Which of the following is the energy after collision with a surface atom for a scattering angle of 90o when Eo is the energy of the incident ion, M1 is the mass of the incident ion and M2 is the mass of the target surface?
A. Eo(M2-M1)/(M2+M1)
B. Eo(M2+M1)/(M2-M1)
C. Eo(M2×M1)/(M2+M1)
D. Eo(M2-M1)/(M2×M1)
Answer:A
Which of the following is the energy after collision with a surface atom for a scattering angle of 90o when Eo is the energy of the incident ion, M1 is the mass of the incident ion and M2 is the mass of the target surface?
A. Eo(M2-M1)/(M2+M1) B. Eo(M2+M1)/(M2-M1) C. Eo(M2×M1)/(M2+M1) D. Eo(M2-M1)/(M2×M1)
Explanation: Eo(M2-M1)/(M2+M1) is the energy after collision with a surface atom for a scattering angle of 90o. But, this is valid only when M1<M2.