Measurement  and  Simulation  of  Leakage  Spectra  on  Polyethylene Slab  Irradiated  with  D-T  Neutrons

NIE  Yang-bo; BAO  Jie; RUAN  Xi-chao; ZHOU  Zu-ying

doi:10.11804/NuclPhysRev.29.03.310

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Article Navigation > Nuclear Physics Review > 2012 > 29(3): 310-315

NIE Yang-bo, BAO Jie, RUAN Xi-chao, ZHOU Zu-ying. Measurement and Simulation of Leakage Spectra on Polyethylene Slab Irradiated with D-T Neutrons[J]. Nuclear Physics Review, 2012, 29(3): 310-315. doi: 10.11804/NuclPhysRev.29.03.310

Citation:

NIE Yang-bo, BAO Jie, RUAN Xi-chao, ZHOU Zu-ying. Measurement and Simulation of Leakage Spectra on Polyethylene Slab Irradiated with D-T Neutrons[J]. Nuclear Physics Review, 2012, 29(3): 310-315. doi: 10.11804/NuclPhysRev.29.03.310

Measurement and Simulation of Leakage Spectra on Polyethylene Slab Irradiated with D-T Neutrons

doi: 10.11804/NuclPhysRev.29.03.310

1.
Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy,Beijing 102413,China)(2.Northwest Institute of Nuclear Technology,Shanxi Xi'an 710024, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2012-09-20

Abstract

The neutron leakage spectrum were measured at 40° by timeofflight method for polyethylene slabs with the thicknesses of 4.5， 9，18 and 27 cm，respectively. The experimental results were compared with the MCNP-4C simulations， which carefully considered many effects， such as the angle and energy distributions of the source neutrons，the width of the beam pulse，the detection efficiency and the effective measured area. The sample out and collimatorfilled spectra were measured as the background， and the results showed that C/E values were larger than 1 when using the sample out background spectra，but smaller than 1 when using the collimatorfilled background spectra. Combine these two different background spectra， a new method was used to calculate the background spectrum，and the results have a better agreement with the simulations.
- timeofflight(TOF),
- polyethylene,
- neutron leakage spectrum,
- MCNP4C code,
- effective measured area
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Measurement and Simulation of Leakage Spectra on Polyethylene Slab Irradiated with D-T Neutrons

doi: 10.11804/NuclPhysRev.29.03.310

1. Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy,Beijing 102413,China)(2.Northwest Institute of Nuclear Technology,Shanxi Xi'an 710024, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2012-09-20

Key words:

Abstract: The neutron leakage spectrum were measured at 40° by timeofflight method for polyethylene slabs with the thicknesses of 4.5， 9，18 and 27 cm，respectively. The experimental results were compared with the MCNP-4C simulations， which carefully considered many effects， such as the angle and energy distributions of the source neutrons，the width of the beam pulse，the detection efficiency and the effective measured area. The sample out and collimatorfilled spectra were measured as the background， and the results showed that C/E values were larger than 1 when using the sample out background spectra，but smaller than 1 when using the collimatorfilled background spectra. Combine these two different background spectra， a new method was used to calculate the background spectrum，and the results have a better agreement with the simulations.

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