Half-life of Mn51

Half-life of Mn51 The half-life of Mn51 was measured by serial gamma spectrometry of the 511-keV annihilation photon following decay by β+ emission. Data were collected every 100 seconds for 100,000–230,000 seconds within each measurement (n=4). The 511-keV incidence rate was calculated from the 511-keV spectral peak area and count duration, corrected for detector dead time and radioactive decay. Least-squares regression analysis was used to determine the half-life of Mn51 while accounting for the presence of background contaminants, notably Co55. The result was 45.59±0.07 min, which is the highest precision measurement to date and disagrees with the current Nuclear Data Sheets value by over 6σ. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review C American Physical Society (APS)

Half-life of Mn51

Abstract

The half-life of Mn51 was measured by serial gamma spectrometry of the 511-keV annihilation photon following decay by β+ emission. Data were collected every 100 seconds for 100,000–230,000 seconds within each measurement (n=4). The 511-keV incidence rate was calculated from the 511-keV spectral peak area and count duration, corrected for detector dead time and radioactive decay. Least-squares regression analysis was used to determine the half-life of Mn51 while accounting for the presence of background contaminants, notably Co55. The result was 45.59±0.07 min, which is the highest precision measurement to date and disagrees with the current Nuclear Data Sheets value by over 6σ.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
0556-2813
eISSN
1089-490X
D.O.I.
10.1103/PhysRevC.96.014613
Publisher site
See Article on Publisher Site

Abstract

The half-life of Mn51 was measured by serial gamma spectrometry of the 511-keV annihilation photon following decay by β+ emission. Data were collected every 100 seconds for 100,000–230,000 seconds within each measurement (n=4). The 511-keV incidence rate was calculated from the 511-keV spectral peak area and count duration, corrected for detector dead time and radioactive decay. Least-squares regression analysis was used to determine the half-life of Mn51 while accounting for the presence of background contaminants, notably Co55. The result was 45.59±0.07 min, which is the highest precision measurement to date and disagrees with the current Nuclear Data Sheets value by over 6σ.

Journal

Physical Review CAmerican Physical Society (APS)

Published: Jul 18, 2017

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