Question

what are types of absorption coefficient?
what are the parameters which absorption coefficient dependence on?
Can make alpha, beta and gamma rays energies approaching to zero?

Answer 1

1. Molar absorptivity,also called "molar extinction coefficient", which is the absorption
coefficient divided by molarity.
The mass attenuation coefficient, also called"mass extinction coefficient", which is the absorption coefficient
divided by density .

2. The absorption coefficient depends onthe material and also on the wavelength of light which is being absorbed.