Nd nuclides
mass #	weight
142	141.9075
143	142.9096
144	143.9099
145	144.9122
146	145.9127
148	147.9165
150	149.9207
Sm nuclides
mass #	weight
147	146.9146
148	147.9146
149	148.9169
150	149.917
152	151.9195
154	153.922