does critical mass has different ranges. i mean different packets of critical masses
Due to definition, critical mass is the smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level. The point and therefore the mass where criticality occurs may be changed by modifying certain attributes such as fuel, shape, temperature, density and the installation of a neutron-reflective substance.For given conditions (shape, temperature etc.) there is single value of critical mass.