From 14c783564f9b5521e4e54797b9ff62e7af9ee421 Mon Sep 17 00:00:00 2001
From: Leander Schlegel <Leander.Schlegel@Rub.de>
Date: Tue, 21 May 2024 14:41:11 +0200
Subject: [PATCH] small optimization for case of haveSecondaries=False, as
 pointed out by Julien

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

diff --git a/src/module/EMInverseComptonScattering.cpp b/src/module/EMInverseComptonScattering.cpp
index 55c7637b5..c15d689d6 100644
--- a/src/module/EMInverseComptonScattering.cpp
+++ b/src/module/EMInverseComptonScattering.cpp
@@ -189,9 +189,9 @@ void EMInverseComptonScattering::performInteraction(Candidate *candidate) const
 	double Enew = distribution.sample(E, s);
 
 	// add up-scattered photon
-	double Esecondary = E - Enew;
-	double f = Enew / E;
 	if (havePhotons) {
+		double Esecondary = E - Enew;
+		double f = Enew / E;
 		if (random.rand() < pow(1 - f, thinning)) {
 			double w = 1. / pow(1 - f, thinning);
 			Vector3d pos = random.randomInterpolatedPosition(candidate->previous.getPosition(), candidate->current.getPosition());