MLZ is a cooperation between:

Technische Universität München> Technische Universität MünchenHelmholtz-Zentrum Hereon> Helmholtz-Zentrum Hereon
Forschungszentrum Jülich> Forschungszentrum Jülich

MLZ is a member of:

LENS> LENSERF-AISBL> ERF-AISBL

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MLZ (eng)

Lichtenbergstr.1
85748 Garching

FaNGaS

Fast Neutron-induced Gamma-ray Spectrometry

FaNGaS FaNGaS Schematic representation of FaNGaS

Schematic representation of FaNGaS

FaNGaS (Fast Neutron-induced Gamma-ray Spectrometry) is a new instrument at MLZ. [1]

The instrument consists of an electro-mechanically cooled HPGe detector connected to a digital spectrometer for data acquisition and is surrounded by a complex shielding. [2]

FaNGaS utilisses fission neutrons at the SR-10 neutron beam tube to induce gamma radiation for chemical analysis. The particularly large beam diameter at SR-10 allows for the irradiation of large objects. Non-destructive qualitative and quantitative elemental analysis is performed by using prompt gamma irradiation that is induced by fission neutrons via nuclear reactions, such as (n,n’), (n,2n), (n,p) and (n,α). [3]

[1] Rossbach, M. et al., J Radioanal Nucl Chem 304, 1359 (2015).
[2] Randriamalala, T. et al., NIM-A 806, 370 (2016).
[3] Demidov, A.M. et al., “Atlas of Gamma-Ray Spectra from the Inelastic Scattering of Reactor Fast Neutrons”, Nuclear Research Institute, Baghdad, Iraq (Moscow, Atomizdat 1978).

Typical applications
  • Irradiation of large samples (archaeology, industry, etc.)
  • Fundamental research (nuclear data, partial and total cross-section measurements of different reactions, etc.)
Technical data
Neutron Beam
  • Neutron collimator: 6 cm diameter
  • Multi-Leaf-Collimator: adjustable up to 27 × 19 cm2
  • Typical beam size (sample size): 6 × 6 cm2
  • Typical neutron flux: ~ 108 n cm-2 s-1, depending on filter
Detector System und Data Acquisition
  • n-type HPGe detector with a relative efficiency of 50%, connected to a digital spectrometer (DSPEC-50 from ORTEC)
  • Detector cooling: CFG-X-COOL-III von ORTEC
  • Detector shielding: BPE, PE und Pb
  • Spectrum evaluation and calibration (non-linearity and efficiency) performed using the HYPERMET-PC Software

Instrument scientists

Dr. Iaroslav Meleshenkovskii
Phone: +49 (0)89 158860-602
E-mail: i.meleshenkovskii@fz-juelich.de

Dr. Eric Mauerhofer
Phone: +49 2461/61-3341
E-mail: e.mauerhofer@fz-juelich.de

PGAA
Phone: +49 (0)89 289-14906

Operated by

JCNS

Funding

MLZ is a cooperation between:

Technische Universität München> Technische Universität MünchenHelmholtz-Zentrum Hereon> Helmholtz-Zentrum Hereon
Forschungszentrum Jülich> Forschungszentrum Jülich

MLZ is a member of:

LENS> LENSERF-AISBL> ERF-AISBL

MLZ on social media: