A1 Journal article (refereed)
Direct determination of the excitation energy of the quasistable isomer 180mTa (2022)

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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Publication details

All authors or editorsNesterenko, D. A.; Blaum, K.; Delahaye, P.; Eliseev, S.; Eronen, T.; Filianin, P.; Ge, Z.; Hukkanen, M.; Kankainen, A.; Novikov, Yu. N.; et al.

Journal or seriesPhysical Review C



Publication year2022

Publication date08/08/2022


Issue number2

Article number024310

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish


Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/82591

Web address of parallel published publication (pre-print)https://arxiv.org/abs/2205.10534


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.

Keywordsnuclear physicstantalum

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Ministry reportingYes

Reporting Year2022

JUFO rating2

Last updated on 2024-03-04 at 19:17