Research Article
Experimental Study on the Transport of Light Gas Molecules through Low-Density Polyethylene Films
Figure 3
(a) Mass spectrum of the background vacuum at Pa after one night of turbomolecular pumping. The dominant contributions are related to the signals pertinent to H2O, CO, and H2 (m/e = 18, 28, and 2, respectively). Their fragmentation products are also reported; see text. (b) QMS mass signals and (m/e = 4 and 28, respectively) recorded in the permeation test. Arrows indicate the trigger time of the experiment.
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