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Morales AI, Benlliure J, Kurtukián-Nieto T, et al. Half-life systematics across the N=126 shell closure: role of first-forbidden transitions in the β decay of heavy neutron-rich nuclei. Phys Rev Lett. 2014;113(2):022702doi: 10.1103/PhysRevLett.113.022702.
Morales, A. I., Benlliure, J., Kurtukián-Nieto, T., Schmidt, K. H., Verma, S., Regan, P. H., Podolyák, Z., Górska, M., Pietri, S., Kumar, R., Casarejos, E., Al-Dahan, N., Algora, A., Alkhomashi, N., Álvarez-Pol, H., Benzoni, G., Blazhev, A., Boutachkov, P., Bruce, A. M., Cáceres, L. S., Cullen, I. J., Denis Bacelar, A. M., Doornenbal, P., Estévez-Aguado, M. E., Farrelly, G., Fujita, Y., Garnsworthy, A. B., Gelletly, W., Gerl, J., Grebosz, J., Hoischen, R., Kojouharov, I., Kurz, N., Lalkovski, S., Liu, Z., Mihai, C., Molina, F., Mücher, D., Rubio, B., Shaffner, H., Steer, S. J., Tamii, A., Tashenov, S., Valiente-Dobón, J. J., Walker, P. M., Wollersheim, H. J., & Woods, P. J. (2014). Half-life systematics across the N=126 shell closure: role of first-forbidden transitions in the β decay of heavy neutron-rich nuclei. Physical review letters, 113(2), 022702. https://doi.org/10.1103/PhysRevLett.113.022702
Morales, A I, et al. "Half-life systematics across the N=126 shell closure: role of first-forbidden transitions in the β decay of heavy neutron-rich nuclei." Physical review letters vol. 113,2 (2014): 022702. doi: https://doi.org/10.1103/PhysRevLett.113.022702
Morales AI, Benlliure J, Kurtukián-Nieto T, Schmidt KH, Verma S, Regan PH, Podolyák Z, Górska M, Pietri S, Kumar R, Casarejos E, Al-Dahan N, Algora A, Alkhomashi N, Álvarez-Pol H, Benzoni G, Blazhev A, Boutachkov P, Bruce AM, Cáceres LS, Cullen IJ, Denis Bacelar AM, Doornenbal P, Estévez-Aguado ME, Farrelly G, Fujita Y, Garnsworthy AB, Gelletly W, Gerl J, Grebosz J, Hoischen R, Kojouharov I, Kurz N, Lalkovski S, Liu Z, Mihai C, Molina F, Mücher D, Rubio B, Shaffner H, Steer SJ, Tamii A, Tashenov S, Valiente-Dobón JJ, Walker PM, Wollersheim HJ, Woods PJ. Half-life systematics across the N=126 shell closure: role of first-forbidden transitions in the β decay of heavy neutron-rich nuclei. Phys Rev Lett. 2014 Jul 11;113(2):022702. doi: 10.1103/PhysRevLett.113.022702. Epub 2014 Jul 11. PMID: 25062171.
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Phys Rev Lett. 2014 Jul 11;113(2):022702. doi: 10.1103/PhysRevLett.113.022702. Epub 2014 Jul 11.

Half-life systematics across the N=126 shell closure: role of first-forbidden transitions in the β decay of heavy neutron-rich nuclei.

Physical review letters

A I Morales, J Benlliure, T Kurtukián-Nieto, K-H Schmidt, S Verma, P H Regan, Z Podolyák, M Górska, S Pietri, R Kumar, E Casarejos, N Al-Dahan, A Algora, N Alkhomashi, H Álvarez-Pol, G Benzoni, A Blazhev, P Boutachkov, A M Bruce, L S Cáceres, I J Cullen, A M Denis Bacelar, P Doornenbal, M E Estévez-Aguado, G Farrelly, Y Fujita, A B Garnsworthy, W Gelletly, J Gerl, J Grebosz, R Hoischen, I Kojouharov, N Kurz, S Lalkovski, Z Liu, C Mihai, F Molina, D Mücher, B Rubio, H Shaffner, S J Steer, A Tamii, S Tashenov, J J Valiente-Dobón, P M Walker, H J Wollersheim, P J Woods

Affiliations

  1. Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
  2. GSI, Planckstrasse 1, D-64291 Darmstadt, Germany.
  3. Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom and National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom.
  4. Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
  5. GSI, Planckstrasse 1, D-64291 Darmstadt, Germany and IFAC, New Delhi, India.
  6. IFIC, CSIC-Universidad de Valencia, E-46071 Valencia, Spain and Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen H-4001, Hungary.
  7. INFN, Università degli Studi di Milano, I-20133 Milano, Italy.
  8. IKP, University of Cologne, D-50937 Cologne, Germany.
  9. School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
  10. Department of Physics, Osaka University, 560-0043 Osaka, Japan.
  11. The Henryk Niewodniczànski Institute of Nuclear Physics, PL-31-342 Kraków, Poland.
  12. Department of Physics, Lund University, S-22100 Lund, Sweden.
  13. School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
  14. Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), RO-077125 Bucharest-Magurele, Romania.
  15. IFIC, CSIC-Universidad de Valencia, E-46071 Valencia, Spain.
  16. Research Center for Nuclear Physics (RCNP), Osaka University, 567-0047 Osaka, Japan.
  17. INFN-Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy.

PMID: 25062171 DOI: 10.1103/PhysRevLett.113.022702

Abstract

This Letter reports on a systematic study of β-decay half-lives of neutron-rich nuclei around doubly magic (208)Pb. The lifetimes of the 126-neutron shell isotone (204)Pt and the neighboring (200-202)Ir, (203)Pt, (204)Au are presented together with other 19 half-lives measured during the "stopped beam" campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden β strength reveal significant deviations for most of the nuclei with N<126. In contrast, theories including a fully microscopic treatment of allowed and first-forbidden transitions reproduce more satisfactorily the trend in the measured half-lives for the nuclei in this region, where the r-process pathway passes through during β decay back to stability.

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