Activities on Nuclear Data Measurements at Pohang Neutron Facility
- Conference date: 8–11 September 2008
- Location: Ulaanbaatar (Mongolia)
We report the activities of the Pohang Neutron Facility which consists of an electron linear accelerator, a water‐cooled Ta target, and a 12‐m time‐of‐flight path. It has been equipped with a four‐position sample changer controlled remotely by a CAMAC data acquisition system, which allows simultaneous accumulation of the neutron time of flight spectra from 4 different detectors. It can be possible to measure the neutron total cross‐sections in the neutron energy range from 0.1 eV to few hundreds eV by using the neutron time‐of‐flight method. A glass scintillator was used as a neutron detector. The neutron flight path from the water‐cooled Ta target to the neutron detector was 12.1 m. The background level was determined by using notch‐filters of Co, In, Ta, and Cd sheets. In order to reduce the gamma rays from bremsstrahlung and those from neutron capture, we employed a neutron‐gamma separation system based on their different pulse shapes. The present measurements of several samples (Ta, Mo) are in general agreement with the evaluated data in ENDF/B‐VI. We measured the thermal neutron capture cross‐sections and the resonance integrals of the reaction and the reaction by the activation method using the monitor reaction as a single comparator. We also report the isomeric yield ratios for the 44 m, gSc isomeric pairs produced from four different photonuclear reactions and by using the activation method.
- Photonuclear reactions
- Nuclear reaction models
- Nuclear resonance reactions
- Scintillation detectors
- Linear accelerators
- Nuclear data analysis
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