by Hukkanen, M., Kankainen, A., Trzaska, W. H., Strömberg, D. F., Martínez-Pinedo, G., Andersen, K., Bodewits, E., Brown, B. A., Canete, L., Cederkäll, J., Enqvist, T., Eronen, T., Fynbo, H. O. U., Geldhof, S., de Groote, R., Jenkins, D. G., Jokinen, A., Joshi, P., Khanam, A., Kostensalo, J., Kuusiniemi, P., Langanke, K., Moore, I., Munch, M., Nesterenko, D. A., Ovejas, J. D., Penttilä, H., Pohjalainen, I., Reponen, M., Rinta-Antila, S., Riisager, K., de Roubin, A., Schotanus, P., Srivastava, P. C., Suhonen, J., Swartz, J. A., Tengblad, O., Vilen, M., Vínals, S., Äystö, J. and Kirsebom, O. S.
Abstract:
We report the first detection of the second-forbidden, nonunique, 2+→0+, ground-state transition in the β decay of 20F. A low-energy, mass-separated 20F+ beam produced at the IGISOL facility in Jyväskylä, Finland, was implanted in a thin carbon foil and the β spectrum measured using a magnetic transporter and a plastic-scintillator detector. The β-decay branching ratio inferred from the measurement is bβ=[0.41±0.08(stat)±0.07(sys)]×10−5 corresponding to logft=10.89(11), making this one of the strongest second-forbidden, nonunique β transitions ever measured. The experimental result is supported by shell-model calculations and has significant implications for the final evolution of stars that develop degenerate oxygen-neon cores. Using the new experimental data, we argue that the astrophysical electron-capture rate on 20Ne is now known to within better than 25% at the relevant temperatures and densities.
Reference:
Measurement of the 2+ →0+ ground-state transition in the β decay of 20F (Hukkanen, M., Kankainen, A., Trzaska, W. H., Strömberg, D. F., Martínez-Pinedo, G., Andersen, K., Bodewits, E., Brown, B. A., Canete, L., Cederkäll, J., Enqvist, T., Eronen, T., Fynbo, H. O. U., Geldhof, S., de Groote, R., Jenkins, D. G., Jokinen, A., Joshi, P., Khanam, A., Kostensalo, J., Kuusiniemi, P., Langanke, K., Moore, I., Munch, M., Nesterenko, D. A., Ovejas, J. D., Penttilä, H., Pohjalainen, I., Reponen, M., Rinta-Antila, S., Riisager, K., de Roubin, A., Schotanus, P., Srivastava, P. C., Suhonen, J., Swartz, J. A., Tengblad, O., Vilen, M., Vínals, S., Äystö, J. and Kirsebom, O. S.), In Physical Review C, volume 100, 2019.
Bibtex Entry:
@article{hukkanen_measurement_2019,
title = {Measurement of the 2+ →0+ ground-state transition in the β decay of {20F}},
volume = {100},
url = {https://link.aps.org/doi/10.1103/PhysRevC.100.065805},
doi = {10.1103/PhysRevC.100.065805},
abstract = {We report the first detection of the second-forbidden, nonunique, 2+→0+, ground-state transition in the β decay of 20F. A low-energy, mass-separated 20F+ beam produced at the IGISOL facility in Jyväskylä, Finland, was implanted in a thin carbon foil and the β spectrum measured using a magnetic transporter and a plastic-scintillator detector. The β-decay branching ratio inferred from the measurement is bβ=[0.41±0.08(stat)±0.07(sys)]×10−5 corresponding to logft=10.89(11), making this one of the strongest second-forbidden, nonunique β transitions ever measured. The experimental result is supported by shell-model calculations and has significant implications for the final evolution of stars that develop degenerate oxygen-neon cores. Using the new experimental data, we argue that the astrophysical electron-capture rate on 20Ne is now known to within better than 25% at the relevant temperatures and densities.},
number = {6},
urldate = {2021-06-09},
journal = {Physical Review C},
author = {Hukkanen, M. and Kankainen, A. and Trzaska, W. H. and Strömberg, D. F. and Martínez-Pinedo, G. and Andersen, K. and Bodewits, E. and Brown, B. A. and Canete, L. and Cederkäll, J. and Enqvist, T. and Eronen, T. and Fynbo, H. O. U. and Geldhof, S. and de Groote, R. and Jenkins, D. G. and Jokinen, A. and Joshi, P. and Khanam, A. and Kostensalo, J. and Kuusiniemi, P. and Langanke, K. and Moore, I. and Munch, M. and Nesterenko, D. A. and Ovejas, J. D. and Penttilä, H. and Pohjalainen, I. and Reponen, M. and Rinta-Antila, S. and Riisager, K. and de Roubin, A. and Schotanus, P. and Srivastava, P. C. and Suhonen, J. and Swartz, J. A. and Tengblad, O. and Vilen, M. and Vínals, S. and Äystö, J. and Kirsebom, O. S.},
month = dec,
year = {2019},
note = {No CMAM},
pages = {065805},
file = {APS Snapshot:E:\Usuarios\Administrator\Zotero\storage\6QLPQVGE\PhysRevC.100.html:text/html;Full Text PDF:E:\Usuarios\Administrator\Zotero\storage\ESVW64WP\Hukkanen et al. - 2019 - Measurement of the $ 2 ^ + ensuremath rightarrow.pdf:application/pdf},
}