add some radiation parameters

[szy21]

Purpose

These two parameters will be used to limit temperature input to radiation.

To-do

Content

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• I have read and checked the items on the review checklist.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.50%. Comparing base (1f401e1) to head (cee9ddd).
Report is 4 commits behind head on main.

❗ Current head cee9ddd differs from pull request most recent head ac3a04f

Please upload reports for the commit ac3a04f to get more accurate results.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #198   +/-   ##
=======================================
  Coverage   98.50%   98.50%           
=======================================
  Files           2        2           
  Lines         134      134           
=======================================
  Hits          132      132           
  Misses          2        2           

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[nefrathenrici]

Thank you!