Publication

12C(n, n), (n, n') and (n, n') 3a reactions at 14.1 MeV

1969
Theses

Abstract

The 12C(n, n), (n, n') and (n, n') 3 α reactions have been studied at 14.1 MeV by a time-of-flight method, with a scintillating scatterer. The angular distributions and integrated cross sections were obtained for the following channels: Q = 0 (0+) and -4.43 MeV (2+) for angles greater than 50°; Q = -7,66 MeV (0+) (8.5 ±2 mb), - 9.63 MeV (3-) (62.5 ±5 mb), - 10.1 MeV (0+ or 2+) (maximum 55 mb) and - 10.84 MeV (1-) (13-17 mb) over the whole angular range; -11.82 MeV (2-) (3-7 mb) for angles smaller than 60°. At low scattered neutron energies a continuum was observed for which the cross section ( ≈ 100 mb, including the scattering to the broad level at 10,1 MeV) and the angular distribution were determined.

Official source

https://infoscience.epfl.ch/entities/publication/81433a91-8f98-49d9-a3dc-9efa86830b2b

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1969
Theses

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/81433a91-8f98-49d9-a3dc-9efa86830b2b

About this result

Related concepts (32)

Cross section (physics)

In physics, the cross section is a measure of the probability that a specific process will take place when some kind of radiant excitation (e.g. a particle beam, sound wave, light, or an X-ray) intersects a localized phenomenon (e.g. a particle or density fluctuation). For example, the Rutherford cross-section is a measure of probability that an alpha particle will be deflected by a given angle during an interaction with an atomic nucleus. Cross section is typically denoted σ (sigma) and is expressed in units of area, more specifically in barns.

Neutron cross section

In nuclear physics, the concept of a neutron cross section is used to express the likelihood of interaction between an incident neutron and a target nucleus. The neutron cross section σ can be defined as the area in cm2 for which the number of neutron-nuclei reactions taking place is equal to the product of the number of incident neutrons that would pass through the area and the number of target nuclei. In conjunction with the neutron flux, it enables the calculation of the reaction rate, for example to derive the thermal power of a nuclear power plant.

Angle

In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays are also known as plane angles as they lie in the plane that contains the rays. Angles are also formed by the intersection of two planes; these are called dihedral angles. Two intersecting curves may also define an angle, which is the angle of the rays lying tangent to the respective curves at their point of intersection.

Related publications (11)

12C(n, n), (n, n') and (n, n') 3a reactions at 14.1 MeV

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