Powerpoint Slides
... Radioactive Decay If you start out with a sample of parent atoms (No), after some time there will be fewer because of radioactive decay into the daughter atoms. ...
... Radioactive Decay If you start out with a sample of parent atoms (No), after some time there will be fewer because of radioactive decay into the daughter atoms. ...
neutron star - The University of Chicago
... capable to remove some of the outer, less gravitationally-bound layers. This wave-driven mass loss happens preferentially in either low mass (yet still massive) stars or lower metallicity more massive stars. Within a few months to a decade prior to CC up to ~1 Msun of material can be expelled. ...
... capable to remove some of the outer, less gravitationally-bound layers. This wave-driven mass loss happens preferentially in either low mass (yet still massive) stars or lower metallicity more massive stars. Within a few months to a decade prior to CC up to ~1 Msun of material can be expelled. ...
Astronomy Learning Objectives and Study Questions for Chapter 13
... 5. As a massive star’s degenerate iron core collapses to nuclear density, core bounce creates a shock wave that blows the outer layers of the star apart as a _____. A. magnetar B. nova C. planetary nebula D. Type Ia supernova E. Type II supernova 6. When stars with initial masses between 8 and 25 M ...
... 5. As a massive star’s degenerate iron core collapses to nuclear density, core bounce creates a shock wave that blows the outer layers of the star apart as a _____. A. magnetar B. nova C. planetary nebula D. Type Ia supernova E. Type II supernova 6. When stars with initial masses between 8 and 25 M ...
оценка и стандартизация радионуклидных данных
... The p-process also produces in significant quantity several interesting radionuclides with relatively long half-lives, including 92Nb (T1/2 = 3.6 107 yr), 97Tc (T1/2 = 2.6 106 yr), 98Tc (T1/2 = 4.2106 yr), and 146Sm (T1/2 = 1.08 108 yr). In principle, if the production rates of these radioactive ...
... The p-process also produces in significant quantity several interesting radionuclides with relatively long half-lives, including 92Nb (T1/2 = 3.6 107 yr), 97Tc (T1/2 = 2.6 106 yr), 98Tc (T1/2 = 4.2106 yr), and 146Sm (T1/2 = 1.08 108 yr). In principle, if the production rates of these radioactive ...
1.3. Basic Principles of Nuclear Physics
... Leuven at the age of 17. In 1914, he interrupted his studies to serve as an artillery officer in the Belgian army for the duration of World War I. At the end of hostilities, he received the Military Cross with palms. After the war, he studied physics and mathematics, and began to prepare for priesth ...
... Leuven at the age of 17. In 1914, he interrupted his studies to serve as an artillery officer in the Belgian army for the duration of World War I. At the end of hostilities, he received the Military Cross with palms. After the war, he studied physics and mathematics, and began to prepare for priesth ...
Coursework 7 File
... that this is the typical energy associated with collisions between hydrogen nuclei at the centre of the Sun, leading to fusion reactions, calculate the distance of closest approach between two hydrogen nuclei, using the conservation of energy principle. The temperature at the centre of the Sun is ap ...
... that this is the typical energy associated with collisions between hydrogen nuclei at the centre of the Sun, leading to fusion reactions, calculate the distance of closest approach between two hydrogen nuclei, using the conservation of energy principle. The temperature at the centre of the Sun is ap ...
tire
... 2. A disk of gas orbiting a star or black hole. 3. The most common element in the universe and the major component of stars. 4. The bending of light from a distance star or galaxy by the gravity of a closer star, galaxy or galaxy cluster. 5. Large black holes found at the center of most galaxies. 6. ...
... 2. A disk of gas orbiting a star or black hole. 3. The most common element in the universe and the major component of stars. 4. The bending of light from a distance star or galaxy by the gravity of a closer star, galaxy or galaxy cluster. 5. Large black holes found at the center of most galaxies. 6. ...
Radioactivity - Miami Beach Senior High School
... and two neutrons (the nucleus of a helium atom). • Alpha particles move quickly and have a lot of kinetic energy. They can cause damage to the surface of a material, especially living tissue. They do not penetrate far because they are often trapped by solid materials. • Damage by alpha particles is ...
... and two neutrons (the nucleus of a helium atom). • Alpha particles move quickly and have a lot of kinetic energy. They can cause damage to the surface of a material, especially living tissue. They do not penetrate far because they are often trapped by solid materials. • Damage by alpha particles is ...
ASTRONOMY 12 Problem Set 4 – Due March 10, 2016 1) After
... field and is rotating so it may be a pulsar. What is the shortest period that pulsar ...
... field and is rotating so it may be a pulsar. What is the shortest period that pulsar ...
Document
... Stage 4 (low mass) A star like our Sun will contract, becoming a white dwarf, which slowly cools, changing color as it does, until it can no longer be seen a black dwarf. ...
... Stage 4 (low mass) A star like our Sun will contract, becoming a white dwarf, which slowly cools, changing color as it does, until it can no longer be seen a black dwarf. ...
12.748 Lecture 2 Cosmic Abundances, Nucleosynthesis and
... wave, perhaps produced by the explosion of another star. The compressed gas has enough gravitational selfattraction to begin to collapse on itself. This kind of inward collapse occurs on time scales of order centuries to millennia, depending on the nature of the original perturbation. Compression le ...
... wave, perhaps produced by the explosion of another star. The compressed gas has enough gravitational selfattraction to begin to collapse on itself. This kind of inward collapse occurs on time scales of order centuries to millennia, depending on the nature of the original perturbation. Compression le ...
The big bang left the universe with its first atoms
... supergiant stars. As the core of the supergiant becomes saturated with iron, its pressure and temperature increase. Eventually, the blackbody radiation from the core produces gamma rays powerful enough to break apart the iron atoms in the core. This further increases the pressure to a point where el ...
... supergiant stars. As the core of the supergiant becomes saturated with iron, its pressure and temperature increase. Eventually, the blackbody radiation from the core produces gamma rays powerful enough to break apart the iron atoms in the core. This further increases the pressure to a point where el ...
Where Did All The Elements Come From??
... supergiant stars. As the core of the supergiant becomes saturated with iron, its pressure and temperature increase. Eventually, the blackbody radiation from the core produces gamma rays powerful enough to break apart the iron atoms in the core. This further increases the pressure to a point where el ...
... supergiant stars. As the core of the supergiant becomes saturated with iron, its pressure and temperature increase. Eventually, the blackbody radiation from the core produces gamma rays powerful enough to break apart the iron atoms in the core. This further increases the pressure to a point where el ...
Nuclear Chemistry
... protons meld by a force of nature, different than gravity or electromagnetism, called the strong (nuclear) force. Because of the way this force binds the protons and neutrons together, the ratio of protons to neutrons is an issue. ...
... protons meld by a force of nature, different than gravity or electromagnetism, called the strong (nuclear) force. Because of the way this force binds the protons and neutrons together, the ratio of protons to neutrons is an issue. ...
Ch 21 Nuclear - coolchemistrystuff
... -Example 2: List the following elements in greatest to least stability: sodium-24, helium-4, calcium-40 helium-4 (two magic numbers, both even) > calcium-40 (one magic number, both even) > sodium-24 III. Rates of Radioactive Decay Half-life: the time required for half of a sample of a particular r ...
... -Example 2: List the following elements in greatest to least stability: sodium-24, helium-4, calcium-40 helium-4 (two magic numbers, both even) > calcium-40 (one magic number, both even) > sodium-24 III. Rates of Radioactive Decay Half-life: the time required for half of a sample of a particular r ...
大爆炸---宇宙的起源
... silicon burning starts at this point. Silicon burning entails the alpha process which creates new elements by adding the equivalent of one helium nucleus (two protons plus two neutrons) per step in the following sequence: (to Fe and Ni) ...
... silicon burning starts at this point. Silicon burning entails the alpha process which creates new elements by adding the equivalent of one helium nucleus (two protons plus two neutrons) per step in the following sequence: (to Fe and Ni) ...
Lecture 1: Welcome to Astronomy 106
... Very hot, dense layer of non-fusing hydrogen on the white dwarf surface Explosive onset of H fusion Nova explosion ...
... Very hot, dense layer of non-fusing hydrogen on the white dwarf surface Explosive onset of H fusion Nova explosion ...
Life Cycles of Stars
... megatons/second • Let’s relate that to human scales. What would that be at one kilometer distance? • 77 x 1015 tons/(150 x 106km)2 = 3 tons • Picture a truckload of explosives a km away giving off a one-second burst of heat and light to rival the Sun ...
... megatons/second • Let’s relate that to human scales. What would that be at one kilometer distance? • 77 x 1015 tons/(150 x 106km)2 = 3 tons • Picture a truckload of explosives a km away giving off a one-second burst of heat and light to rival the Sun ...
G030485-00 - DCC
... • Once formed, a star is powered by nuclear burning • Hydrogen and then Helium fuse togetherproducing energy (light and heat) and forming heavier elements ...
... • Once formed, a star is powered by nuclear burning • Hydrogen and then Helium fuse togetherproducing energy (light and heat) and forming heavier elements ...
helium
... temperature, T, don’t depend on what happened at earlier times and higher temperature ...
... temperature, T, don’t depend on what happened at earlier times and higher temperature ...
Word - The Chemistry Book
... emitted from a nucleus as it changes from an excited state to a ground energy state 2. Gamma rays are produced when nuclear particles undergo transitions in energy levels; beta and gamma rays are usually emitted together 3. Gamma emission usually follows other types of decay that leave the nucleus i ...
... emitted from a nucleus as it changes from an excited state to a ground energy state 2. Gamma rays are produced when nuclear particles undergo transitions in energy levels; beta and gamma rays are usually emitted together 3. Gamma emission usually follows other types of decay that leave the nucleus i ...
NUCLEAR CHEMISTRY
... 1. A reaction in which the material that starts the reaction is also one of the products and can start another reaction C. Critical Mass 1. The minimum amount of nuclide that provides the number of neutrons needed to sustain a chain reaction ...
... 1. A reaction in which the material that starts the reaction is also one of the products and can start another reaction C. Critical Mass 1. The minimum amount of nuclide that provides the number of neutrons needed to sustain a chain reaction ...
P-nuclei
p-Nuclei (p stands for proton-rich) are certain proton-rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s- or r-process.