Editing Lodewijk van den Berg (section)

==Career after NASA==
After returning to Earth, Van den Berg continued to work on crystal growth experiments at EG&G in California and he became the head of the [[materials science]] section. He moved to [[Florida]] becoming a chief scientist at the [[Constellation Technology Corporation]]. At age 72 he continued to work up to 40 hours a week and grow crystals, a process he compared to gardening.<ref name="netwerk" /> The mercuric iodide crystals he grew<ref>{{cite web |url=http://www.contech.com/Mercuric_Iodide_Detectors.htm |title=Mercuric Iodide Detectors |work=Constellation Technology |archive-url=https://web.archive.org/web/20041019045524/http://www.contech.com/Mercuric_Iodide_Detectors.htm |archive-date=October 19, 2004}}</ref> are used to make precision detectors for [[nuclear radiation]]. The detectors are used in medical applications, by the defense industry, and by the [[International Atomic Energy Agency]].<ref name="netwerk" />