Short Time-Variance Method for Prompt-Neutron-Lifetime Measurements

1965 ◽  
Vol 22 (2) ◽  
pp. 266-267 ◽  
Author(s):  
Nicola Pacilio
Keyword(s):  
Prompt Neutron ◽  
Neutron Lifetime ◽  
Lifetime Measurements ◽  
Variance Method ◽  
Time Variance ◽  
Short Time

scholarly journals A meta-analysis of neutron lifetime measurements

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Ashwani Rajan ◽  
Shantanu Desai
Keyword(s):  
Gaussian Distribution ◽  
Meta Analysis ◽  
Cauchy Distribution ◽  
Neutron Lifetime ◽  
Weighted Mean ◽  
Lifetime Measurements ◽  
Median Estimate ◽  
Error Distributions ◽  
Student’S T ◽  
Data Group

Abstract We calculate the median as well as weighted mean central estimates for the neutron lifetime from a subset of measurements compiled in the 2019 update of the Particle Data Group (PDG). We then reconstruct the error distributions for the residuals using three different central estimates and then check for consistency with a Gaussian distribution. We find that although the error distributions using the weighted mean as well as median estimate are consistent with a Gaussian distribution, the Student’s $t$ and Cauchy distribution provide a better fit. This median statistic estimate of the neutron lifetime from these measurements is given by $881.5 \pm 0.47$ seconds. This can be used as an alternate estimate of the neutron lifetime. We also note that the discrepancy between beam and bottle-based measurements using median statistics of the neutron lifetime persists with a significance between 4 $\sigma$ and 8 $\sigma$, depending on which combination of measurements is used.

Results of Neutron Lifetime Measurements with Gravitational UCN Trap

1991 ◽  
Author(s):  
V. P. Gudkov ◽  
A. G. Kharitonov ◽  
V. V. Nesvizhevsky ◽  
A. P. Serebrov ◽  
S. O. Sumbaev ◽  
...  
Keyword(s):  
Neutron Lifetime ◽  
Lifetime Measurements

Neutron lifetime measurements and analysis in a heterogeneous thermal reactor system

1993 ◽  
Author(s):  
Russell M. Ball ◽  
Gary S. Hoovler ◽  
Edward J. Parma ◽  
Elizabeth C. Selcow ◽  
Ralph J. Cerbone
Keyword(s):  
Reactor System ◽  
Thermal Reactor ◽  
Neutron Lifetime ◽  
Lifetime Measurements

Prompt neutron lifetime calculations for the NIRR-1 reactor

2015 ◽  
Vol 3 (2) ◽  
pp. 125-131 ◽  
Author(s):  
Yakubu V. Ibrahim ◽  
Micheal O. Adeleye ◽  
Raymond L. Njinga ◽  
Henry C. Odoi ◽  
Sunday A. Jonah
Keyword(s):  
Prompt Neutron ◽  
Neutron Lifetime

Calculation of the Prompt Neutron Lifetime in the NBSR

2006 ◽  
Vol 153 (1) ◽  
pp. 26-32 ◽  
Author(s):  
Albert L. Hanson ◽  
Hans Ludewig ◽  
David J. Diamond
Keyword(s):  
Prompt Neutron ◽  
Neutron Lifetime
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