約75GeV以上の太陽粒子生成の証拠があります
1Physics Department, Colorado State University, Fort Collins, Colorado 80521, USA.
Nature
|June 30, 1972
まとめ
75GeV以上で観測された高エネルギー太陽粒子は,太陽フレアの初期段階における粒子加速の強力な証拠を提供します. この発見は,宇宙におけるエネルギー粒子現象の理解を深める.
科学分野:
- * 天体物理学
- * プラズマ物理学
- * 太陽物理学 太陽物理学
背景:
- *太陽フレアとは,太陽の表面から突然発生するエネルギーの爆発です.
- * 粒子加速メカニズムを理解することは,宇宙天候の予測に不可欠です.
- * これまでの研究は,低エネルギー粒子に焦点を当てていた.
研究 の 目的:
- * 太陽フレア中の粒子の加速を調査する.
- * 高エネルギー粒子生成の証拠を提供するため.
- * 75GeVを超えるエネルギーで発生する太陽粒子現象を分析する.
主な方法:
- *太陽粒子イベントからの観測データの分析.
- * GeV範囲の粒子エネルギーにフォーカスする.
- * 粒子観測と太陽フレア活動の相関.
主要な成果:
- *観測により,75GeV以上の太陽粒子の存在が確認されました.
- * これらの高エネルギー粒子は,加速の直接的な証拠を提供します.
- * 加速は,太陽フレアの初期段階と密接に関連しています.
結論:
- *太陽フレアでは,粒子を非常に高いエネルギー (>= 75 GeV) に加速させることができます.
- * フレアの初期段階は粒子加速の臨界期である.
- *これらの発見は,宇宙線や宇宙天候の理解に意味を持つ.
関連する概念動画
Nuclear Binding Energy
The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass defect indicates a “loss” in mass of 4.0331 amu – 4.0026 amu = 0.0305 amu. The loss in mass accompanying the formation of an atom from protons, neutrons, and electrons is due to the conversion of that mass into energy that is evolved as the atom forms. The nuclear binding energy is the energy produced when the atoms’ nucleons are bound together;...
Nuclear Fusion
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
Nuclear Transmutation
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed protons being...
Radiation Pressure: Problem Solving
The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
Fermi Level
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
Fermi Level Dynamics
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...


