Egle Tomasi Gustafsson
... • Recent and precise data on the proton time-like form factors measured by the BABAR collaboration show a systematic sinusoidal modulation in the near-threshold region. • The relevant variable is the momentum p associated to the relative motion of the final hadrons. • The periodicity and the simple ...
... • Recent and precise data on the proton time-like form factors measured by the BABAR collaboration show a systematic sinusoidal modulation in the near-threshold region. • The relevant variable is the momentum p associated to the relative motion of the final hadrons. • The periodicity and the simple ...
High-resolution Gamma-ray Spectroscopy at SPIRAL2
... These experimental open questions can be studied by exploring the nuclear spectrum of excited states up to medium-high angular momentum and by direct measurement of transition probabilities. Neutron-rich nuclei are much more difficult to access than their proton-rich counterparts. In particular it i ...
... These experimental open questions can be studied by exploring the nuclear spectrum of excited states up to medium-high angular momentum and by direct measurement of transition probabilities. Neutron-rich nuclei are much more difficult to access than their proton-rich counterparts. In particular it i ...
Bridging scales in nuclear physics
... nuclei. Despite the tremendous efforts put into modelling the hadron-hadron interaction and properties of atomic nuclei using Lattice-QCD, we are still far from a realistic result when computing the masses for even the lightest nuclei in this approach [1]. One reason why this reductionistic approach ...
... nuclei. Despite the tremendous efforts put into modelling the hadron-hadron interaction and properties of atomic nuclei using Lattice-QCD, we are still far from a realistic result when computing the masses for even the lightest nuclei in this approach [1]. One reason why this reductionistic approach ...
Summary - CED Engineering
... object. When dealing with this type of problem, we designate the acceleration, g, which equals 9.8m/sec2 or 32.17 ft/sec2 (g is called gravitational acceleration constant). Thus, equation 3-1 becomes F = mg for this case. ...
... object. When dealing with this type of problem, we designate the acceleration, g, which equals 9.8m/sec2 or 32.17 ft/sec2 (g is called gravitational acceleration constant). Thus, equation 3-1 becomes F = mg for this case. ...
Electromagnetic vacuum fluctuations, Casimir and Van der Waals
... the fact that the optical response of perfect mirrors is saturated : mirrors cannot reflect more than 100 % of the incoming light, whatever their atomic constitution may be. This makes an important difference between ideal Casimir forces and the Van der Waals forces, discussed below, which depend on ...
... the fact that the optical response of perfect mirrors is saturated : mirrors cannot reflect more than 100 % of the incoming light, whatever their atomic constitution may be. This makes an important difference between ideal Casimir forces and the Van der Waals forces, discussed below, which depend on ...
Review on Nucleon Spin Structure
... • The above relation tell us that the nucleon spin can be either solely attributed to the quark Pauli spin, as did in the last thirty years in CQM, and the nonrelativistic quark orbital angular momentum does not contribute to the nucleon spin; or • part of the nucleon spin is attributed to the rela ...
... • The above relation tell us that the nucleon spin can be either solely attributed to the quark Pauli spin, as did in the last thirty years in CQM, and the nonrelativistic quark orbital angular momentum does not contribute to the nucleon spin; or • part of the nucleon spin is attributed to the rela ...
Chapter 4- wrap up
... walking in a field, a sailboat gliding through the water, or an airplane cruising at 45,000 feet. ...
... walking in a field, a sailboat gliding through the water, or an airplane cruising at 45,000 feet. ...
Document
... 5. You are on a train. A baseball that is initially at rest in the aisle suddenly starts moving backwards without an applied force. Apply the definition of an inertial reference frame to explain what is happening. 6. Compare/contrast the physically measured quantities of mass and weight. 7. What is ...
... 5. You are on a train. A baseball that is initially at rest in the aisle suddenly starts moving backwards without an applied force. Apply the definition of an inertial reference frame to explain what is happening. 6. Compare/contrast the physically measured quantities of mass and weight. 7. What is ...
Force is not stored or used up. Because energy can be stored and
... Looking at a picture of a locomotive, l, we notice two obvious things that are different from an automobile. Where a car typically has two drive wheels, a locomotive normally has many — ten in this example. (Some also have smaller, unpowered wheels in front of and behind the drive wheels, but this e ...
... Looking at a picture of a locomotive, l, we notice two obvious things that are different from an automobile. Where a car typically has two drive wheels, a locomotive normally has many — ten in this example. (Some also have smaller, unpowered wheels in front of and behind the drive wheels, but this e ...
AP Physics – Friction
... Fs ≡ static force of friction If an object has a force applied to it but remains at rest, then fs = F. The static frictional force can have a max value of F. Moving objects require an applied force to keep them moving that overcomes the kinetic force of friction. Kinetic is based on a Greek word an ...
... Fs ≡ static force of friction If an object has a force applied to it but remains at rest, then fs = F. The static frictional force can have a max value of F. Moving objects require an applied force to keep them moving that overcomes the kinetic force of friction. Kinetic is based on a Greek word an ...
Nuclear force
The nuclear force (or nucleon–nucleon interaction or residual strong force) is the force between protons and neutrons, subatomic particles that are collectively called nucleons. The nuclear force is responsible for binding protons and neutrons into atomic nuclei. Neutrons and protons are affected by the nuclear force almost identically. Since protons have charge +1 e, they experience a Coulomb repulsion that tends to push them apart, but at short range the nuclear force is sufficiently attractive as to overcome the electromagnetic repulsive force. The mass of a nucleus is less than the sum total of the individual masses of the protons and neutrons which form it. The difference in mass between bound and unbound nucleons is known as the mass defect. Energy is released when nuclei break apart, and it is this energy that used in nuclear power and nuclear weapons.The nuclear force is powerfully attractive between nucleons at distances of about 1 femtometer (fm, or 1.0 × 10−15 metres) between their centers, but rapidly decreases to insignificance at distances beyond about 2.5 fm. At distances less than 0.7 fm, the nuclear force becomes repulsive. This repulsive component is responsible for the physical size of nuclei, since the nucleons can come no closer than the force allows. By comparison, the size of an atom, measured in angstroms (Å, or 1.0 × 10−10 m), is five orders of magnitude larger. The nuclear force is not simple, however, since it depends on the nucleon spins, has a tensor component, and may depend on the relative momentum of the nucleons.A quantitative description of the nuclear force relies on partially empirical equations that model the internucleon potential energies, or potentials. (Generally, forces within a system of particles can be more simply modeled by describing the system's potential energy; the negative gradient of a potential is equal to the vector force.) The constants for the equations are phenomenological, that is, determined by fitting the equations to experimental data. The internucleon potentials attempt to describe the properties of nucleon–nucleon interaction. Once determined, any given potential can be used in, e.g., the Schrödinger equation to determine the quantum mechanical properties of the nucleon system.The discovery of the neutron in 1932 revealed that atomic nuclei were made of protons and neutrons, held together by an attractive force. By 1935 the nuclear force was conceived to be transmitted by particles called mesons. This theoretical development included a description of the Yukawa potential, an early example of a nuclear potential. Mesons, predicted by theory, were discovered experimentally in 1947. By the 1970s, the quark model had been developed, which showed that the mesons and nucleons were composed of quarks and gluons. By this new model, the nuclear force, resulting from the exchange of mesons between neighboring nucleons, is a residual effect of the strong force.