MSE
RevQ+Week-4+and+5+KEYS.pdf

# The energy is converted to be the electromagnetic

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is abruptly and greatly reduced. The energy is converted to be the electromagnetic wave, which is continuum x-ray. The complete conversion from kinetic energy to the x-ray is corresponding to the short wavelength cut-off. Characteristic x-ray: The inner electron of target atom is knocked out by the incident electron, which leaves a hole in the inner shell, and the outer shell electron can decay to occupy the hole, and emit the x-ray with some specific wavelength. (6) What parameters determine the total x-ray energy emitted/sec of continuous spectrum? (7) Please specify spin orbit (j, m) and # of electrons for principal quantum number =4. n=4 l 0(s) 1(p) 2(d) 3(f) j m # n=4 l 0(s) 1(p) 2(d) 3(f) j 1/2 1/2 3/2 3/2 5/2 5/2 7/2 m ± 1/2 ± 1/2 ± 1/2, ± 3/2 ± 1/2, ± 3/2 ± 1/2, ± 3/2, ± 5/2 ± 1/2, ± 3/2, ± 5/2 ± 1/2, ± 3/2, ± 5/2, ± 7/2 # 2 2 4 4 6 6 8 N I N II N III N IV N V N VI N VII

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(8) Draw the x-ray spectrum generated from Cu at 30 KeV electrons. (9) What happen for 1. when electron energy of 8.5 KeV is used instead of 30 KeV? (10) Wavelength for Cu-K α 1 and –K α 2 lines are so close each other, therefore it is often overlapped each other. What is the average wavelength for Cu-K
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