9;dead_layer&#39;, [(&#39;te_o2&#39;, 392 * u.nm)]),
])

MATERIALS = OrderedDict([
    (&#39;al&#39;, ({
        &#39;Al&#39;: 1.0
    }, 2.7 * u.g / u.cm**3)),
    (&#39;be&#39;, ({
        &#39;Be&#39;: 1.0
    }, 1.85 * u.g / u.cm**3)),
    (&#39;kapton&#39;, ({
        &#39;H&#39;: 0.026362,
        &#39;C&#39;: 0.691133,
        &#39;N&#39;: 0.073270,
        &#39;O&#39;: 0.209235
    }, 1.43 * u.g / u.cm**3)),
    (&#39;mylar&#39;, ({
        &#39;H&#39;: 0.041959,
        &#39;C&#39;: 0.625017,
     