| Article | |
| Report number | arXiv:1701.03845 |
| Title | $\beta$-decay half-lives and $\beta$-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb and Bi, beyond $N=126$ |
| Related title | $\beta$-decay half-lives and $\beta$-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb and Bi, beyond N=126 |
| Author(s) | Caballero-Folch, R. (Barcelona, Polytechnic U. ; TRIUMF) ; Domingo-Pardo, C. (Valencia U., IFIC) ; Agramunt, J. (Valencia U., IFIC) ; Algora, A. (Valencia U., IFIC ; Debrecen, Inst. Nucl. Res.) ; Ameil, F. (Darmstadt, GSI) ; Ayyad, Y. (U. Santiago de Compostela (main)) ; Benlliure, J. (U. Santiago de Compostela (main)) ; Bowry, M. (Surrey U.) ; Calviño, F. (Barcelona, Polytechnic U.) ; Cano-Ott, D. (Madrid, CIEMAT) ; Cortès, G. (Barcelona, Polytechnic U.) ; Davinson, T. (Edinburgh U.) ; Dillmann, I. (TRIUMF ; Darmstadt, GSI ; U. Giessen (main)) ; Estrade, A. (Darmstadt, GSI ; St. Mary's U., Halifax) ; Evdokimov, A. (Darmstadt, GSI ; U. Giessen (main)) ; Faestermann, T. (Munich, Tech. U.) ; Farinon, F. (Darmstadt, GSI) ; Galaviz, D. (Lisbon U., CFNUL) ; García, A.R. (Madrid, CIEMAT) ; Geissel, H. (Darmstadt, GSI ; U. Giessen (main)) ; Gelletly, W. (Surrey U.) ; Gernhäuser, R. (Munich, Tech. U.) ; Gómez-Hornillos, M.B. (Barcelona, Polytechnic U.) ; Guerrero, C. (CERN ; Seville U.) ; Heil, M. (Darmstadt, GSI) ; Hinke, C. (Munich, Tech. U.) ; Knöbel, R. (Darmstadt, GSI) ; Kojouharov, I. (Darmstadt, GSI) ; Kurcewicz, J. (Darmstadt, GSI) ; Kurz, N. (Darmstadt, GSI) ; Litvinov, Yu. A. (Darmstadt, GSI) ; Maier, L. (Munich, Tech. U.) ; Marganiec, J. (Darmstadt, EMMI) ; Marta, M. (Darmstadt, GSI ; U. Giessen (main)) ; Martínez, T. (Madrid, CIEMAT) ; Montes, F. (Michigan State U., NSCL ; Michigan State U., JINA) ; Mukha, I. (Darmstadt, GSI) ; Napoli, D.R. (INFN, Legnaro) ; Nociforo, C. (Darmstadt, GSI) ; Paradela, C. (Santiago de Compostela U.) ; Pietri, S. (Darmstadt, GSI) ; Podolyák, Zs. (Surrey U.) ; Prochazka, A. (Darmstadt, GSI) ; Rice, S. (Surrey U.) ; Riego, A. (Barcelona, Polytechnic U.) ; Rubio, B. (Valencia U., IFIC) ; Schaffner, H. (Darmstadt, GSI) ; Scheidenberger, Ch. (Darmstadt, GSI ; U. Giessen (main)) ; Smith, K. (Darmstadt, GSI ; Michigan State U., NSCL ; Michigan State U., JINA ; U. Notre Dame (main) ; Tennessee U.) ; Sokol, E. (Dubna, JINR) ; Steiger, K. (Munich, Tech. U.) ; Sun, B. (Darmstadt, GSI) ; Taín, J.L. (Valencia U., IFIC) ; Takechi, M. (Darmstadt, GSI) ; Testov, D. (Dubna, JINR ; Orsay, IPN) ; Weick, H. (Darmstadt, GSI) ; Wilson, E. (Surrey U.) ; Winfield, J.S. (Darmstadt, GSI) ; Wood, R. (Surrey U.) ; Woods, P.J. (Edinburgh U.) ; Yeremin, A. (Dubna, JINR) |
| Publication | 2017-06-23 |
| Imprint | 2017-01-13 |
| Number of pages | 16 |
| Note | 17 pages, 21 figures, will be submitted at PRC |
| In: | Phys. Rev. C 95 (2017) 064322 |
| DOI | 10.1103/PhysRevC.95.064322 |
| Subject category | nucl-ex ; Nuclear Physics - Experiment |
| Abstract | $Background:$ Previous measurements of $\beta$-delayed neutron emitters comprise around 230 nuclei, spanning from the $^{8}$He up to $^{150}$La. Apart from $^{210}$Tl, with a minuscule branching ratio of 0.007\%, no other neutron emitter is measured yet beyond $A=150$. Therefore new data are needed, particularly in the heavy mass region around N=126, in order to guide theoretical models and to understand the formation of the third r-process peak at $A\sim195$. $Purpose:$ To measure both, $\beta$-decay half-lives and neutron branching ratios of several neutron-rich Au, Hg, Tl, Pb and Bi isotopes beyond $N=126$. $Method:$ Ions of interest are produced by fragmentation of a $^{238}$U beam, selected and identified via the GSI-FRS fragment separator. A stack of segmented silicon detectors (SIMBA) is used to measure ion-implants and $\beta$-decays. An array of 30 $^3$He tubes embedded in a polyethylene matrix (BELEN) is used to detect neutrons with high efficiency and selectivity. A self-triggered digital system is employed to acquire data and to enable time-correlations. The latter are analyzed with an analytical model and results for the half-lives and neutron-branching ratios are derived using the binned Maximum-Likelihood method. $Results:$ Twenty new $\beta$-decay half-lives are reported for $^{204-206}$Au, $^{208-211}$Hg,$^{211-216}$Tl,$^{215-218}$Pb and $^{218-220}$Bi, nine of them for the first time. Neutron emission probabilities are reported for $^{210,211}$Hg and $^{211-216}$Tl. $Conclusions:$ The new $\beta$-decay half-lives are in good agreement with previous measurements in this region. The measured neutron emission probabilities are comparable or smaller than values predicted by global models like RHB+RQRPA. |
| Copyright/License | arXiv nonexclusive-distrib. 1.0 Publication: © 2017-2024 authors |
Corresponding record in: Inspire
レコード 生成： 2017-06-29, 最終変更： 2024-07-04
