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Nuclear Physics
Most commonly known for its applications in nuclear energy and nuclear weapons, Nuclear Physics also has applications in medicine and archaeology. This category is for questions about the branch of physics that deals with the study of the forces, reactions, and internal structures of atomic nuclei, Nuclear Physics.
3,164 Questions
In which direction does the electron rotate around the nucleus in an atom?
An electron doesn't have specific orbital path about an atomic nucleus. They move in specific energy levels that we identify as specific electron orbitals. But recall that the area where the electrons hang out is called the electron cloud. It's a "fuzzy zone" where electrons may be found. Electrons don't have specific routes about any atomic nucleus.
If you mean meter, you can't convert that. If you mean metric ton, each ton has 1000 kilogram. If you mean mega-ton (not a commonly used measure), a mega-ton would have a billion (a thousand million) kilograms.
What does physical appearance mean?
Physical appearance refers to the outward appearance of an individual, including features such as height, weight, hair color, facial structure, and body shape. It is how someone looks to others on a surface level.
What are the carbon emissions created by nuclear power stations?
Nuclear energy has a significant carbon cost of mining uranium fuel. This carbon cost is usually exported to another nation's mines. The actual carbon cost can be reduced by cutting safety in extremely poor countries, which leads to greater worker mortality but doesn't show up in the carbon budget.
The best nuclear ores are all mined. The true carbon cost of additional nuclear energy must be measured in the carbon cost of mining additional ores, not in the current average carbon cost of mining.
The carbon cost of the threat of terrorism incidents at nuclear plants is hard to calculate. Are we invading other countries because terrorist organizations will strike domestic nuclear power plants first? Also, would one successful terrorist incident instantly double the carbon cost of protecting all nuclear power plants?
We don't know how to measure the carbon cost of protecting people from nuclear waste for thousands of years. For example, the current U.S. policy on nuclear waste at the Hanford Military Reservation, which is in the floodplain of the Columbia River, is to leave the waste in place underground until it leaks into the river and is gone, or until a river flood overruns the area. This method of neglect produces a very small carbon footprint.
The decommissioning of reactors has a high carbon footprint. The carbon cost of decommissioning can be amortized over more years of electricity production by extending a nuclear plant's lifetime. However, old nuclear plants tend to have more radioactive leaks, and may have a slightly higher risk of a disaster.
The Ukraine has an issue where authorities have encased the disastrous Chernobyl reactor in a concrete casing and have abandoned the nearby city and region. Nuclear radiation has helped destroy the casing, and a new concrete tomb is planned. The entire region of Chernobyl is now threatened by fuel buildup on the forest floor. A forest fire would pump huge amounts of radiation into the air, which would cross national boundaries. Again, this storage problem's carbon footprint is low, simply because in case of a fire much of the isotope radiation would blow into some other country.
What we find is that the carbon footprint involved in generating nuclear energy and nuclear safety efforts are inextricably linked. The carbon costs in keeping people extremely safe from radiation would be enormous. Nuclear energy would be a net carbon sinkhole, where it would be more practical just to burn fossil fuels for electricity. If, however, many public health and safety shortcuts are taken by a government, especially by exporting safety problems or ignoring the mining and nuclear waste problems, nuclear energy has a much lower carbon footprint than just burning fossil fuels.
A:Early studies of the carbon footprint of nuclear power seem not to have included the construction, decommissioning, and waste disposal, which are always included in a total carbon footprint. Waste disposal is a particularly difficult area to deal with because no one know how it will be done, so no one knows what figures to use for carbon footprints. So estimates from studies dated 1998 to 2003 at the carbon footprint were all in the range of 11-13 grams of CO2 equivalent per kilowatt hour (g. CO2e/kWh). Four studies in 2004 and 2005, two of which agreed with the earlier estimates, produced an average figure of 43.5 CO2e/kWh. Five studies in 2006 produced an average of 84 CO2e/kWh. And three studies in 2007 produced an average of 93 g. CO2e/kWh for nuclear power. Since the earlier studies were clearly not addressing the total carbon footprint, and the later ones were, we can probably use a figure of 85 g. CO2e/kWh. An article by Benjamin Sovacool arrives at 65 g. CO2e/kWh, averaging the early and late numbers, but the earlier numbers are clearly wrong, despite the fact that they are much quoted.To put this into context, the following are average estimates of total greenhouse gasses by production type with numbers of grams of CO2e/kWh:
1000 - coal
900 - oil
750 - open cycle natural gas
580 - closed cycle natural gas
(closed cycle natural gas combined with co-generation might bring this down to 400 g. CO2e/kWh)
500 coal plant burning 50% coal with 50% miscanthus
110 - old solar photovoltaics
95 - biomass from miscanthus
85 - nuclear
40 - concentrated solar thermal with thermal storage
35 - new solar photovoltaics
25 - biomass from gasification of wood chips (used to fuel conventional natural gas turbines)
21 - wind
15 - hydroelectricity
<10 - geothermal doublet
These numbers come mostly from the Wikipedia article cited below. The figure for nuclear is extracted from the Sovacool article cited by using only studies dated after 2004. The figures for solar come from current solar literature as solar technology has changed a lot in the last ten years. The figures for biomass come from the UK Parliamentary Office of Science and Technology.
This places the carbon footprint of nuclear as 400% to 1600% of wind, hydro, solar, but about 15% of natural gas, and 8.5% of coal. Bear in mind that some estimates for the nuclear are much higher.
A:There is no direct release of carbon dioxide from the fissioning of uranium to make electricity. A:What must be recognized to make a proper accounting of the true carbon footprint is indeed, as stated above, the building of the plant. However that must be amortized over the life of the plant. If you do not amortize that input you cannot make an honest declaration. Furthermore, you must also consider same with regard to "eco-friendly" devices like windmills and solar panels; which in the case of the latter, has a fairly high carbon footprint with regard to plant building and manufacturing; But as with nuclear power, solar panel carbon footprint can be amortized lower over time. When considering only the raw materials and manufacturing/processing of both solar and nuclear raw material you find that the nuclear fuel's carbon footprint ends with delivery to the nuclear plant and renders an immediate carbon-free high BTU output which quickly surpasses the BTU inputs required in all the processing operations prior to the fuels use, while the solar panel, once installed, has to operate a significant amount time before its BTU output can match the inputs required for production let alone achieve the significantly high BTU input:output ratio that is found in nuclear energy. Without this consideration all other assertions are specious.Finally, the carbon footprint spent fuel disposal or reprocessing still does not change the BTU ratio significantly.
What are you and all the matter around you made of?
All matter, including you and everything around you, is made up of atoms. These atoms consist of protons, neutrons, and electrons. These particles come together to form different elements, which make up the substances we see and interact with in our everyday lives.
What is the nuclear equation for the beta decay of sodium-24?
The nuclear equation for the beta decay of sodium-24 is: [{}{11}^{24}\text{Na} \rightarrow {}{12}^{24}\text{Mg} + \beta^- + \bar{\nu}_e] where a neutron in the sodium nucleus is converted into a proton, releasing a beta particle (electron) and an antineutrino.
What do you mean by beta gamma rho?
Beta Gamma Rho could refer to a fraternity organization in the United States. It was founded in 1907 at the University of Illinois Urbana-Champaign and focuses on agriculture, food, and natural resources. Members typically pursue studies in agriculture-related fields and participate in social and professional development activities.
What is the process in which one initial reaction triggers a growing number of subsequent reactions?
That process is called a chain reaction. In a chain reaction, the products of one reaction act as reactants in the subsequent reactions, leading to a self-sustaining series of reactions. This can result in a rapid release of energy, as seen in nuclear reactions or certain chemical reactions.
Radiation, while it has negative connotations, can also be important for the treatment of some extreme diseases. It also is known to have value in changing chemical molecules, which is important for biological purposes.
What is the smallest particles of matter?
The smallest particles of matter are called atoms. Atoms are composed of protons, neutrons, and electrons.
What is the difference between induced fission and spontaneous fission?
Spontaneous Fission is the process of Elements and Induced Fission is the process of firing neutrons at heavy Atoms
What is the radioactive metal used in nuclear power plants?
Certain radioactive isotopes have an affinity or liking for certain body cells. Thus iodide given to a patient will bunch up and help machines "visualize" the thyroid so that a gland expert doctor can determine if there is something wrong.
Alpha radiation consists of particles with a charge of +2 and a mass of 4 amu, equivalent to a helium nucleus. Beta radiation consists of particles with a charge of either -1 or +1 and negligible mass, corresponding to electrons or positrons.
Why are gamma rays less ionising than alpha particles?
Gamma rays are less ionizing than alpha particles because alpha particles are charged and heavier, which causes them to interact more readily with atoms, creating a stronger ionization effect. In contrast, gamma rays are neutral and have high penetrating power, leading to fewer interactions with matter and thus lower ionization.
Why Annual dose limit for radiation workers was reduced from 5R to 2R?
The annual dose limit for radiation workers was reduced from 5R to 2R to better protect workers from potential health risks associated with radiation exposure. The new limit is based on updated scientific knowledge and recommendations to minimize the long-term effects of radiation exposure. This change reflects a more conservative approach to radiation safety in the workplace.
List the three main types of nuclear radiation in order of increasing ionizing ability?
Alpha, Beta, Gamma and cosmic are all examples of radiation.
Types of radiation could be:
Ionizing radiation
Electromagnetic radiation
Infra red radiation
The splitting of a heavy nucleus is called?
The splitting of a heavy nucleus is called nuclear fission. This process releases a large amount of energy and is the principle behind nuclear power plants and nuclear weapons.
If a nuclear bomb was detonated in Colorado would you feel it in Arizona?
That would depend on: * The location of the detonation. * Your location in Arizona. * The size of the detonation. For example: * Assume that it is a very large bomb that explodes in the Four Corners region of Colorado and you were standing in the Four Corners Region of Arizona a few feet away you can be assured that you would feel it even if only briefly before you were vaporized. * If you are comfortably seated in Yuma and a very tiny device were to Pop its Cork Northeast of Sterling near the Nebraska border you wouldn't notice a thing. When it comes to bombs Size really does matter. And like they say in real estate it all about Location Location Location.
Where does the electric field appear in a cyclotron?
The electric field in a cyclotron appears across the gap in the D's inside which the particles are accelerated. (There is a bit more to this, but not much.) Use the link below to a related question about the construction and operation of this nuclear particle accelerator.
The number of neutrons emitted during a fission reaction is characteristic of the isotope doing the fissioning, usually U-235 or Pu-239. It does not vary with any ambient condition like temperature or pressure, as it is determined by the properties of the nucleus. What you are thinking of, I believe, is the number of fissions occurring per second in a reactor. Each fission releases a fixed amount of energy, so the total number of fissions per second represents the power level of the reactor.
Emission of gamma rays does not change the atomic number of a nucleus?
Correct. Gamma rays are high-energy photons emitted by a nucleus undergoing a nuclear transition. Unlike alpha or beta decay, gamma emission does not change the atomic number or mass of the nucleus, as it is simply a way for the nucleus to release excess energy and transition to a lower energy state.
Explain what is meant by the natural abundance of isotopes?
If a substance is said to have a natural abundance of isotopes, it means the substance is found in large numbers in nature with an electric charge. Substances found in nature are usually electrically neutral.
2 things Rutherford discovered about the atom?
He found that the atom was made up of mostly empty space.
How many cyclotrons are there in the world?
There are about 150 to 200 cylotrons in the world. About 35 of these are operated by radiopharmaceutical companies and are used solely for the production of medical radioisotopes. Another 25 are used in part for radioisotope production. However, most of the above cyclotrons are not of sufficient power to produce large quantities of Iodine 123, which is the focus of Quasar Group's main initiative and to solve a severe shortage in the United States and to a lesser extent in Europe. The type of cyclotron that is needed for this project are 30 MeV (million electron volts) that can produce large quantities of Iodine 123 utilizing Xe 124 gas target systems. This method produces an extremely high purity product and is the most easily managed compared to lower energy production methods utilizing Te 123 solid targets.
