# Albedo value depending of neutron energy

**URL:** <https://openmc.discourse.group/t/albedo-value-depending-of-neutron-energy/4263>\
**Category:** New Ideas\
**Created:** [May 14, 2024, 9:43am UTC](https://openmc.discourse.group/t/albedo-value-depending-of-neutron-energy/4263 "2024-05-14T09:43:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Icham](https://avatars.discourse-cdn.com/v4/letter/i/d2c977/32.png) [@Icham](https://openmc.discourse.group/u/Icham)\
**Post date:** [May 14, 2024, 9:43am UTC](https://openmc.discourse.group/t/albedo-value-depending-of-neutron-energy/4263/1 "2024-05-14T09:43:23Z")

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Hello,

I would like to use an albedo which depends on the neutron energy (like cross-sections data) instead of having an unique value for every neutron.

It is possible to have that in a future update ?

Thanks in advance

Regards

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**Author:** ![ykm](https://avatars.discourse-cdn.com/v4/letter/y/5f9b8f/32.png) [@ykm](https://openmc.discourse.group/u/ykm)\
**Post date:** [December 17, 2024, 2:34am UTC](https://openmc.discourse.group/t/albedo-value-depending-of-neutron-energy/4263/2 "2024-12-17T02:34:16Z")

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I’m looking forward to this feature as well

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**Author:** ![KUNG](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/kung/32/3725_2.png) [@KUNG](https://openmc.discourse.group/u/KUNG)\
**Post date:** [April 15, 2025, 1:13pm UTC](https://openmc.discourse.group/t/albedo-value-depending-of-neutron-energy/4263/3 "2025-04-15T13:13:40Z")

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Hi, I would be curious for which type of application that could be useful?

I was thinking about changing the albedo value on the outer boundaries of a 2D fuel assembly to reach keff =1 as an attempt of a leakage correction as in this paper: [DOI:10.5516/NET.2010.42.3.271](https://www.semanticscholar.org/paper/MONTE-CARLO-DEPLETION-UNDER-LEAKAGE-CORRECTED-VIA-Yun-Cho/2dce8ee4b87a51436580e758ac7c03885e3585d7).  
In this context, I was wondering myself if it was ok that the particle weights of all particles (regardless of energy) is changed the same way… or if there should be a dependence on energy (neutrons with high energy should have a higher leakage and therefore lower particle weight…)