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 Ros, Jorge; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere

doi:10.1103/PhysRevC.95.064322

dc.contributor.author	Caballero-Folch, R.
dc.contributor.author	Domingo-Pardo, C
dc.contributor.author	Agramunt Ros, Jorge
dc.contributor.author	Calviño Tavares, Francisco
dc.contributor.author	Cortés Rossell, Guillem Pere
dc.contributor.other	Universitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned	2017-06-30T07:38:14Z
dc.date.available	2017-06-30T07:38:14Z
dc.date.issued	2017-06-23
dc.identifier.citation	Caballero-Folch, R., Domingo-Pardo, C., Agramunt, J., Calviño, F., Cortes, G. 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", 23 Juny 2017, vol. 95, núm. 6, p. 064322-1-064322-16.
dc.identifier.issn	0556-2813
dc.identifier.uri	http://hdl.handle.net/2117/106018
dc.description.abstract	Background: There have been measurements on roughly 230 nuclei that are beta-delayed neutron emitters. They range from 8He up to 150La. Apart from 210Tl, with a branching ratio of only 0.007%, no other neutron emitter has been measured beyond A = 150. Therefore, new data are needed, particularly in the region of heavy nuclei around N = 126, in order to guide theoretical models and help understand the formation of the third r-process peak at A ~ 195. Purpose: To measure both ß-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 were produced by fragmentation of a 238U beam, selected and identified via the GSI-FRS fragment separator. A stack of segmented silicon detectors (SIMBA) was used to measure ion implants and Beta decays. An array of 30 3He tubes embedded in a polyethylene matrix (BELEN) was 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 were analyzed with an analytical model and results for the half-lives and neutron-branching ratios were derived by using the binned maximum-likelihood method. Results: Twenty new beta-decay half-lives are reported for 204-206Au, 208–211Hg,211–216Tl,215–218Pb, and 218–220Bi, nine of them for the first time. Neutron emission probabilities are reported for 210,211Hg and 211–216Tl.
dc.language.iso	eng
dc.rights	Attribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject	Àrees temàtiques de la UPC::Física
dc.subject	Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
dc.subject	Àrees temàtiques de la UPC::Energies::Energia nuclear
dc.subject.lcsh	Neutrons
dc.subject.lcsh	Astrophysics
dc.subject.other	Beta decay
dc.subject.other	Delayed neutrons
dc.subject.other	Astrophysics
dc.subject.other	Exotic nuclei
dc.title	Beta-decay half-lives and beta-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb, and Bi, beyond N = 126
dc.type	Article
dc.subject.lemac	Neutrons
dc.subject.lemac	Astrofísica
dc.contributor.group	Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
dc.identifier.doi	10.1103/PhysRevC.95.064322
dc.relation.publisherversion	https://journals.aps.org/prc/abstract/10.1103/PhysRevC.95.064322
dc.rights.access	Open Access
drac.iddocument	21120559
dc.description.version	Postprint (published version)
dc.relation.projectid	info:eu-repo/grantAgreement/MICINN/6PN/FPA2011-28770-C03-03
upcommons.citation.author	Caballero-Folch, R., Domingo-Pardo, C., Agramunt, J., Calviño, F., Cortes, G.
upcommons.citation.published	true
upcommons.citation.publicationName	Physical review C
upcommons.citation.volume	95
upcommons.citation.number	6
upcommons.citation.startingPage	064322-1
upcommons.citation.endingPage	064322-16