Not astronomy! This is actually single-crystal diffuse x-ray scattering from an important industrial isomerization catalyst called mordenite, where the L = 0 plane of reciprocal space was reconstructed using portions from over 1000 CCD X-ray camera images. The broad patches, open diamonds, and star-shaped distributions are clues that reveal a complex architecture of framework defects with implications for this zeolite’s unusual adsorptive and catalytic properties.
This is a mosaic of solar eclipse images secured on May 20, 2012 by Dr. Michael D. Joner. The individual observations were made between 6:59 and 8:06pm MDT a couple of miles northwest of Kanarraville, Utah on the center line of this annular solar eclipse. The entire solar photosphere was not blocked by the passage of the Moon for this eclipse. The result was an annular eclipse due to the fact that the Moon was close to apogee and thus not large enough in the sky to cover the entire Sun. Areas of southern Utah enjoyed perfect weather in addition to being ideally located to view the eclipse well before sunset.
Structures based on stacking sequences of Gd5T4 slabs are determined by the directionality of interslab T-T dimers. These include giant-magnetocaloric compounds like Gd5Si2Ge2. In the T = (Si,Bi) system, substituting Si for Bi not only leads to the complete electronic/geometric cleavage of the interslab dimers, it removes the directionality of residual nearest-slab interactions, which facilitates novel stacking sequences and extensive stacking faults.
BYU physics researchers use some of the world's brightest x-ray and neutron sources to study the atomic structure and dynamics of advanced materials like superconductors and piezoelectrics. At the Spallation Neutron Source at Oak Ridge National Laboratory, accelerator-driven proton pulses bombard a liquid-mercury target, knocking high-energy neutrons from the target nuclei, which are then slowed in a moderator, collimated into beams, and scattered from material samples.
BYU physics researchers use some of the world's brightest x-ray and neutron sources to study the atomic structure and dynamics of advanced materials like superconductors and piezoelectrics. At the Advanced Photon Source at Argonne National Laboratory, electrons travel around a one-kilometer synchrotron ring at nearly the speed of light, emitting high-energy tangential Bremsstrahlung x-rays that are collimated into beams and scattered from material samples.
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25 July, Monday
Elizabeth Jeffery Kraczek and Mike Joner recently published an article titled "Observing Globular Cluster RR Lyrae Variables with the BYU West Mountain Observatory" in The Journal of the American Association of Variable Star Observers. Click on the image above to read it.
M2 9: Wings of a Butterfly Nebula : Are stars better appreciated for their art after they die? Actually, stars usually create their most artistic displays as they die. In the case of low-...
This photograph and Description come from NASA's Astronomy Picture of the Day web site.