“御用”防空洞位于院内宫廷核心区的东御花园假山下面，通过逼仄的入口走进防空洞，阴冷压抑的感觉扑面而来，空气中仿佛还能嗅到末代皇帝溥仪在这里躲避时的紧张气息。据了解，这座地下防空洞是专为溥仪及其家人躲避空袭而建，1939年竣工。四周全部采用钢筋混凝土结 ...

“御用”防空洞位于院内宫廷核心区的东御花园假山下面，通过逼仄的入口走进防空洞，阴冷压抑的感觉扑面而来，空气中仿佛还能嗅到末代皇帝溥仪在这里躲避时的紧张气息。据了解，这座地下防空洞是专为溥仪及其家人躲避空袭而建，1939年竣工。四周全部采用钢筋混凝土结 ...

University of Queensland scientists have cracked a long-standing puzzle in nuclear physics, showing that nuclear polarization ...

For decades, scientists believed that lead-208, a "doubly magic" and highly stable atomic nucleus, was perfectly spherical.

T he atomic nucleus is made up of protons and neutrons, particles that exist through the interaction of quarks bonded by gluons. It would seem, therefore, that it should not be difficult to ...

The experimental signature is interpreted as the protons and neutrons inside the atomic nucleus vibrating in a coordinated ...

So, the atomic number also equals the number of electrons orbiting the nucleus. But remember, there are no electrons inside the nucleus. This is the chemical symbol for chlorine, written with its ...

The IAEA's NUCLEUS information resource portal provides access to over 100 scientific, technical and regulatory resources, including databases, applications, publications and training material. As it ...

For decades, atomic clocks have been the pinnacle of precision timekeeping, enabling GPS navigation, cutting-edge physics ...

An element's atomic number defines it ... neutrons A = 64 Number of neutrons N = 64 - 30 = 34 Since this is a nucleus there are no electrons There are 30 protons and 34 neutrons.

The first direct measurement of the size of the neutrino, a fundamental particle, suggests they are at least larger than an atomic nucleus – but they could potentially be trillions of times larger.