We have developed a high-resolution monochromator (HRM) for the measurement of nuclear resonant scattering (NRS)
of synchrotron radiation by Te-125 at 35.49 keV using the backscattering of sapphire (9 1 -10 68). HRMs for nuclei with
excitation energies less than 30 keV have been successfully developed using high angle diffractions by silicon crystals.
Nearly perfect silicon crystal, however, is not suitable for high efficient HRMs at higher energy regions because the
symmetry of the crystal structure is high and the Debye-temperature is low. Therefore, we used high quality synthetic
sapphire crystal, which has low symmetry of crystal structure and high Debye-temperature. The temperature of the
crystal was precisely controlled around 218 K to diffract synchrotron radiation with a Bragg angle of π/2 - 0.52 mrad.
Energy was tuned by changing the crystal temperature under the condition of constant diffraction angle. Energy
resolution was measured by detecting nuclear forward scattering by Te-125 in enriched TeO2. The relative energy
resolution of 2.1×10-7 is achieved, that is 7.5 meV in energy bandwidth. This HRM opens studies on element-specific
dynamics and electronic state of substances containing Te-125.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.