1 Historical Developments and Future Perspectives …
17
Fig. 1.3 Experimental set-up at the “Mössbauer Test station” F4 at DORIS, Desy (Hamburg)
(from [51]). The entire set-up is about 2 m in length. Vormonochromator: high-heat-load monochromator, Spalt: slit system, Kr-Zelle: energy calibration with Kr K-edge, Blende: aperature, Kernbraggmonochromator: nuclear monochromator, MB-Absorber: MB-absorber on MB-driving system,
Detektor: high-purity germanium solid state detector (cooled)
Fig. 1.4 Resonance curve of
the diffracted γ -quanta after
the nuclear monochromator
as function of the energy of
the high-heat-load
monochromator. The solid
line is a fit with a Gaussian
distribution and the energy
scale is centred to its
maximum (from [51]).
(Reprinted figure with
permission from [8],
Copyright (1985) by the
American Physical Society)
to the [002] pure nuclear reflection. A small external magnetic field (30 mT) assured
a defined and single domain magnetic state of the crystals.
As detector system a high-purity germanium solid state detector with about 1 keV
energy resolution and a conventional fast-slow coincidence system (see Fig. 1.14)
with an overall 18 ns time resolution has been used.
The performance of the system was verified by measuring the so-called resonance
curve of the nuclear monochromator, i.e., the intensity of the resonant quanta, as integrated over a time window between 32 and 137 ns after the prompt pulse, versus the
energy of the system. Figure 1.4 displays the reflectivity of the nuclear monochro-
17
Fig. 1.3 Experimental set-up at the “Mössbauer Test station” F4 at DORIS, Desy (Hamburg)
(from [51]). The entire set-up is about 2 m in length. Vormonochromator: high-heat-load monochromator, Spalt: slit system, Kr-Zelle: energy calibration with Kr K-edge, Blende: aperature, Kernbraggmonochromator: nuclear monochromator, MB-Absorber: MB-absorber on MB-driving system,
Detektor: high-purity germanium solid state detector (cooled)
Fig. 1.4 Resonance curve of
the diffracted γ -quanta after
the nuclear monochromator
as function of the energy of
the high-heat-load
monochromator. The solid
line is a fit with a Gaussian
distribution and the energy
scale is centred to its
maximum (from [51]).
(Reprinted figure with
permission from [8],
Copyright (1985) by the
American Physical Society)
to the [002] pure nuclear reflection. A small external magnetic field (30 mT) assured
a defined and single domain magnetic state of the crystals.
As detector system a high-purity germanium solid state detector with about 1 keV
energy resolution and a conventional fast-slow coincidence system (see Fig. 1.14)
with an overall 18 ns time resolution has been used.
The performance of the system was verified by measuring the so-called resonance
curve of the nuclear monochromator, i.e., the intensity of the resonant quanta, as integrated over a time window between 32 and 137 ns after the prompt pulse, versus the
energy of the system. Figure 1.4 displays the reflectivity of the nuclear monochro-