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[en] The concept is explained of nuclear forces, the methods are explained of the experimental study of nuclear forces and their division into Majorana forces, Heisenberg forces, Bartlett forces and Wigner forces. The basic concepts of the meson theory of nuclear forces are presented. (M.D.)
[en] The Laplacian nuclear force, investigated in Bulgaria last 30 Years, is in splendid agreement with the experiment. Thus it pretends to be the real basis of the theory of the nuclear forces. The basic points and results of nucleo-dynamics based on the new force are remembered. The paper shows how to use only the W-component of the nuclear Dirac equation and gives the basic principles of the used computer program in the case of np-scattering. A table of the obtained results is applied. (author)
[en] This short research paper addresses two topics that have emerged in the debate about whether, when, and how to modernize U.S. nuclear forces.1 The first topic relates to the size and scale of the planned nuclear force, with some critics of the modernization plan arguing that the United States is simply replicating the Cold War force for a very different era. The second topic relates to the cost of the modernization effort, with some critics arguing that the cost is unaffordable.2 This paper begins with a review of the changes in the size and scale of U.S. nuclear forces since the Cold War. It then examines the expected costs of modernization in a comparative perspective.
[en] Atom interferometry is a rapidly advancing field and this Letter proposes an experiment based on existing technology that can search for new short distance forces. With current technology it is possible to improve the sensitivity by up to a factor of 102 and near-future advances may be able to rewrite the limits for forces with ranges from 1 mm to 100 m.
[en] Recent advances in nuclear accelerators and experimental techniques have led to an increased ability to synthesize new isotopes. As isotopes are produced with more and more extreme combinations of neutrons and protons in their nuclei, new phenomena are observed, and the versatility of the nucleus is increased as a laboratory for studying fundamental forces. Among the newly discovered decay modes are proton radioactivity, triton, two-proton, two-neutron, and three-neutron decays that are β-delayed, as well as 14C emission in radioactive decay. Precise tests of the properties of the weak force have also been achieved
[en] The validity of the density-matrix expansion (DME) is investigated using two different interactions: the Brink and Boecker B1 force and the Campi-Sprung G-0 force. Simple parametrizations of the hamiltonian density are discussed and the connection between the DME and Skyrme-like forces is examined
[fr]La validite du developpement de la matrice-densite (DME) est testee en utilisant deux potentiels differents: la force B1 de Brink et Boecker et la force de Campi-Sprung G-0. On discute ensuite des parametrisations simples de la densite d'hamiltoniens; enfin le rapport entre la DME et les forces de type Skyrme est examine