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Neutron lifetime measurement with pulsed cold neutrons

by Sumi, N , Yoshioka, T , Iwashita, Y , Ino, T , Seki, Y , Morishita, A , Shimizu, H M , Koga, J , Yamada, T , Yokohashi, M , Ieki, S , Oide, H , Yamashita, S , Otono, H , Ichikawa, G , Shima, T , Sumino, H , Kitahara, R , Yano, K , Sekiba, D , Nagakura, N , Tomita, T , Uehara, H , Morikawa, K , Hirota, K , Kitaguchi, M , Mogi, T , Mishima, K , Okabe, H

in Experiments / Gas detectors / Lifetime / Neutrons / Particle physics

2020

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Neutron lifetime measurement with pulsed cold neutrons

in Experiments / Gas detectors / Lifetime / Neutrons / Particle physics

2020

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Neutron lifetime measurement with pulsed cold neutrons

in Experiments / Gas detectors / Lifetime / Neutrons / Particle physics

2020

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Journal Article

Neutron lifetime measurement with pulsed cold neutrons

Sumi, N,

Yoshioka, T,

Iwashita, Y,

Ino, T,

Seki, Y,

Morishita, A,

Shimizu, H M,

Koga, J,

Yamada, T,

Yokohashi, M,

Ieki, S,

Oide, H,

Yamashita, S,

Otono, H,

Ichikawa, G,

Shima, T,

Sumino, H,

Kitahara, R,

Yano, K,

Sekiba, D,

Nagakura, N,

Tomita, T,

Uehara, H,

Morikawa, K,

Hirota, K,

Kitaguchi, M,

Mogi, T,

Mishima, K,

Okabe, H

2020

Overview

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, the working gas of which contains diluted $^3$He. The measured neutron lifetime was $898\\,\\pm\\,10\\,_{\\rm stat}\\,^{+15}_{-18}\\,_{\\rm sys}\\,$s.

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Oxford University Press

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