摘要:
A halide scintillator material is disclosed. The material is single-crystalline and has a composition of the formula A3MBr6(1-x)Cl6x (such as Cs3CeBr6(1-x)Cl6x) or AM2Br7(1-x)Cl7x (such as CsCe2Br7(1-x)Cl7x), 0≦x≦1, wherein A consists essentially of Li, Na K, Rb, Cs or any combination thereof, and M consists essentially of Ce, Sc, Y, La, Lu, Gd, Pr, Tb, Yb, Nd or any combination thereof. Furthermore, a method of making halide scintillator materials of the above-mentioned compositions is disclosed. In one example, high-purity starting halides (such as CsBr, CeBr3, CsCl and CeCl3) are mixed and melted to synthesize a compound of the desired composition of the scintillator material. A single crystal of the scintillator material is then grown from the synthesized compound by the Bridgman method. The disclosed scintillator materials are suitable for making scintillation detectors used in applications such as medical imaging and homeland security.
摘要:
The present disclosure discloses, in one arrangement, a single crystalline iodide scintillator material having a composition of the formula AM1−xEuxI3, A3M1−xEuxI5 and AM2(1−x)Eu2xI5, wherein A consists essentially of any alkali metal element (such as Li, Na K, Rb, Cs) or any combination thereof, M consists essentially of Sr, Ca, Ba or any combination thereof, and 0≦x≦1. In another arrangement, the above single crystalline iodide scintillator material can be made by first synthesizing a compound of the above composition and then forming a single crystal from the synthesized compound by, for example, the Vertical Gradient Freeze method. Applications of the iodide scintillator materials include radiation detectors and their use in medical and security imaging.
摘要:
The present disclosure discloses, in one arrangement, a single crystalline chloride scintillator material having a composition of the formula A3MCl6, wherein A consists essentially of Cs and M consists essentially of Ce and Gd. In another arrangement, a chloride scintillator material is single-crystalline and has a composition of the formula AM2Cl7, wherein A consists essentially of Li, Na K, Rb, Cs or any combination thereof, and M consists essentially of Ce, Sc, Y, La, Lu, Gd, Pr, Tb, Yb, Nd or any combination thereof. Specific examples of these scintillator materials include single-crystalline Ce-doped KGd2Cl7 (KGd2(1-x)Ce2xCl7) and Ce-doped CsGd2Cl7(CsGd2(1-x)Ce2xCl7).
摘要:
A halide scintillator material is disclosed where the halide may comprise chloride, bromide or iodide. The material is single-crystalline and has a composition of the general formula ABX3 where A is an alkali, B is an alkali earth and X is a halide which general composition was investigated. In particular, crystals of the formula ACa1-yEuyI3 where A=K, Rb and Cs were formed as well as crystals of the formula CsA1-yEuyX3 (where A=Ca, Sr, Ba, or a combination thereof and X═Cl, Br or I or a combination thereof) with divalent Europium doping where 0≦y≦1, and more particularly Eu doping has been studied at one to ten mol %. The disclosed scintillator materials are suitable for making scintillation detectors used in applications such as medical imaging and homeland security.
摘要:
The present disclosure discloses, in one arrangement, a single crystalline iodide scintillator material having a composition of the formula AM1-xEuxI3, A3M1-xEuxI5 and AM2(1-x)Eu2xI5, wherein A consists essentially of any alkali metal element (such as Li, Na K, Rb, Cs) or any combination thereof, M consists essentially of Sr, Ca, Ba or any combination thereof, and 0≦x≦1. In another arrangement, the above single crystalline iodide scintillator material can be made by first synthesizing a compound of the above composition and then forming a single crystal from the synthesized compound by, for example, the Vertical Gradient Freeze method. Applications of the iodide scintillator materials include radiation detectors and their use in medical and security imaging.
摘要:
The present disclosure discloses, in one arrangement, a single crystalline chloride scintillator material having a composition of the formula A3MCl6, wherein A consists essentially of Li, Na K, Rb, Cs or any combination thereof, and M consists essentially of Ce, Sc, Y, La, Lu, Gd, Pr, Tb, Yb, Nd or any combination thereof. In another arrangement, a chloride scintillator material is single-crystalline and has a composition of the formula AM2Cl7, wherein A consists essentially of Li, Na K, Rb, Cs or any combination thereof, and M consists essentially of Ce, Sc, Y, La, Lu, Gd, Pr, Tb, Yb, Nd or any combination thereof. Specific examples of these scintillator materials include single-crystalline Cs3CeCl6, CsCe2Cl7, Ce-doped KGd2Cl7 (KGd2(1-x)Ce2xCl7) and Ce-doped CsGd2Cl7 (CsGd2(1-x)Ce2xCl7). In a further arrangement, the Bridgman method can be used to grown single crystals of the chloride scintillator materials compounds synthesized from starting chlorides.
摘要:
A halide scintillator material is disclosed. The material is single-crystalline and has a composition of the formula A3MBr6(1-x)Cl6x (such as Cs3CeBr6(1-x)Cl6x) or AM2Br7(1-x)Cl7x (such as CsCe2Br7(1-x)Cl7x), 0≦x≦1, wherein A consists essentially of Li, Na K, Rb, Cs or any combination thereof, and M consists essentially of Ce, Sc, Y, La, Lu, Gd, Pr, Tb, Yb, Nd or any combination thereof. Furthermore, a method of making halide scintillator materials of the above-mentioned compositions is disclosed. In one example, high-purity starting halides (such as CsBr, CeBr3, CsCl and CeCl3) are mixed and melted to synthesize a compound of the desired composition of the scintillator material. A single crystal of the scintillator material is then grown from the synthesized compound by the Bridgman method. The disclosed scintillator materials are suitable for making scintillation detectors used in applications such as medical imaging and homeland security.
摘要:
A halide scintillator material is disclosed where the halide may comprise chloride, bromide or iodide. The material is single-crystalline and has a composition of the general formula ABX3 where A is an alkali, B is an alkali earth and X is a halide which general composition was investigated. In particular, crystals of the formula ACa1-yEuyI3 where A=K, Rb and Cs were formed as well as crystals of the formula CsA1-yEuyX3 (where A=Ca, Sr, Ba, or a combination thereof and X=Cl, Br or I or a combination thereof) with divalent Europium doping where 0≦y≦1, and more particularly Eu doping has been studied at one to ten mol %. The disclosed scintillator materials are suitable for making scintillation detectors used in applications such as medical imaging and homeland security.
摘要:
A decentralized public key management system for named data networks based on blockchain, which solves the Compromised Certificate Authority (CA) Problem. The system divides the power of an individual CA among multiple Public Key Miners (PKMiners) that maintain the public key blockchains. The majority rule in name-principal validation allows the present invention to tolerate compromised PKMiners without causing any damage.
摘要:
A neutron sensor includes neutron-sensing particles and a scintillator coating surrounding the neutron-sensing particles. In an embodiment, the neutron-sensing particles include 6LiF particles, the scintillator coating includes ZnS, or both. In another embodiment, the scintillator coating can coat more than one neutron-sensing particle. In a further embodiment, the scintillator coating is formed on neutron-sensing particles using precipitation techniques or fluidized bed processing.