Direct determination of the excitation energy of the quasistable isomer 180mTa
Nesterenko, D. A., Blaum, K., Delahaye, P., Eliseev, S., Eronen, T., Filianin, P., Ge, Z., Hukkanen, M., Kankainen, A., Novikov, Y. N., Popov, A. V., Raggio, A., Stryjczyk, M., & Virtanen, V. (2022). Direct determination of the excitation energy of the quasistable isomer 180mTa. Physical Review C, 106(2), Article 024310. https://doi.org/10.1103/PhysRevC.106.024310
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Physical Review CAuthors
Ge, Z. |
Date
2022Copyright
©2022 American Physical Society
180mTa is a naturally abundant quasistable nuclide and the longest-lived nuclear isomer known to date. It is of interest, among others, for the search for dark matter, for the development of a γ laser, and for astrophysics. So far, its excitation energy has not been measured directly but has been based on an evaluation of available nuclear reaction data. We have determined the excitation energy of this isomer with high accuracy using the Penning-trap mass spectrometer JYFLTRAP. The determined mass difference between the ground and isomeric states of 180Ta yields an excitation energy of 76.79(55) keV for 180mTa. This is the first direct measurement of the excitation energy and provides a better accuracy than that of the previous evaluation value, 75.3(14) keV.
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American Physical Society (APS)ISSN Search the Publication Forum
2469-9985Keywords
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https://converis.jyu.fi/converis/portal/detail/Publication/151668770
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Related funder(s)
Research Council of Finland; European CommissionFunding program(s)
Academy Research Fellow, AoF; ERC Consolidator Grant; Research costs of Academy Research Fellow, AoF; MSCA Innovative Training Networks (ITN)

The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
This work has been supported by the European Union's Horizon 2020 research and innovation programme under Grants No. 771036 (ERC CoG MAIDEN) and No. 861198-LISA-H2020-MSCA-ITN-2019 and by the Academy of Finland under Projects No. 295207 and No. 327629.License
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