称为氕或轻氢。
给聚合氘激发能量就会很容易地引发固态核聚变，而聚合氕没有发生反应。
Stimulation energy with Pycnodeuterium easily caused intense solid-state nuclear fusion, whereas with Pycnohydrogen no reaction occurred.
给聚合氘激发能量就会很容易地引发固态核聚变，而聚合氕没有发生反应。
Stimulation energy with Pycnodeuterium easily caused intense solid-state nuclear fusion, whereas with Pycnohydrogen no reaction occurred.
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