A helium-filled time projection chamber for a neutron lifetime measurement
References (5)
Rep. Prog. Phys.
(1982)
Cited by (10)
New physics searches in nuclear and neutron β decay
2019, Progress in Particle and Nuclear PhysicsLiNA – Lifetime of neutron apparatus with time projection chamber and solenoid coil
2017, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentCitation Excerpt :However, there is a 1% discrepancy, i.e., 8.4±2.2 s, between two methods: counting surviving ultra-cold neutrons after storing (879.6±0.8 s [2–6]), and counting trapped protons from the neutron β-decay (888.0±2.1 s [7,8]). The experiment proposed in this paper employs an electron-counting method, based on experiments at the ILL (Grenoble/France) [9–11] and at J-PARC (Tokai/Japan) [12–16]. Pulsed cold neutron beams pass through a time projection chamber (TPC) filled with a gas mixture of 4He:CO2:3He=85 kPa:15 kPa:100 mPa, which allows to detect not only electrons from the neutron β-decay but also to measure the neutron flux by admixture of 3He since according to the 3He(n,p)3H reaction a neutron captured in 3He emits a 573 keV proton and a 191 keV triton.
Development of time projection chamber for precise neutron lifetime measurement using pulsed cold neutron beams
2015, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentThe measurement of the beta asymmetry in the decay of polarized neutrons
1997, Nuclear Physics AA new measurement of the beta emission asymmetry in the free decay of polarized neutrons
1995, Physics Letters BA monochromatized chopped beam of cold neutrons for low background experiments
1993, Nuclear Inst. and Methods in Physics Research, A