High energy magnetic inelastic neutron scattering at ISIS

✍ Scribed by R. Osborn

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 944 KB
• Volume: 159
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(89)90033-1

✦ Synopsis

Two recent experiments on the HET spectrometer of the UK spallation neutron source ISIS are described, as examples of the potential of high energy magnetic neutron scattering. The measurements of intermultiplet transitions with energies up to 810 meV in praseodymium metal give direct evidence of the screening of the intra-4f electrostatic interaction for the first time in a metal. The results are discussed in the light of atomic orbital calculations of the transition intensities. Crystal field splittings in UO, establish both the symmetry of the ordered phase and the degree of J-mixing in the ground state wavefunctions