【摘要】 在核素坐标为S和H的稳定原子核素图中．找到了奇A上界核素的三点共线对称组．由此性质推测应存在 S和 H的坐标差 k等于１１时的奇 A上界核素，它可能是５７１３７ La或６５１５ Tb之一．又必须存在构成△ｋ为12的奇A上界核，它可能是５７１３３Ｌa和５８１３５Ｃｅ之一．这些核素在自然界的含量可能很少而未发现．更多还原

【Abstract】 The symmetric groups of three point collineation for odd A nuclide of upper limit are found in the S-H figure of stable nuclides. According to this property, there seem to be still an odd A nuclide of upper limit between undisacovered 57137La and 65157Tb when k= ll. there must be an odd A nuclide of upper limit between undiscovered 57135 La and 58135 Ce in order to satisfy △k = 2.更多还原