 by shielding, distance from the source, or spatial orientation), or modification of the material to be less sensitive to radiation damage (e.g.by adding antioxidants, stabilizers, or choosing a more suitable material).In addition to the electronic device hardening mentioned above, some degree of protection may be obtained by shielding, usually with the interposition of high density materials (particularly lead, where space is critical, or concrete where space is available) between the radiation source and areas to be protected.