An international joint research group of the Renike Accelerator Research Center of the Japan Institute of Physical Chemistry uses a Heavy Ion Accelerator Facility (RIBF) to perform the low-lying excited states of nuclei 98 and 100 (proton number 36, number of neutrons 62 and 64, respectively). After the study, it was found that there were two kinds of different shapes coexisting in the nucleus of Nb 98. Protons and neutrons in the nucleus are bound together by strong interactions and intertwined to form atomic nuclei. The shape of the nucleus is determined by the symmetry of the nucleus and its energy. In the case that both the number of protons and the number of neutrons are magic numbers, the energy inside the nucleus is the lowest in the spherically symmetric state, and the nucleus is spherical. As the number of protons and neutrons inside the nucleus changes, the shape of the nucleus changes to an ellipsoidal shape, with the appearance of oblate ellipsoid (disc) and long ellipsoid (olive) shapes. There are two kinds of coexistence phenomena in the nucleus. For example, when the number of A-type nuclei changes to the B-type when the number of its nuclei increases, some of the nuclei will show both Type A and Type B. This phenomenon is called "shape coexistence." The simultaneous existence of different shapes is a quantum phenomenon that only occurs in atomic nuclei, and such nuclei are rare. The coexistence of shapes is very important for observing the symmetry changes inside the nucleus. The discovery and study of the coexistence of the shape of the atomic nuclei is one of the important topics in nuclear research. Previous studies have shown that when the number of neutrons reaches 60, the shape of zirconium nuclei with a proton number of 38 and proton number 40 changes drastically, but the nuclei of protons with a proton number of 36 do not change significantly. This time, the team used RIBF to observe the nucleus 98 and æ°ª100 nuclei with neutron numbers over 60, and by comparing the nuclear excited state energy levels obtained from observation gamma rays with theoretical calculations, they found that the yttrium 98 nucleus has long ellipsoids. The phenomenon of mixed coexistence of spherical and oblate ellipsoids. The research results were recently published in the "Physical Review Express" online version. (Reporter Chen Chao) Diamond Electroplated Grinding Wheel DIY,special Guanghan Longrun Science and Trade Technology Trade Co., Ltd. , https://www.kairungongju.com