From d3bc1669d3933d04898fa51e2030a8413b7f59bd Mon Sep 17 00:00:00 2001
From: GuySten <62616591+GuySten@users.noreply.github.com>
Date: Fri, 17 Jul 2026 15:40:16 +0300
Subject: [PATCH] Access element subshell map data only if it has atomic
 relaxation data (#4020)

---
 src/physics.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/physics.cpp b/src/physics.cpp
index dcc771329..4a8b4d368 100644
--- a/src/physics.cpp
+++ b/src/physics.cpp
@@ -359,8 +359,8 @@ void sample_photon_reaction(Particle& p)
     // Allow electrons to fill orbital and produce Auger electrons and
     // fluorescent photons. Since Compton subshell data does not match atomic
     // relaxation data, use the mapping between the data to find the subshell
-    if (settings::atomic_relaxation && i_shell >= 0 &&
-        element.subshell_map_[i_shell] >= 0) {
+    if (settings::atomic_relaxation && element.has_atomic_relaxation_ &&
+        i_shell >= 0 && element.subshell_map_[i_shell] >= 0) {
       element.atomic_relaxation(element.subshell_map_[i_shell], p);
     }