% 1 - ορισμός. Τι είναι το (n-p) reaction
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Τι (ποιος) είναι (n-p) reaction - ορισμός

NUCLEAR REACTION
Np reaction

(n-p) reaction         
The (n-p) reaction, or (n,p) reaction, is an example of a nuclear reaction. It is the reaction which occurs when a neutron enters a nucleus and a proton leaves the nucleus simultaneously.
https://en.wikipedia.org/wiki/(n-p)_reaction
P–n junction         
  • A silicon p–n junction in reverse bias.
  • PN junction operation in forward-bias mode, showing reducing depletion width.
  • '''Figure B.''' A p–n junction in thermal equilibrium with zero-bias voltage applied. Under the junction, plots for the charge density, the electric field, and the voltage are reported. (The log concentration curves should actually be smoother, like the voltage.)
  • '''Figure A.''' A p–n junction in thermal equilibrium with zero-bias voltage applied. Electron and hole concentration are reported with blue and red lines, respectively. Gray regions are charge-neutral. Light-red zone is positively charged. Light-blue zone is negatively charged. The electric field is shown on the bottom, the electrostatic force on electrons and holes and the direction in which the diffusion tends to move electrons and holes. (The log concentration curves should actually be smoother with slope varying with field strength.)
  • [[Silicon]] atoms (Si) enlarged about 45,000,000x.
SEMICONDUCTOR–SEMICONDUCTOR JUNCTION, FORMED AT THE BOUNDARY BETWEEN A P-TYPE AND N-TYPE SEMICONDUCTOR
P-N junction; Reverse bias; Reverse-biased; Idiot Diode; P–N junction; PN junction; Pn junction; Pn-junction; Single-junction cell; P-n; Semiconductor junction; Pn Junction; Formation of a p-n Junction; P-n junction
A p–n junction is a boundary or interface between two types of semiconductor materials, p-type and n-type, inside a single crystal of semiconductor. The "p" (positive) side contains an excess of holes, while the "n" (negative) side contains an excess of electrons in the outer shells of the electrically neutral atoms there.
https://en.wikipedia.org/wiki/P–n_junction
p-n junction         
  • A silicon p–n junction in reverse bias.
  • PN junction operation in forward-bias mode, showing reducing depletion width.
  • '''Figure B.''' A p–n junction in thermal equilibrium with zero-bias voltage applied. Under the junction, plots for the charge density, the electric field, and the voltage are reported. (The log concentration curves should actually be smoother, like the voltage.)
  • '''Figure A.''' A p–n junction in thermal equilibrium with zero-bias voltage applied. Electron and hole concentration are reported with blue and red lines, respectively. Gray regions are charge-neutral. Light-red zone is positively charged. Light-blue zone is negatively charged. The electric field is shown on the bottom, the electrostatic force on electrons and holes and the direction in which the diffusion tends to move electrons and holes. (The log concentration curves should actually be smoother with slope varying with field strength.)
  • [[Silicon]] atoms (Si) enlarged about 45,000,000x.
SEMICONDUCTOR–SEMICONDUCTOR JUNCTION, FORMED AT THE BOUNDARY BETWEEN A P-TYPE AND N-TYPE SEMICONDUCTOR
P-N junction; Reverse bias; Reverse-biased; Idiot Diode; P–N junction; PN junction; Pn junction; Pn-junction; Single-junction cell; P-n; Semiconductor junction; Pn Junction; Formation of a p-n Junction; P-n junction
¦ noun Electronics a boundary between p-type and n-type material in a semiconductor device, functioning as a rectifier.

Βικιπαίδεια

(n-p) reaction

The (n-p) reaction, or (n,p) reaction, is an example of a nuclear reaction. It is the reaction which occurs when a neutron enters a nucleus and a proton leaves the nucleus simultaneously.

For example, sulfur-32 (32S) undergoes an (n,p) nuclear reaction when bombarded with neutrons, thus forming phosphorus-32 (32P).

The nuclide nitrogen-14 (14N) can also undergo an (n,p) nuclear reaction to produce carbon-14 (14C). This nuclear reaction 14N (n,p) 14C continually happens in the Earth's atmosphere, forming equilibrium amounts of the radionuclide 14C.

Most (n,p) reactions have threshold neutron energies below which the reaction cannot take place as a result of the charged particle in the exit channel requiring energy (usually more than a MeV) to overcome the Coulomb barrier experienced by the emitted proton. The (n,p) nuclear reaction 14N (n,p) 14C is an exception to this rule, and is exothermic – it can take place at all incident neutron energies. The 14N (n,p) 14C nuclear reaction is responsible for most of the radiation dose delivered to the human body by thermal neutrons – these thermal neutrons are absorbed by the nitrogen 14N in proteins, causing a proton to be emitted; the emitted proton deposits its kinetic energy over a very short distance in the body tissue, thereby depositing radiation dose.

https://en.wikipedia.org/wiki/(n-p) reaction
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