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Why is the positron emitter more than beta emitter in medium nuclei?
Wiki User
∙ 12y ago
Electrons being negatively charged will be attracted by the protons within the nucleus and so they come after spending energy against the force of attraction. But positron being positively charged will be repelled by positively charged portons. Hence the energy difference between electron and positron emission in case of beta decay
Wiki User
∙ 12y ago
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What is a beta emitter?
In physics, an alpha emitter is a radioactive substance which decays by emitting alpha particles.
How does using a transistor with a different beta affect the operation of the common emitter amplifier?
Gain, in the common emitter amplifier, is beta (hFe) or collector resistance divided by emitter resistance, whichever is less. Substituting a different beta (hFe) transistor will affect gain, if hFe is less, or increase stability and design margin, if hFe is greater.
When the forward saturation in Bipolar junction transistor occurs?
Forward saturation in a BJT occurs when the ratio of collecter-emitter current and base-emitter current reaches hFe or dc beta. A that point, the BJT is no longer operating in linear mode.
What is meant by dependent source?
A dependent source is a source that is dependent on, i.e. a function of, some other thing in the circuit. Often, a transistor is represented as a dependent current source, with collector-emitter current being dependent on base-emitter current times hFe, or beta-gain, limited by the collector-emitter resistor network.
Define current gain of a common emitter configuration?
The voltage gain of a common emitter transitor amplifier is (inverted) collector resistor divided by emitter resistor, unless this would exceed hfe or the transistor is operating in non-linear mode.
Why positron emitter is more than beta emitter in medium nuclie?
Because there is more energy available, and beta+ decay requires an energy contribution, as opposed to beta-.
What is a beta emitter?
In physics, an alpha emitter is a radioactive substance which decays by emitting alpha particles.
Is an alpha a particle or a wave?
Beta is a particle. In beta- it is an electron and an electron antineutrino. In beta+ it is a positron and an electron neutrino.
Why are positrons produced from some nuclei but alpha or beta radiation come from other nuclei?
Positrons are a type of beta radiation (along with electons). Let's check things out to figure out why some nuclei are positron emitters. Positron emission (beta + decay) follows after the conversion of a neutron in an atomic nucleus into a proton. In atomic nuclei that have an excess number of neutrons to be stable, this is a common form of decay. It directly assists an unstable nucleus in getting closer to the "line of stability" of the N-Z plot. As beta + decay has a higher probablity for nuclei with excessive numbers of neutrons, beta - decay has a higher probability for nuclei with shortages of neutrons. In general, alpha decay is reserved for the heaviest radionuclides. We see radium, uranium, plutonium and a number of other elements from the upper end of the periodic table as having alpha decay as a possibility among their methods of decay. Links can be found below.
What is the composition of a beta particle?
A beta particle is either an electron or an anti-electron (aka positron).
Which radioisotope is a beta emitter?
90-Sr is the answer.
What are the properties of an Beta particle?
A beta particle is an electron (or positron) with high energy and speed.
What is a balanced equation for positron decay of Mercury 188?
The equation for the positive beta decay of 188Hg is: 80188Hg --> 79188Au + 10e where e indicates a positron or positive beta particle.
What is the symbol for a positron?
A positron is the antiparticle of the electron. We write the electron as e- as it is negatively charged. We write e+ or β+ for the positron. The latter symbol uses the Greek letter beta as positron emission is one of the two forms of the radioactive decay known as beta decay. Links can be found below.
When is the decay particle beta?
A beta particle is either an electron, or a positron (aka "anti-electron").
How many nucleons does a beta particle have?
None. A beta particle consists of a single electrons or positron.
What is alpha radiation made of?
Beta particles are made of either electrons (or their opposite particle - positrons). They are emitted from certain atomic nuclei in the process of radioactive decay. Electrons and positrons are considered one of a class of subatomic particles called "Elementary Particles". Elementary particles are believed to have no further substructure, and are therefore made only of energy by the formula E= mc^2.
