학술논문
The β-decay of 71Kr: Precise measurement of the half-life
Document Type
article
Author
Vitéz-Sveiczer A.; Algora A.; Kiss G.G.; Rubio B.; Morales A.I.; Sarriguren P.; de Angelis G.; Recchia F.; Nishimura S.; Agramunt J.; Guadilla V.; Montaner-Pizá A.; Orrigo S.E.A.; Horváth Á.; Napoli D.; Lenzi S.; Boso A.; Phong V.; Wu J.; Söderström P.-A.; Sumikama T.; Suzuki H.; Takeda H.; Ahn D.S.; Baba H.; Doornenbal P.; Fukuda N.; Inabe N.; Isobe T.; Kubo T.; Kubono S.; Sakurai H.; Shimizu Y.; Sidong C.; Blank B.; Ascher P.; Gerbaux M.; Goigoux T.; Giovinazzo J.; Grévy S.; Kurtukián Nieto T.; Magron C.; Gelletly W.; Dombrádi Zs.; Fujita Y.; Tanaka M.; Aguilera P.; Molina F.; Eberth J.; Diel F.; Lubos D.; Borcea C.; Ganioglu E.; Nishimura D.; Oikawa H.; Takei Y.; Yagi S.; Korten W.; de France G.; Davies P.; Liu J.; Lee J.; Lokotko T.; Kojouharov I.; Kurz N.; Shaffner H.; Petrovici A.
Source
EPJ Web of Conferences, Vol 290, p 02021 (2023)
Subject
Language
English
ISSN
2100-014X
Abstract
The very proton-rich 71Kr isotope was produced through the in-flight fragmentation of 78Kr on a beryllium target at RIKEN – Nishina Center in order to study its β-decay properties. A stack of double-sided silicon strip detectors, called WAS3ABi, was used as the decay station, where the detection of ion implants, β-decays and β-delayed protons took place. Beta-delayed γ-rays were measured using a system of 84 HPGe detectors, called EURICA, surrounding the decay station. The main goal of the present study was the precise measurement of the half-life of 71Kr, as in the literature there is an almost 10 σ difference between the most precise independent results. Implant–β time correlations, implant–proton time correlations and implant–β–γ time correlations were all used to derive the half-life value, followed by a thorough investigation of systematic uncertainties for each method. As these values were found to be consistent, the weighted average t1/2 = 94.40+19ms is reported as a new half-life value in this work. Furthermore a total of 26 previously unreported γ following the β-decay of 71Kr were also identified in the analysis.