Why in the News?
The KATRIN (Karlsruhe Tritium Neutrino Experiment) has made a groundbreaking achievement by measuring neutrino mass with a new precision.
About the KATRIN Experiment:
- The KATRIN is located at the Karlsruhe Institute of Technology (KIT), specifically on its Campus North site in Karlsruhe, Germany.
- It is aimed at measuring the mass of the electron antineutrino with sub-eV precision.
- It has measured the mass of neutrinos by studying the beta decay of tritium, a radioactive form of hydrogen.
- The mass was inferred by analyzing the energy of the emitted electrons.
- Technological Setup:
- A 70-meter-long beamline with a powerful tritium source.
- A 10-meter-wide spectrometer to measure the energy of emitted electrons with high precision.
- Key Findings:
- KATRIN has set a new upper limit for neutrino mass at less than 0.45 eV/c² (8 × 10⁻³⁷ kg), nearly twice as precise as previous measurements from 2022.
- Data Collection was based on five campaigns from 2019-2021, totalling 250 days of data.
Neutrinos and Their Properties
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| [UPSC 2010] India-based Neutrino Observatory is included by the planning commission as a mega-science project under the 11th Five-year plan. In this context, consider the following statements:
1.Neutrinos are chargeless elementary particles that travel close to the speed of light. 2.Neutrinos are created in nuclear reactions of beta decay. 3.Neutrinos have a negligible, but non-zero mass. 4.Trillions of Neutrinos pass through the human body every second. Which of the statements given above are correct? (a) 1 and 3 only (b) 1, 2 and 3 only (c) 2, 3 and 4 (d) 1, 2, 3 and 4 |
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