https://repository.auw.edu.bd/handle/123456789/728 2026-06-09T23:49:09Z 2026-06-09T23:49:09Z Meaze, AKM Moinul Haque https://repository.auw.edu.bd/handle/123456789/948 2026-02-18T06:15:28Z 2006-01-01T00:00:00Z

Measurements of the Neutron Total Cross-Sections of Tantalum by Using Pulsed Neutrons Based on an Electron Linac Meaze, AKM Moinul Haque The neutron total cross-sections of tantalum (181Ta) were measured in the neutron energy region from 0.01 eV to 100 eV by using the time-of-flight method at the Pohang Neutron Facility, which consists of an electron linac, a water-cooled tantalum target with a water moderator, and a 12-m- long time-of-flight path. A 6Li-ZnS(Ag) scintillator with a diameter of 12.5 cm and a thickness of 1.6 cm was used as a neutron detector, and a natural tantalum metal plate, 10 × 10 cm2 in area by 0.45 mm in thickness, was used for the neutron transmission measurement. The background level was determined by using a notch-filter of Co, In, and Cd sheets. The present measurement was compared with the previous ones and the evaluated data in ENDF/B-VI.8. The resonance parameters of 181Ta isotope were obtained from the transmission ratio by using the SAMMY code, which utilizes both Doppler and resolution broadening effects and Bayes’ generalized least squares technique.

2006-01-01T00:00:00Z Meaze, AKM Moinul Haque https://repository.auw.edu.bd/handle/123456789/947 2026-02-18T06:15:26Z 2006-01-01T00:00:00Z

Measurements of neutron and photon distributions by using an activation technique at the pohang neutron facility Meaze, AKM Moinul Haque The Pohang Neutron Facility, which consists of an electron linear accelerator, a water-cooled Ta target with a water moderator, and a time-of-flight path with an 11-m length, was constructed to measure neutron total cross-sections in the neutron energy region from thermal to several hundreds of eV by using the time-of-flight method. In order to utilize this pulsed neutron facility based on an electron linac, we have to understand the characteristics of the radiation fields produced in this facility. We used the multiple-foil activation method to measure the neutron and the photon distributions produced by a water-cooled Ta target with and without the water moderator.

2006-01-01T00:00:00Z Meaze, AKM Moinul Haque https://repository.auw.edu.bd/handle/123456789/946 2026-02-18T06:15:22Z 2006-01-01T00:00:00Z

Photo-Neutrons Produced at the Pohang Neutron Facility Based on an Electron Linac Meaze, AKM Moinul Haque The Pohang Neutron Facility based on an electron linac was operated for total neutron cross- section measurements by using the pulsed neutrons produced in a water-cooled Ta-target with a water moderator. We investigated the photo-neutrons produced in the water-cooled Ta-target system by using the Monte-Carlo simulation code MCNPX, version 2.5e, and the results were checked with the experimental values. The optimum conditions of the target system and the experimental setup to maximize the thermal neutron production were investigated.

2006-01-01T00:00:00Z