Deep inelastic neutron scattering from orthorhombic ordered HCl: Short-time proton dynamics and anomalous neutron cross sections

Foil cycling technique for the VESUVIO spectrometer operating in the resonance detector configuration

“…The improvement in width, obtained by the FCT, is about 44% for the 35 Cl+ 27 Al peak and about 10% for the 2 D peak. This is due to the fact that the width of the 35 Cl + 27 Al recoil peak is mostly dominated by the instrumental resolution while, due to the lower mass of the deuteron, the width of the 2 D recoil peak is largely due to the atomic momentum distribution.…”

“…This is due to the fact that the width of the 35 Cl + 27 Al recoil peak is mostly dominated by the instrumental resolution while, due to the lower mass of the deuteron, the width of the 2 D recoil peak is largely due to the atomic momentum distribution. Furthermore the overlap of the two peaks in the TOF spectrum of Fig.…”

“…77, 095103 ͑2006͒ final neutron energy. Due the to low mass of the deuterium nucleus and the small scattering angle, the recoil peaks of 2 D and 35 Cl+ 27 Al are partially superimposed. The peak located at 260 s is a spurious peak caused by sample environment equipment.…”

“…The peak located at 260 s is a spurious peak caused by sample environment equipment. The width of the 35 Cl+ 27 Al recoil peak is about 18 s FWHM, while the 2 D recoil peak has a FWHM of about 52 s. Figure 7͑b͒ shows the DINS spectrum of the DCl sample registered by the YAP detector employing the FCT, thus subtracting the foil-in spectrum. As explained in Sec.…”

“…19 The continuous line is a fit provided by a multipeak fitting procedure. The dashed-dotted line, peaking at about 376 s, is the contribution of the 35 Pb sample for the foil-out measurement ͑open dots͒ and for the foil-in measurement ͑full dots͒. These data have been corrected for background using a separate measurement without analyzer and cycling foils.…”