Half-life of Mn51
Year: 2017
Type: article
Abstract: The half-life of $^{51}\mathrm{Mn}$ was measured by serial gamma spectrometry of the 511-keV annihilation photon following decay by ${\ensuremath{\beta}}^{+}$ 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 $^{51}\mathrm{Mn}$ while accounting for the presence of background contaminants, notably $^{55}\mathrm{Co}$. The result was $45.59\ifmmode\pm\else\textpm\fi{}0.07$ min, which is the highest precision measurement to date and disagrees with the current Nuclear Data Sheets value by over $6\ensuremath{\sigma}$.
Source: Physical Review C
Institution: University of Wisconsin–Madison
Language: Latvian
Subfield: Radiation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1742644352, G9000078504
OpenAlex ID: W2736761728