Nuclear Reactions in Space By Aria J. Velasquez
The Basics <ul><li>Energy in the stars comes from nuclear fusion. </li></ul><ul><li>There are three types of nuclear fusio...
Basics (cont’d.) <ul><li>Proton-proton fusion generally happens in young stars with an internal temperature <15 million Ke...
Proton-Proton Fusion <ul><li>Proton-proton fusion is the type of fusion that produces energy in the sun. </li></ul><ul><li...
Helium Fusion <ul><li>Helium fusion is what happens in the latter stages of red giant stars and red supergiant stars befor...
Carbon Cycle Fusion <ul><li>In carbon cycle fusion, a carbon-12 nucleus fuses with a proton to create nitrogen-13. </li></...
Works Cited <ul><li>InfoBarrel - How To Guides, DIY Articles & Barrels of Other Information . 28 Mar. 2009 <http://www.inf...
Works Cited <ul><li>Carbon Cycle of Nuclear Fusion.&quot;  Carbon Cycle of Nuclear Fusion . 28 Mar. 2009 <http://hyperphys...
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Nuclear Reactions In Space

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Nuclear Reactions In Space

  1. 1. Nuclear Reactions in Space By Aria J. Velasquez
  2. 2. The Basics <ul><li>Energy in the stars comes from nuclear fusion. </li></ul><ul><li>There are three types of nuclear fusion in stars: proton-proton fusion, helium fusion and carbon cycle fusion. </li></ul><ul><li>These types of fusion depend on the mass and age of a star. </li></ul>
  3. 3. Basics (cont’d.) <ul><li>Proton-proton fusion generally happens in young stars with an internal temperature <15 million Kelvin. </li></ul><ul><li>Helium fusion happens in stars with great mass and internal temperatures >100 million Kelvin. </li></ul><ul><li>Carbon cycle fusion happens in stars with internal temperatures between 15 million and 100 million Kelvin. </li></ul>
  4. 4. Proton-Proton Fusion <ul><li>Proton-proton fusion is the type of fusion that produces energy in the sun. </li></ul><ul><li>Process: </li></ul><ul><ul><li>Two protons fuse </li></ul></ul><ul><ul><li>One proton is transformed into a neutron to make a hydrogen isotope called deuterium </li></ul></ul><ul><ul><li>Deuterium fuses with another proton </li></ul></ul><ul><ul><li>The two helium nuclei fuse </li></ul></ul><ul><ul><li>An alpha particle forms and releases two protons </li></ul></ul>
  5. 5. Helium Fusion <ul><li>Helium fusion is what happens in the latter stages of red giant stars and red supergiant stars before they “die.” </li></ul><ul><li>In it, helium nuclei combine and become beryllium and later carbon. </li></ul>
  6. 6. Carbon Cycle Fusion <ul><li>In carbon cycle fusion, a carbon-12 nucleus fuses with a proton to create nitrogen-13. </li></ul><ul><li>A proton then decays and creates carbon-13. </li></ul><ul><li>Two more protons are added to make nitrogen-14 and oxygen-15. </li></ul><ul><li>A neutron decays to create nitrogen-15. </li></ul><ul><li>Finally, another proton is added which makes the element oxygen-16. An alpha particle is released and the carbon cycle starts over again. </li></ul>
  7. 7. Works Cited <ul><li>InfoBarrel - How To Guides, DIY Articles & Barrels of Other Information . 28 Mar. 2009 <http://www.infobarrel.com/media/image/655.jpg>. </li></ul><ul><li>&quot;Nuclear Reactions in Stars.&quot; Nuclear Reactions in Stars . 28 Mar. 2009 <http://hyperphysics.phy-astr.gsu.edu/HBASE/Astro/astfus.html>. </li></ul><ul><li>&quot;Proton-Proton Fusion.&quot; Proton-Proton Fusion . 28 Mar. 2009 <http://hyperphysics.phy-astr.gsu.edu/HBASE/Astro/procyc.html#c1>. </li></ul>
  8. 8. Works Cited <ul><li>Carbon Cycle of Nuclear Fusion.&quot; Carbon Cycle of Nuclear Fusion . 28 Mar. 2009 <http://hyperphysics.phy-astr.gsu.edu/hbase/Astro/carbcyc.html#c1>. </li></ul><ul><li>Federation of American Scientists . 04 Apr. 2009 <http://www.fas.org/irp/imint/docs/rst/Sect20/He-C.jpg>. </li></ul><ul><li>&quot;Helium Nuclear Fusion.&quot; Helium Nuclear Fusion . 28 Mar. 2009 <http://hyperphysics.phy-astr.gsu.edu/hbase/Astro/helfus.html>. </li></ul><ul><li>Nobelprize.org . 28 Mar. 2009 <http://nobelprize.org/nobel_prizes/physics/articles/fusion/images/cno-cycle.gif>. </li></ul>

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