# Cross section data

**URL:** <https://openmc.discourse.group/t/cross-section-data/1590>\
**Category:** User Support\
**Created:** [December 11, 2021, 6:18am UTC](https://openmc.discourse.group/t/cross-section-data/1590 "2021-12-11T06:18:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![imtiaj\_hossain](https://avatars.discourse-cdn.com/v4/letter/i/90db22/32.png) [@imtiaj\_hossain](https://openmc.discourse.group/u/imtiaj_hossain)\
**Post date:** [December 11, 2021, 6:18am UTC](https://openmc.discourse.group/t/cross-section-data/1590/1 "2021-12-11T06:18:49Z")

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Hi. I’m Sorry but this post isn’t entirely related to OpenMC. Does anyone have ENDF/B cross section data for 553" & 560" k temperature? Can anyone provide me these?

-Thanks

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**Author:** ![tjlaboss](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/tjlaboss/32/1390_2.png) [@tjlaboss](https://openmc.discourse.group/u/tjlaboss)\
**Post date:** [December 11, 2021, 10:26pm UTC](https://openmc.discourse.group/t/cross-section-data/1590/2 "2021-12-11T22:26:36Z")

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You can set temperatures of [Cell](https://docs.openmc.org/en/v0.12.2/pythonapi/generated/openmc.Cell.html) or [Material](https://docs.openmc.org/en/v0.12.2/pythonapi/generated/openmc.Material.html) instances, or set a default temperature using [Settings](https://docs.openmc.org/en/v0.12.2/pythonapi/generated/openmc.Settings.html?highlight=temperature#temperature). The Settings can also be used to ensure temperature interpolation.

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**Author:** ![paulromano](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/paulromano/32/486_2.png) [@paulromano](https://openmc.discourse.group/u/paulromano)\
**Post date:** [December 12, 2021, 2:11pm UTC](https://openmc.discourse.group/t/cross-section-data/1590/3 "2021-12-12T14:11:30Z")

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@imtiaj_hossain The data that is represented in ENDF is at 0 K. If you want cross sections at a higher temperature, they need to be Doppler broadened which can be done with a program such as [NJOY](http://www.njoy21.io/). If you want cross sections specifically for OpenMC, you can find pregenerated libraries here: [Official Data Libraries | OpenMC](https://openmc.org/official-data-libraries/). Our libraries have cross sections at 300 K and 600 K and you can ask the code to interpolate between cross sections with:

```python
settings = openmc.Settings()
settings.temperature = {'method': 'interpolation'}

```