[1] Los Alamos Natl Lab, LANSCE Lujan Neutron Scattering Ctr, Los Alamos, NM 87545 USA
[2] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA
[3] Natl Inst Mat Sci, Quantum Beam Ctr, Tsukuba, Ibaraki 3050044, Japan
[4] Natl Museum Nat & Sci, Tsukuba, Ibaraki 3050005, Japan
[5] Res Ctr Neutron Sci & Technol, Tokai, Ibaraki 3191106, Japan
[6] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China