Gregory J C
Chemistry Department, The University of Alabama in Huntsville, 35899, USA.
Radiat Meas. 1996 Nov;26(6):841-50. doi: 10.1016/s1350-4487(96)00092-3.
The radioactive isotope 7Be was discovered on the forward-facing side of the LDEF satellite in amounts far exceeding that expected from direct cosmic ray activation of the spacecraft material. This prompted an examination of the production of cosmogenic isotopes in the atmosphere and of the processes by which they may be transported to orbital altitudes and adsorbed by a spacecraft. 7Be is only one of several atmospheric cosmogenic isotopes that might be detectable at orbital altitudes and that might prove to be as useful as tracers of atmospheric circulation processes in the mesosphere and thermosphere as they have been in the lower layers of the atmosphere.
放射性同位素7铍是在长寿命暴露设施（LDEF）卫星的前向面被发现的，其含量远远超过了航天器材料直接受宇宙射线活化所预期的量。这促使人们对大气中宇宙成因同位素的产生以及它们被输送到轨道高度并被航天器吸附的过程进行研究。7铍只是几种大气宇宙成因同位素之一，这些同位素在轨道高度可能被探测到，并且可能被证明在中层大气和热层中作为大气环流过程的示踪剂与它们在低层大气中一样有用。
