1) gamma background
γ本底
2) gamma background
γ射线本底
3) low background gamma-spectrometry
低本底γ谱仪
4) background
[英]['bækɡraʊnd] [美]['bæk'graund]
本底
1.
Radioactivity background of soil environment and status investigation in Daqing region;
大庆地区土壤环境放射性本底及现状水平调查与评价
2.
The significance of single background quality control chart in monitoring long-term stability of the thyroid function equipment;
本底个值质控图对甲功仪长期稳定性监控的意义
3.
Developing a system for measuring coincidence Doppler broadening spectrum of positron annihilation radiation with very low background;
低本底符合正电子湮没辐射多普勒展宽装置的研制
5) master copy
底本
1.
The Lower Limit of the Formation of Shu Master Copy maybe Was 50Years for the Qianlong
舒本的底本形成的时间下限可为乾隆五十年
2.
By comparing the unearthed remaining volumes of Annotation of Materia Medica with New Materia Medica, the author has found that the master copy of Annotation of Materia Medica is different from other versions.
《本草经集注》原有三卷本和七卷本两种,《新修本草》是以七卷本为底本修撰的。
3.
The sorted-out master copy of Collected Works of Yang Sichang is the hereditary old copy of Collected Works of Mr.
《杨嗣昌集》的整理底本为传世的旧钞本《杨文弱先生集》,它形成于清康熙中后期,凝聚了杨家祖孙三代的心血。
6) semiprimitive gamma ring
半本原Γ-环
补充资料：本底辐射(radiationbackground)
【本底辐射】(radiationbackground)指来自欲进行探测或测量的放射源以外任何天然或人工放射源的辐射。它们来自宇宙射线、周围环境中放射性影响和仪器本身（如铅室）的放射性。随环境改变而有明显变化。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条