|Message: Re: how can I get the absorption length of other materials||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
The absorption length will depend mostly on the chemical make-up of the material and will be, usually, an experimentally defined parameter.
As an example, I am working with plastic scintillators, so I used google to find papers in scientific journals detailing work on plastic absorption/attenuation lengths.
(Example from JLab: https://www.jlab.org/Hall-B/notes/clas_notes92/note92-007.pdf ).
Generally, you can calculate this using an attenuation calculation of something like:
(I/I0) = exp[-u*L]
where u is based on the input masses and abundances on the material. The length of interest will be when I/I0 = 1/Exp.
Hope this helps, Zach