Development of Proton Detection System with Thin Ruby Scintillator Insensitive to Neutrons and Gamma Rays for Neutron Lifetime Measurement

2004 ◽  
Vol 43 (6A) ◽  
pp. 3582-3585 ◽  
Author(s):  
Yoneichi Hosono ◽  
Hitoshi Nihei ◽  
Masaharu Nakazawa
Keyword(s):  
Gamma Rays ◽  
Detection System ◽  
Lifetime Measurement ◽  
Proton Detection ◽  
Neutron Lifetime

Development of a Portable Detection System for Simultaneous Measurements of Neutrons and Gamma Rays

2020 ◽  
Vol 43 (6) ◽  
pp. 481-487
Author(s):  
Hui-Gyeong Kim ◽  
◽  
Yong-Ho Hong ◽  
Young-Seok Jung ◽  
Jae-Hyun Kim ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Detection System ◽  
Simultaneous Measurements ◽  
Portable Detection

scholarly journals Neutron lifetime measurement with the big gravitational trap for ultracold neutrons. Current state and future prospects.

2019 ◽  
Vol 1390 ◽  
pp. 012136
Author(s):  
A P Serebrov ◽  
E A Kolomensky ◽  
A K Fomin ◽  
I A Krasnoschekova ◽  
A V Vassiljev ◽  
...  
Keyword(s):  
Lifetime Measurement ◽  
Ultracold Neutrons ◽  
Future Prospects ◽  
Neutron Lifetime ◽  
Current State

scholarly journals Improved accuracy in the determination of the thermal cross section of ${}^{14}{\rm N}({\rm n},{\rm p}){}^{14}{\rm C}$ for neutron lifetime measurement

2019 ◽  
Vol 2019 (9) ◽  
Author(s):  
R Kitahara ◽  
K Hirota ◽  
S Ieki ◽  
T Ino ◽  
Y Iwashita ◽  
...  
Keyword(s):  
Cross Section ◽  
Lifetime Measurement ◽  
Reaction Cross ◽  
Proton Accelerator ◽  
Incident Neutron ◽  
Neutron Lifetime ◽  
The Cross ◽  
Thermal Cross Section ◽  
Improved Accuracy

Abstract In a neutron lifetime measurement at the Japan Proton Accelerator Complex, the neutron lifetime is calculated from the neutron decay rate and the incident neutron flux. The flux is obtained by counting the protons emitted from the neutron absorption reaction of ${}^{3}{\rm He}$ gas, which is diluted in a mixture of working gas in a detector. Hence, it is crucial to determine the amount of ${}^{3}{\rm He}$ in the mixture. In order to improve the accuracy of the number density of the ${}^{3}{\rm He}$ nuclei, we have suggested using the ${}^{14}{\rm N}({\rm n},{\rm p}){}^{14}{\rm C}$ reaction as a reference because this reaction involves similar kinetic energy to the $^3$He(n,p)$^3$H reaction and a smaller reaction cross section to introduce reasonable large partial pressure. The uncertainty of the recommended value of the cross section, however, is not satisfied with our requirement. In this paper we report the most accurate experimental value of the cross section of the $^{14}$N(n,p)$^{14}$C reaction at a neutron velocity of 2200 m s$^{-1}$, measured relative to the $^3$He(n,p)$^3$H reaction. The result was 1.868 $\pm$ 0.003 (stat.) $\pm$ 0.006 (sys.) b. Additionally, the cross section of the $^{17}$O(n,$\alpha$)$^{14}$C reaction at the neutron velocity is also redetermined as 249 $\pm$ 6 mb.

Pulsed-beam neutron-lifetime measurement

1988 ◽  
Vol 60 (11) ◽  
pp. 995-998 ◽  
Author(s):  
J. Last ◽  
M. Arnold ◽  
J. Döhner ◽  
D. Dubbers ◽  
S. J. Freedman
Keyword(s):  
Lifetime Measurement ◽  
Neutron Lifetime

Neutron lifetime measurement on setups with gravitational trap

2016 ◽  
Vol 61 (1) ◽  
pp. 139-143 ◽  
Author(s):  
A. P. Serebrov ◽  
A. K. Fomin ◽  
A. G. Kharitonov ◽  
V. E. Varlamov ◽  
E. A. Kolomenskiy ◽  
...  
Keyword(s):  
Lifetime Measurement ◽  
Neutron Lifetime

Neutron lifetime measurement with the UCN trap-in-trap MAMBO II

2010 ◽  
Vol 693 (3) ◽  
pp. 221-226 ◽  
Author(s):  
A. Pichlmaier ◽  
V. Varlamov ◽  
K. Schreckenbach ◽  
P. Geltenbort
Keyword(s):  
Lifetime Measurement ◽  
Neutron Lifetime

scholarly journals Improved Neutron Lifetime Measurement with UCNτ

2021 ◽  
Vol 127 (16) ◽  
Author(s):  
F. M. Gonzalez ◽  
E. M. Fries ◽  
C. Cude-Woods ◽  
T. Bailey ◽  
M. Blatnik ◽  
...  
Keyword(s):  
Lifetime Measurement ◽  
Neutron Lifetime
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