The present invention provides for a composition comprising an inorganic scintillator comprising a gadolinium halide, optionally cerium-doped, having the formula A.sub.nGdX.sub.m:Ce; wherein A is nothing, an alkali metal, such as Li or Na, or an alkali earth metal, such as Ba; X is F, Br, Cl, or I; n is an integer from 1 to 2; m is an integer from 4 to 7; and the molar percent of cerium is 0% to 100%. The gadolinium halides or alkali earth metal gadolinium halides are scintillators and produce a bright luminescence upon irradiation by a suitable radiation.
STATEMENT OF GOVERNMENTAL SUPPORT
The invention described and claimed herein was made utilizing funds supplied by the U.S. Department of Homeland Security under Grant No. HSHQDC-07-X-00170 and the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The government has certain rights in this invention.