Neutron Source in Oxfordshire and appears
online today (January 8 2010) at Physical Review Letters. Whilst the discovery
currently lies in the realm of pure physics, these results may initiate new
developments in electronics, complementing the wave equivalent already used for
photonics and metrology.<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>A
team led by Rob Dalgliesh and Sean Langridge from the Science and Technology
Facilities Council’s ISIS facility and Victor de Haan from the Delft University
of Technology (Netherlands) has proved experimentally for the first time that
particles (in this case, neutrons) slide along a surface before they are
reflected. This means that particles are reflected from a different point to the
one where they arrived.<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>The
spatial shift of a reflection was first suggested by Isaac Newton in the 17th
century.  Later in 1947 Goos and Hänchen used light to provide
experimental evidence of Newton’s suspicions and so was born the 
”Goos-Hänchen shift”. The recent discovery from work at ISIS not only supports
the ideas and work of Newton, Goos and Hänchen, but also proves that when
particles are reflected they behave in exactly the same way as light, as
predicted from quantum theory.<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>”Our
results show that particles, in this case neutrons, behave in exactly the same
way as light when they are reflected,” says Professor Sean Langridge, an STFC
research fellow at ISIS. “The capabilities of the new Offspec instrument that
we have built at the ISIS second target station have allowed us to see this at
the quantum level for the first time. The results provide us with further
experimental evidence of the correctness and beauty of quantum mechanics and
that ideas ranging from Newton to our present understanding of quantum
phenomena are well founded,” he said.<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>The
experiment took place at the new second target station at the ISIS Neutron
Source in Oxfordshire on the Offspec neutron instrument. The result was
achieved by shining a beam of polarised neutrons onto a film of magnetic
material and observing the minuscule change in polarisation after reflection.
This incredible sensitivity was only possible through the development of the
Offspec instrument, a collaboration between ISIS and the Delft University of
Technology.<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>“This
unique instrument as well as the first publication is the result of outstanding
cooperation between the ISIS team and researchers from the Reactor
Institute at Delft,” said Professor Tim van de Hagen, Director of the
Reactor Institute Delft.<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>The
capabilities of the instruments inside the second target station enabled the
scientists to see in fine detail, and for the first time anywhere in the world,
how such subtle effects seen in the reflection of light are reproduced by
particles at the quantum level.<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>“It
is extremely exciting to see the first results published from the science
programme at the ISIS second target station,” says Dr Andrew Taylor, Director
of ISIS. “This is the first of many important results from the new instruments.
And as well as pure science, they are also allowing us to contribute towards a
wide range of contemporary global science challenges.”<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>See
also:
http://www.isis.stfc.ac.uk/news/2010/quantum-leap-for-isis-second-target-station9576.html
<o:p></o:p></span></p>

<h1 style='margin:0cm;margin-bottom:.0001pt;line-height:15.6pt'><span
style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Observation of the Goos-Hänchen
Shift with Neutrons<o:p></o:p></span></h1>

<p style='margin:0cm;margin-bottom:.0001pt;line-height:18.0pt'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a
href="http://publish.aps.org/search/field/author/de_Haan_Victor_O"><span
style='color:windowtext;border:none windowtext 1.0pt;padding:0cm;text-decoration:
none'>Victor-O. de Haan</span></a>,<span class=apple-converted-space> </span><a
href="http://publish.aps.org/search/field/author/Plomp_Jeroen"><span
style='color:windowtext;border:none windowtext 1.0pt;padding:0cm;text-decoration:
none'>Jeroen Plomp</span></a>,<span class=apple-converted-space> </span><a
href="http://publish.aps.org/search/field/author/Rekveldt_Theo_M"><span
style='color:windowtext;border:none windowtext 1.0pt;padding:0cm;text-decoration:
none'>Theo M. Rekveldt</span></a>,<span class=apple-converted-space> </span><a
href="http://publish.aps.org/search/field/author/Kraan_Wicher_H"><span
style='color:windowtext;border:none windowtext 1.0pt;padding:0cm;text-decoration:
none'>Wicher H. Kraan</span></a>, and<span class=apple-converted-space> </span><a
href="http://publish.aps.org/search/field/author/van_Well_Ad_A"><span
style='color:windowtext;border:none windowtext 1.0pt;padding:0cm;text-decoration:
none'>Ad A. van Well</span></a><span class=apple-converted-space> (Delft)</span><br>
<a href="http://publish.aps.org/search/field/author/Dalgliesh_Robert_M"><span
style='color:windowtext;border:none windowtext 1.0pt;padding:0cm;text-decoration:
none'>Robert M. Dalgliesh</span></a><span class=apple-converted-space> </span>and<span
class=apple-converted-space> </span><a
href="http://publish.aps.org/search/field/author/Langridge_Sean"><span
style='color:windowtext;border:none windowtext 1.0pt;padding:0cm;text-decoration:
none'>Sean Langridge</span></a><span class=apple-converted-space> (ISIS)</span><br>
<b><span style='color:#323232'>URL:</span></b><span style='color:#323232'>http://link.aps.org/doi/10.1103/PhysRevLett.104.010401<o:p></o:p></span></span></p>

<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#323232'>DOI:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#323232'>10.1103/PhysRevLett.104.010401<o:p></o:p></span></p>

<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#323232'>PACS:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#323232'>03.75.Be, 03.65.Ta, 03.75.Dg, 42.50.Xa<o:p></o:p></span></p>

<p style='background:white'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";
color:#364780'><o:p> </o:p></span></p>

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