Neutronic performance on a mixed cold moderator of polyethylene particles and liquid hydrogen
Conference
·
OSTI ID:1164822
We measured the neutronic performance of a mixed moderator of polyethylene particles plus liquid hydrogen as the first test of a mixed type moderator. The energy spectrum from the mixed moderator looks like a linear combination of each spectrum from the polyethylene particles and from liquid hydrogen. We obtained 1.2~1.4 times higher cold neutron intensity, but with a longer pulse width than a decoupled liquid hydrogen moderator in the cold neutron region. In the slowing-down region it gave much higher intensity with almost the same pulse width. We found that this type of moderator exhibits better characteristics as a narrow pulse thermal neutron source.
- Research Organization:
- Japan Atomic Energy Research Inst., Tokai-mura, Ibaraki (Japan); Kokkaido Univ., Sapporo (Japan)
- OSTI ID:
- 1164822
- Report Number(s):
- IWCMPNS--1997; CONF-9709132--
- Country of Publication:
- United States
- Language:
- English
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