emanation

n.

发射；散发；发射物；（由衰变产生的）射气

复数：emanations

1. The perfume is an emanation from the flower.
   这香气来自花朵。
2. It is an emanation from the distant orb of immortal light.
   它是从远处那个发出不灭之光的天体上放射出来的。

Radon emanation on San Andreas Fault
The emanation thermal analysis of kaolinite clay minerals
The radon emanation power of building materials, soils and rocks
The effect of stress on radon emanation from rock
PORTABLE DEVICE FOR VAPOUR EMANATION BY HEATING A VOLATILE COMPOUND IN A CARTRIDGE
Effect of moisture content on radon emanation from uranium ore and tailings
Radon emanation and electric potential variations associated with transient deformation near reservoir lakes
Quantification of the dependency of radon emanation power on soil temperature
Equatorial energy accumulation and emanation regions : Impacts of a zonally varying basic state.
A comprehensive review of radon emanation measurements for mineral, rock, soil, mill tailing and fly ash.