Kr-Kr config file (#8)

* Kr-Kr config file

* Kr-Kr config fix comment

Co-authored-by: marianna.mazzilli@cern.ch <mmazzill@aliceml.cern.ch>

Author: mmazzilli

MC/config/common/pythia8/generator/pythia8_KrKr.cfg

@@ -0,0 +1,16 @@
+### beams
+Beams:idA 1000822080		# Pb
+Beams:idB 1000822080		# Pb
+1000360840:all 84Kr 84Krbar 10 108 0 83.798
+Beams:eCM 6460. 		# GeV
+
+### heavy-ion settings (valid for Kr-Kr 6460 only)
+HeavyIon:SigFitNGen 0
+HeavyIon:SigFitDefPar 13.88,1.84,0.22,0.0,0.0,0.0,0.0,0.0
+HeavyIon:bWidth	11.		# impact parameter from 0-x [fm]
+
+### processes (apparently not to be defined)
+
+### decays
+ParticleDecays:limitTau0 on	
+ParticleDecays:tau0Max 0.001