Abstract
We report here about measurements of reaction and decay Q values by precise determination of pairs of atomic masses. These were performed with the Penning trap mass spectrometer SMILETRAP. Measurements with Penning traps give reliable and accurate masses, in particular Q values, due to the fact that certain systematic errors to a great deal cancel in the mass difference between the two atoms defining the Q value. Some Q values that are of fundamental interest will be discussed here, for example, a new Q value for the 6Li (n, γ) 7Li reaction, for the β-decay of tritium, related to properties of the electron neutrino mass, and for the neutrino-less double β-decay of 76Ge, related to the question of whether the neutrino is a Majorana particle or not. In case of the latter two we report the most accurate Q values, namely 18,589.8 (12) eV for the tritium decay and 2,038.997 (46) keV for the neutrino-less double β-decay of 76Ge.
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Schuch, R. et al. (2007). Q value related mass determinations using a Penning trap. In: Dilling, J., Comyn, M., Thompson, J., Gwinner, G. (eds) TCP 2006. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73466-6_30
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DOI: https://doi.org/10.1007/978-3-540-73466-6_30
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