alum 27 bombarded with neutron, gamma emitted. What is isotope?
I am not convinced there is enough information here. Anyway let us assume that one neutron is captured then
27Al13 + 1n0 -> 28Al13
i.e the isotope 28Al is formed.
To determine the isotope produced when aluminum-27 (Al-27) is bombarded with neutrons and gamma rays are emitted, we need to understand the process of nuclear reactions.
When a nucleus is bombarded with a neutron, it can capture the neutron and undergo a nuclear reaction. In this case, Al-27 captures a neutron and becomes Al-28 (Aluminum-28).
After the capture of the neutron, the newly formed Al-28 nucleus may be in an excited state. To transition to a more stable state, the nucleus releases excess energy in the form of gamma rays. These gamma rays have very high energy and do not affect the identity of the isotope.
Therefore, when Al-27 is bombarded with neutrons and gamma rays are emitted, the resulting isotope is Al-28.