Question

m-meson is a particle which has charge same as that of the electron and mass 207 times the mass of electron. A m-mesonic atom is formed when a m-meason is captured by proton. The ionization energy of such an atom is-

• A. 3.8 KeV
• B. 5 KeV
• C. 2.8 KeV
• D. 20 KeV

Answer 1

Answer: (C)

2.8 KeV

Answer 2

E₀

Ionization energy E₀ µ m

$\frac{(E_{0})_{2}}{(E_{0})_{1}}$= $\frac{m_{2}}{m_{1}}$= $\frac{207me}{me}$

(E₀)₂ = 207 (E₀)₁

= 207 × 13.6 eV

= 2.82 KeV