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Beta-decay half-lives and Beta-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb and Bi, beyond N=126

Caballero-Folch, R, Domingo-Pardo, C, Agramunt, J, Algora, A, Ameil, F, Ayyad, Y, Benlliure, J, Bowry, M, Calvino, F, Cano-Ott, D , Cortes, G, Davinson, T, Dillmann, I, Estrade, A, Evdokimov, A, Faestermann, T, Farinon, F, Galaviz, D, Garcia, AR, Geissel, H, Gelletly, William, Gernhauser, R, Gomez-Hornillos, MB, Guerrero, C, Heil, M, Hinke, C, Knobel, R, Kojouharov, I, Kurcewicz, J, Kurz, N, Litvinov, Yu A, Maier, L, Marganiec, J, Marta, M, Martinez, T, Montes, F, Mukha, I, Napoli, DR, Nociforo, C, Paradela, C, Pietri, S, Podolyak, Zsolt, Prochazka, A, Rice, S, Riego, A, Rubio, B, Schaffner, H, Scheidenberger, Ch, Smith, K, Sokol, E, Steiger, K, Sun, B, Tain, JL, Takechi, M, Testov, D, Weick, H, Wilson, E, Winfield, JS, Wood, Rachael, Woods, PJ and Yeremin, A (2017) Beta-decay half-lives and Beta-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb and Bi, beyond N=126 PHYSICAL REVIEW C, 95 (6), 064322.

S410-GSI-Exp-PRC-RCaballero-Folch-20161116.pdf - Accepted version Manuscript

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Background: Previous measurements of Beta-delayed neutron emitters comprise around 230 nuclei, spanning from the 8He up to 150La. Apart from 210Tl, with a minuscule branching ratio of 0.07%, 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 195. 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 238U beam, selected and identifed via the GSI-FRS fragment separator. A stack of segmented silicon detectors (SIMBA) is used to measure ion-implants and -decays. An array of 30 3He 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

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Caballero-Folch, R
Domingo-Pardo, C
Agramunt, J
Algora, A
Ameil, F
Ayyad, Y
Benlliure, J
Bowry, M
Calvino, F
Cano-Ott, D
Cortes, G
Davinson, T
Dillmann, I
Estrade, A
Evdokimov, A
Faestermann, T
Farinon, F
Galaviz, D
Garcia, AR
Geissel, H
Gernhauser, R
Gomez-Hornillos, MB
Guerrero, C
Heil, M
Hinke, C
Knobel, R
Kojouharov, I
Kurcewicz, J
Kurz, N
Litvinov, Yu A
Maier, L
Marganiec, J
Marta, M
Martinez, T
Montes, F
Mukha, I
Napoli, DR
Nociforo, C
Paradela, C
Pietri, S
Prochazka, A
Rice, S
Riego, A
Rubio, B
Schaffner, H
Scheidenberger, Ch
Smith, K
Sokol, E
Steiger, K
Sun, B
Tain, JL
Takechi, M
Testov, D
Weick, H
Wilson, E
Winfield, JS
Woods, PJ
Yeremin, A
Date : 23 June 2017
Funders : STFC
DOI : 10.1103/PhysRevC.95.064322
Copyright Disclaimer : Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Depositing User : Melanie Hughes
Date Deposited : 23 May 2017 14:47
Last Modified : 11 Dec 2018 11:23

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