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This paper presents the results obtained using an unbiased Population Based Search (PBS) for optimising Morse atomic clusters. PBS is able to repeatedly obtain all putative global minima for Morse clusters in the range 5 ≤ N ≤ 80, N = 147, ρ = 3, 6, 10, 14, as reported in the Cambridge Cluster Database. In addition, putative global minima have been established for Morse clusters in the range 81 ≤ N ≤ 146, ρ = 14. The PBS algorithm incorporates and extends key techniques that have been developeddoi:10.1109/cec.2010.5586213 dblp:conf/cec/Pullan10 fatcat:rumwjjoynrhwhkau4ju5w4eqve