A1 Journal article (refereed)
Search for Electron-Capture Delayed Fission in the New Isotope 244Md (2020)

Khuyagbaatar, J., Albers, H. M., Block, M., Brand, H., Cantemir, R. A., Di Nitto, A., Düllmann, Ch. E., Götz, M., Götz, S., Heßberger, F. P., Jäger, E., Kindler, B., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Lens, L., Mistry, A., Schausten, B., . . . Yakushev, A. (2020). Search for Electron-Capture Delayed Fission in the New Isotope 244Md. Physical Review Letters, 125(14), Article 142504. https://doi.org/10.1103/physrevlett.125.142504

JYU authors or editors

Publication details

All authors or editors: Khuyagbaatar, J.; Albers, H. M.; Block, M.; Brand, H.; Cantemir, R. A.; Di Nitto, A.; Düllmann, Ch. E.; Götz, M.; Götz, S.; Heßberger, F. P.; et al.

Journal or series: Physical Review Letters

ISSN: 0031-9007

eISSN: 1079-7114

Publication year: 2020

Publication date: 01/10/2020

Volume: 125

Issue number: 14

Article number: 142504

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/physrevlett.125.142504

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/72028

Abstract

The electron-capture decay followed by a prompt fission process was searched for in the hitherto unknown most neutron-deficient Md isotope with mass number 244. Alpha decay with α-particle energies of 8.73–8.86 MeV and with a half-life of 0.30+0.19−0.09  s was assigned to 244Md. No fission event with a similar half-life potentially originating from spontaneous fissioning of the short-lived electron-capture decay daughter 244Fm was observed, which results in an upper limit of 0.14 for the electron-capture branching of 244Md. Two groups of fission events with half-lives of 0.9+0.6−0.3  ms and 5+3−2  ms were observed. The 0.9+0.6−0.3  ms activity was assigned to originate from the decay of 245Md. The origin of eight fission events resulting in a half-life of 5+3−2  ms could not be unambiguously identified within the present data while the possible explanation has to invoke previously unseen physics cases.

Keywords: nuclear physics; isotopes; nuclear fission

Free keywords: nuclear reactions; nuclear structure and decays

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2020

JUFO rating: 3