Anharmonicity of internal atomic oscillation and effective antineutrino mass evaluation from gaseous molecular tritium \beta -decay
| Autor: | Nikita A. Titov, Alexey V. Lokhov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Nuclear and High Energy Physics 010308 nuclear & particles physics Oscillation Anharmonicity Ab initio Zero-point energy Interatomic potential Rotational–vibrational spectroscopy 01 natural sciences Physics - Atomic Physics High Energy Physics - Experiment High Energy Physics - Phenomenology 0103 physical sciences Phenomenological model Physics::Atomic and Molecular Clusters Atomic physics Physics::Chemical Physics 010306 general physics KATRIN |
| Popis: | Data analysis of the next generation effective antineutrino mass measurement experiment KATRIN requires reliable knowledge of systematic corrections. In particular, the width of the daughter molecular ion excitation spectrum rovibrational band should be known with a better then 1% precision. Very precise ab initio quantum calculations exist, and we compare them with the well known tritium molecule parameters within the framework of a phenomenological model. The rovibrational band width with accuracy of a few percent is interpreted as a result of the zero-point atomic oscillation in the harmonic potential. The Morse interatomic potential is used to investigate the impact of anharmonic atomic oscillations. The calculated corrections cannot account for the difference between the ab initio quantum calculations and the phenomenological model. Comment: 14 pages, 2 figures |
| Databáze: | OpenAIRE |
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