proton capture वाक्य
उदाहरण वाक्य
मोबाइल
- Magnesium can be burned by proton capture reactions.
- These nuclides are then converted into p-nuclei through sequences of beta decays after the rapid proton captures ceased.
- Then the proton capture sequences continue.
- Recent scientific literature therefore suggests to use the term p-process only for the actual proton capture process, as it is customary with other nucleosynthesis processes in astrophysics.
- Under conditions encountered in astrophysical environments it is difficult to obtain p-nuclei through proton captures because the Coulomb barrier of a nucleus increases with increasing Proton number.
- It is possible to cover the region of the lightest nuclei up to 56 Ni within a second because both proton captures and beta decays are fast.
- Typically proton capture in the rp-process will compete with ( ?, p ) reactions, as most environments with a high flux of hydrogen are also rich in helium.
- A possible alternative would be to have a very large number of protons available to increase the effective number of proton captures per second without having to raise the temperature too much.
- Here, a series of ( p, ? ) reactions proceeds until either the beta decay of a nucleus is faster than a further proton capture, or the proton drip line is reached.
- In 1988, however, sales began to pick up and by early 1997, the various models of the Proton captured more that 80 per cent of the market of cars below the 1600cc engine capacity.
- Some speculated mechanisms for their formation include proton capture as well as photodisintegration, although 115 Sn might also be partially produced in the s-process, both directly, and as the daughter of long-lived 115 In.
- At the same time as B 2 FH, Alastair Cameron independently realized the necessity to add another nucleosynthesis process to neutron capture nucleosynthesis but simply mentioned proton captures without assigning a special name to the process.
- If the conditions required for this rapid proton capture are only present for a short time ( the timescale of explosive astrophysical events is of the order of seconds ), the waiting points limit or hamper the continuation of the reactions to heavier nuclei.
- Such proton captures on stable nuclides ( or nearly stable ), however, are not very efficient in producing p-nuclei, especially the heavier ones, because the electric charge increases with each added proton, leading to an increased repulsion of the next proton to be added, according to Coulomb's law.
- Such nuclei are called p-nuclei, and their origin is not yet well understood : some speculated mechanisms for their formation include proton capture as well as photodisintegration . 140 Ce is the most common isotope of cerium, as it can be produced in both the s-and r-processes, while 142 Ce can only be produced in the r-process.
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