検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Storage characteristics of SrBPO$$_{5}$$:Eu$$^{2+}$$ phosphors by fast neutron irradiation

高速中性子照射によるSrBPO$$_{5}$$:Eu$$^{2+}$$の輝尽性蛍光特性

坂佐井 馨  ; 岩元 洋介   ; 曽山 和彦  

Sakasai, Kaoru; Iwamoto, Yosuke; Soyama, Kazuhiko

SrBPO$$_{5}$$:Eu$$^{2+}$$蛍光体の14.8MeV高速中性子による輝尽性蛍光特性を調べた。高速中性子感度を増大させるため、高速中性子と水素との弾性散乱による陽子発生源となるポリエチレンシートをその前面に配置した。輝尽性蛍光感度はポリエチレンシートの厚さが3mmのときに得られ、これはPHITSによるモンテカルロ計算結果と一致した。5MeV及び14.8MeV中性子による中性子感度を評価したところ、それぞれ、5$$times$$10$$^{-5}$$及び2.5$$times$$10$$^{-4}$$となり、これもPHITSによる計算と一致した。本蛍光体とポリエチレンの組合せは、高$$gamma$$線下での中性子モニタリングやイメージングに有効である。

Storage characteristics of SrBPO$$_{5}$$:Eu$$^{2+}$$ phosphor were investigated when the phosphor was irradiated by fast neutron with energy of 14.8 MeV. To improve the fast neutron sensitivity, polyethylene (PE) sheets as a proton generator were set in front of the phosphors. The maximum PSL yields were obtained at a PE thickness of about 3 mm. These experimental results well agreed with those by Monte Carlo simulation using PHITS code. Estimated PSL yields by $$gamma$$-ray associated with fast neutron fields were negligible. The neutron sensitivities of 5 MeV- and 14.8 MeV-neutrons were estimated and were also agreed with those by MC simulation. This combination use of such phosphors and PE sheets will be usable for fast neutron monitoring or imaging in a high $$gamma$$-ray fields.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.