核电子学与探测技术
覈電子學與探測技術
핵전자학여탐측기술
NUCLEAR ELECTRONICS & DETECTION TECHNOLOGY
2014年
11期
1347-1352
,共6页
阵列电离室%电极片厚度和材质%电子发射产额%MCNP模拟研究
陣列電離室%電極片厚度和材質%電子髮射產額%MCNP模擬研究
진렬전리실%전겁편후도화재질%전자발사산액%MCNP모의연구
array ionization chambers%thickness and material of electrode plates%gamma ray induced electron emission%MCNP simulation study
本文通过对7种材质（ C、Al、Fe、Cu、Ag、W、Pb）电极片在1．25 MeV入射光子束作用下的电子发射产额进行模拟计算，研究了厚度和材质对阵列电离室电极片电子发射产额的影响关系。研究结果表明：阵列电离室电极片在辐射光子作用下的电子发射产额在电极片厚度较厚时（特别是大于0．01 mm时），随着电极片厚度或电子密度的增大而明显减小。另外，电极片长度的选取需要结合电极的材质适当考虑。
本文通過對7種材質（ C、Al、Fe、Cu、Ag、W、Pb）電極片在1．25 MeV入射光子束作用下的電子髮射產額進行模擬計算，研究瞭厚度和材質對陣列電離室電極片電子髮射產額的影響關繫。研究結果錶明：陣列電離室電極片在輻射光子作用下的電子髮射產額在電極片厚度較厚時（特彆是大于0．01 mm時），隨著電極片厚度或電子密度的增大而明顯減小。另外，電極片長度的選取需要結閤電極的材質適噹攷慮。
본문통과대7충재질（ C、Al、Fe、Cu、Ag、W、Pb）전겁편재1．25 MeV입사광자속작용하적전자발사산액진행모의계산，연구료후도화재질대진렬전리실전겁편전자발사산액적영향관계。연구결과표명：진렬전리실전겁편재복사광자작용하적전자발사산액재전겁편후도교후시（특별시대우0．01 mm시），수착전겁편후도혹전자밀도적증대이명현감소。령외，전겁편장도적선취수요결합전겁적재질괄당고필。
In this paper, by carrying out MCNP simulations on the electron emission yield induced by 1.25 MeV ( rays from electrodes of C, Al, Fe, Cu, Ag, W, Pb in array ionization chamber models, we studied the influ-ence of the electrodes'thickness and material on their gamma ray induced electron emission yields.The calcu-lated results show that, with the increase of the thickness ( over 0.01 mm) and the electron density of the elec-trodes, the yields of the emitted electrons from the array ionization chamber's electrodes decrease apparently, and that the length of the electrodes should be selected with due consideration of the electrodes'material.
