TFXA spectrometer, ISIS

Of the low final energy crystal analyser instruments, there were several early spectrometers that incorporated some of the elements found in current machines. The first instrument to include all the elements was installed at KENS (Tsukuba, Japan) in die early 1980 s [18]. Similar instruments were commissioned over the next decade NERA-PR at IBR-2 (Dubna, Russia) [24], CHEX at IPNS (Argonne, USA) [25] and TFXA at ISIS (Chilton, UK) [26]. The operating principle of all these... 

Figure 11. Inelastic neutron scattering powder spectra of four isotopomers of BA at 5 K recorded with the TFXA spectrometer at ISIS (Rutherford Appleton Laboratories). The spectra are normalized for the mass of the samples and the total incident neutron flux. The differences in intensity are due to the differences in scattering cross section of the isotopes. (Adapted from Horsewill et al. [156].)...

J. Penfold J. Tomkinson (1986). Rutherford Appleton Laboratory Report RAL-86-019. The ISIS time focused crystal spectrometer, TFXA. 

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