Neutron lifetime measurement with pulsed cold neutrons

Abstract

The neutron lifetime has been measured by comparing the decay rate with the reaction rate of ${}^3$He nuclei of a pulsed neutron beam from the spallation neutron source at the Japan Proton Accelerator Research Complex (J-PARC). The decay rate and the reaction rate were determined by simultaneously detecting electrons from the neutron decay and protons from the ${}^3$He(n,p)${}^3$H reaction using a gas chamber of which working gas contains diluted ${}^3$He. The measured neutron lifetime was $898\pm 10{}_{\mathrm{stat}}{}_{-18}^{+15}{}_{\mathrm{sys}}$s.

arXiv comment28 pages, 20 figures, will be submitted to PTEP

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Cited by in corpus (15)

• Particle Physics at the European Spallation Source
• Precise Measurements of the Decay of Free Neutrons
• Search for explanation of the neutron lifetime anomaly
• Neutron Dark Decay
• Neutron lifetime anomaly and mirror matter theory
• Helium film may greatly increase the storage time of ultracold neutrons in material traps
• On the possibility of a significant increase in the storage time of ultracold neutrons in traps coated with a liquid helium film
• F-mode Oscillations of Neutron Stars with Dark Matter from Neutron Decay: Implications for Gravitational-Wave Detectability
• Measurement of $\gamma$ rays from ${}^6$LiF tile as an inner wall of a neutron-decay detector
• Improving of ultracold neutron traps coated with liquid helium using capillarity and electric field
• Shedding Light on Dark Sectors with Gravitational Waves
• Formulation of causality-preserving quantum time of arrival theory
• Detection of molecular hydrogen in a neutron beam lifetime experiment
• A method for measuring deviation from Lambert diffuse scattering law of ultracold neutrons on material walls
• Ultra-cold neutron simulation framework for the free neutron lifetime experiment $\tau$SPECT