What is neutrino flux?

Neutrinos are nearly massless and weakly interacting fundamental particles that can travel millions of light-years unperturbed. A measurement of the intensity of such a neutrino stream is known as a neutrino flux.

What is the expected neutrino flux at Earth?

1011 per square centimeter per second
The flux of solar neutrinos at the earth’s surface is on the order of 1011 per square centimeter per second. Unfortunately the fact that neutrinos escape so easily from the sun implies that they are difficult to capture.

How many neutrinos are produced per second?

∼2 * 10^38 electron neutrinos will be produced per second. As it is well known,neutrino is a particle proposed by Pauli ,to take care of keeping the consevation laws valid in beta-dacy(Nuclear weak interaction).

How are neutrinos formed in stars?

When the core of a massive star collapses, it crushes the protons and electrons together and neutrinos form. p + e → n + ν. The neutrinos pass straight through the collapsing star before the explosion takes place. This is why the neutrinos where detected before the supernova was visibly observed.

How many neutrinos does a supernova produce?

It’s predicted that a supernova in our galaxy could result in 5,000 to 8,000 neutrino events in a single detector.

How do neutrinos cause supernova?

When the core reaches about 1.5 times the mass of the Sun, it collapses under the influence of its own gravity and forms a neutron star. Enormous amounts of energy are released in this catastrophic event, mostly by the emission of neutrinos. The thus released radioactive energy makes a supernova shine bright for years.

What is the size of a neutrino?

Put another way, a neutrino is 10 billion, billion, billion times smaller than a grain of sand. This is already shocking; physicists’ best model of the universe (called the Standard Model) predicts that neutrinos should be massless.

What happened to the solar neutrinos?

Solar neutrinos have been detected since 1967, pioneered by Raymond Davis, Jr., using a chlorine tank in the Homestake Gold Mine in South Dakota, but the observed count rate was about one-third of the theoretically expected value, causing the puzzling neutrino problem that persisted for the next 35 years.

Why is the electron neutrino lighter than the other mass neutrinos?

The electron is much lighter than the muon and tau particles, so it seems normal that the mass neutrino that usually shows up as an electron neutrino would be lighter than the other mass neutrinos. Put another way, the electron neutrino is mostly made up of the neutrino mass state that is the lightest of the mass states.

How many neutrinos are in the universe?

They are the second most abundant particle in the universe (after particles of light called photons). Neutrinos rarely interact with anything—a lightyear of lead would stop only about half of the neutrinos coming from the sun. About 15 billion neutrinos from the Big Bang are in the average room.

What are neutrinos and how do they work?

Neutrinos are members of the same group as the most famous fundamental particle, the electron (which is powering the device you’re reading this on right now). But while electrons have a negative charge, neutrinos have no charge at all. Neutrinos are also incredibly small and light. They have some mass, but not much.