Please explain the following phenomena in X-Ray Diffraction. Why does the background intensity of an X-ray spectrum decrease with 2θ? If diffraction peaks of a crystalline solid shift to the high 2θ direction by internal stress, is this tensile or compressive stress?
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- Please explain the following phenomena in X-Ray Diffraction.
- Why does the background intensity of an X-ray spectrum decrease with 2θ?
- If diffraction peaks of a crystalline solid shift to the high 2θ direction by internal stress, is this tensile or compressive stress?
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- Calculate the wavelength corresponding to an electron with the energy of 94 eV (kiloelectronvolt). Give your answer in Angstrom (10-10 m, for example, if the answer is 1.6x10-10 m, then write 1.6 as your answer). This should give you a good idea why one can use a crystal lattice with an average interatomic distance of around 10-10 m to observe electron diffraction.Please help me answer the following. The laser = 759 nm, and the diffraction grating is 4.5 cmNeed help
- At room temperature, the diffractogram of a cubic material with lattice parameter of 10Å presents a peak at 2θ = 20o. At a higher temperature, the lattice parameter has expanded 20%. Calculate the 2q value of the diffraction peak of the material at the high temperature. λλ is fixed. Do not assume a particular (hkl) set of values, nor a value for λ.Quartz is a uniaxial birefringent material with refractive indices no=1.5534 and ne=1.5443. It is desired to make a quarter-wave plate of quartz for use with a Sodium laser of wavelength λ0=589 nm. Calculate the minimum thickness of the plate.Give your answer in micrometers to 1 d.p.HW1: If an X-ray diffraction pattern for a powder sample of Cr (crystal system: body-centered cubic and lattice parameter a=0.2000 nm) is measured using a conventional diffractometer, we will obtain six diffraction peaks corresponding to (110), (200), (211), (220), (310), and (222) planes. Compute the Lorentz-polarization factor using Cu-K̟radiation Lamda=1.545 nm. Hint: make a table for indexing pattern analysis.
- In ATR-FTIR, the refractive index of the crystal used must be significantly lesser than that of the sample. True FalsePotassium chloride is a crystal with lattice spacing of 0.314 nm. The fi rst peak for Bragg diffraction is observed to occur at 12.8°. What energy x rays were diffracted? What other order peaks can be observed (≤ 90°)?The vanadium crystallizes in the body centered cubic lattice with a lattice parameter a. The X-ray diffraction data were collected from this compound and the following first four Bragg positions 20 (degrees): 21.06, 30.17, 37.03 and 43.10 were registered. The wavelength of the used X-ray radiation is 2 = 1.54Á. 1- Give the Bragg's Law. 2- Determine the inter-planer spacing d of the family of lattice planes (hke) of the cubic system. hkt 3 - Using the structure factor, determine the allowed reflections of the body centered cubic. 4- Index the four Bragg angles given above and calculate the cell parameter a.
- Consider that the low frequency spectrum of the HCl molecule can be described by a harmonic oscillator model, where the chlorine atom remains at the center of mass while the hydrogen atom oscillates. The light absorption lines by the HCl have a frequency of 8.66 × 10¹³ Hz. The oscillator spring constant is?Crystal lattices can be examined with x rays but not UV. Why?