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BL04 ANNRI Accurate Neutron-Nucleus Reaction Measurement Instrument

Summary

Grasping Nuclear Reactions at a Moment

Research ObjectivesThe reaction probabilities between neutrons and nuclei are precisely measured for a wide region of neutron energy.
FeaturesThe neutron flight time gives its velocity and energy. Gamma-rays generated by nuclear reaction are measured with high precision. A small sample, less than 1 mg, is used due to the high power of the neutrons.

ANNRI is used for studies of nuclear science (nuclear data for nuclear technology and astrophysics, quantitative analyses etc.)

Specification

Last Update: 2014-09-19

InstrumentAccurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI)
Overview of instrumentANNRI is used for studies of nuclear science (nuclear data for nuclear technology and astrophysics, quantitative analyses etc.)
BeamlineBL04
ModeratorCoupled hydrogen moderator
Incident neutron energyEn > 0.0015eV
SpectrometerGe Spectrometer (Flight length: 21.5m)
NaI Spectrometer (Flight length: 28m)
Neutron intensity (@sample position @1MW)@21.5m sample position
4.3×107 n/cm2/s 1.5 meV < En < 25 meV
9.3×105 n/cm2/s 0.9 eV < En < 1.1 eV
1.0×106 n/cm2/s 0.9 keV < En < 1.1 keV
Sample size and/or volumeUsing the most downstream collimator, neutron beams with diameters of22, 15, 7, and 6 mm are provided to suit samples of different sizes.

Beamline Team

ContactAtsushi KIMURA (Nuclear Science and Engineering Center, JAEA)
Secondary contactYosuke TOH (Nuclear Science and Engineering Center, JAEA)
Shoji NAKAMURA (Nuclear Science and Engineering Center, JAEA)
Hideo HARADA (Nuclear Science and Engineering Center, JAEA)

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