- #1
roshan2004
- 140
- 0
What's the main reason behind the fine structure of X-Ray transition?
Fine structure of X-Ray transition
- Context: Graduate
- Thread starter roshan2004
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- Structure Transition X-ray
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SUMMARY
The fine structure of X-Ray transitions is primarily caused by the scattering of photoelectrons from neighboring atoms following core electron removal. In the case of molybdenum, X-ray lines are observed between 0.5 and 0.6 Angstroms, corresponding to energy levels of 24 KeV to 21 KeV. The discussion highlights two mechanisms for splitting atomic transitions: fine structure, which involves the j = l + 1/2 and j = l - 1/2 transitions, and the ionization state of the atom, specifically referencing Mo LXII and Mo LXI. The energy difference for the fine structure in the 3p initial state is approximately 44 eV out of 21,800 eV.
PREREQUISITES- Understanding of X-Ray spectroscopy
- Familiarity with atomic transition energies
- Knowledge of electron scattering phenomena
- Basic concepts of ionization states in atoms
- Explore the NIST Atomic Spectra Database for detailed atomic transition energies
- Study the principles of electron scattering in solid-state physics
- Investigate the implications of fine structure on X-Ray emission spectra
- Learn about the different ionization states of transition metals, focusing on molybdenum
Physicists, materials scientists, and researchers in the field of X-Ray spectroscopy who are interested in the detailed mechanisms behind atomic transitions and their fine structures.
- #2
Rajini
- 619
- 4
Hi,
Fine structure (oscillations) primarily arises from the fact that the photoelectron (as a result of the core electron removal) gets scattered by all neighboring atoms.
Fine structure (oscillations) primarily arises from the fact that the photoelectron (as a result of the core electron removal) gets scattered by all neighboring atoms.
- #3
Bob S
- 4,662
- 8
Here (in thumbnail) is a sample of X-ray lines in molybdenum between 0.5 and 0.6 Angstroms (24 KeV to 21 KeV).. This is taken from the NIST table on atomic transition energies.
http://physics.nist.gov/PhysRefData/ASD/lines_form.html
There are two ways a particular atomic transition can be split:
1) Fine structure. I have drawn a box around the 3p3/2 and 3p1/2 to the 1s1/2 transitions. These are split by j = l + 1/2 and j = l - 1/2 fine structure in the 3p initial state; about 44 eV energy difference out of 21,800 eV.
2) The ionization state of atom. This table shows only two ionization states (# of electrons missing), Mo LXII and Mo LXI (LXI and LXII represent the ionization state), but there are many more. Go explore.
Bob S
http://physics.nist.gov/PhysRefData/ASD/lines_form.html
There are two ways a particular atomic transition can be split:
1) Fine structure. I have drawn a box around the 3p3/2 and 3p1/2 to the 1s1/2 transitions. These are split by j = l + 1/2 and j = l - 1/2 fine structure in the 3p initial state; about 44 eV energy difference out of 21,800 eV.
2) The ionization state of atom. This table shows only two ionization states (# of electrons missing), Mo LXII and Mo LXI (LXI and LXII represent the ionization state), but there are many more. Go explore.
Bob S
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