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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
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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.
Why are positrons produced from some nuclei but alpha or beta radiation come from other nuclei?
Positrons are produced through the process of beta-plus decay, where a proton in the nucleus is transformed into a neutron, releasing a positron and a neutrino. Alpha and beta radiation result from different decay processes: alpha radiation is the emission of a helium nucleus from the nucleus, while beta radiation involves the emission of electrons (beta-minus) or positrons (beta-plus) from the nucleus.
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.
Does a beta particle have an identical charge to an electron?
Yes, a beta particle is either an electron or a positron. In beta decay, an electron is emitted (beta-minus decay), which has a negative charge, while a positron is emitted in beta-plus decay, which has a positive charge.
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 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.
The beta rays emitted from atomic nuclei?
There are two beta decay schemes. Beta- involves changing a neutron into a proton and emitting an electron and an electron antineutrino. Beta+ involves changing a proton into a neutron and emitting a positron and an electron neutrino. There are other steps and factors involved, but that is the simple explanation.
What does the e represent in beta decay equations?
The "e" in beta decay equations represents an electron. In beta decay, a neutron in the nucleus is converted into a proton, releasing an electron and an antineutrino (or a positron and a neutrino in positron decay).
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.
