A zinc anode ( ) is bombarded with electrons energetic enough to remove a electron

PHYSICS · Subjective · Fermi University Physics · Atomic, Molecular & Optical Physics · One-electron atoms and the origins of atomic structure · Many-electron atoms and the periodic table

Deriving the Spectrum, Ch The central field and the periodic table

Problem

A zinc anode (

Z=30

) is bombarded with electrons energetic enough to remove a

1s

electron. A

2p

electron then falls into the vacancy, emitting a

K_\alpha

X-ray. Using Moseley's law with a screening constant of one (the remaining

1s

electron screens one unit of nuclear charge from the

2p

electron), estimate the

K_\alpha

photon energy in keV. Take the Rydberg energy as

hcR_\infty=13.606\,\mathrm{eV}

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