From 7ca82b59aa798bf2729e809c440d2630c718fb20 Mon Sep 17 00:00:00 2001
From: "Travis J. Labossiere-Hickman" <Travis.LabossiereHickman@INL.gov>
Date: Wed, 12 Apr 2023 12:22:45 -0600
Subject: [PATCH] Update the 2016 references to 2020

---
 openmc/data/data.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/openmc/data/data.py b/openmc/data/data.py
index 6793dff2ea..16c7ecf54c 100644
--- a/openmc/data/data.py
+++ b/openmc/data/data.py
@@ -207,8 +207,8 @@ _LOG_TWO = log(2.0)
 def atomic_mass(isotope):
     """Return atomic mass of isotope in atomic mass units.
 
-    Atomic mass data comes from the `Atomic Mass Evaluation 2016
-    <https://www-nds.iaea.org/amdc/ame2016/AME2016-a.pdf>`_.
+    Atomic mass data comes from the `Atomic Mass Evaluation 2020
+    <https://doi.org/10.1088/1674-1137/abddaf>`_.
 
     Parameters
     ----------