Isospin dependence of electromagnetic transition strengths among an isobaric triplet
Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift
Abstract
Electric quadrupole matrix elements, Mp, for the Jπ=2+→0+, ΔT=0, T=1 transitions across the A=46 isobaric multiplet 46Cr-46V-46Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of Mp with respect to Tz. Pairs of nuclei in the T=1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The Mp values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for 46Cr and 46Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in 46V and 46Ti. A constant value of Mp across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T=1 isospin triplets is presented.
Detaljer
Författare | |
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Enheter & grupper | |
Externa organisationer |
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Forskningsområden | Ämnesklassifikation (UKÄ) – OBLIGATORISK
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Originalspråk | engelska |
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Artikelnummer | 134835 |
Antal sidor | 6 |
Tidskrift | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volym | 797 |
Status | Published - 2019 okt 10 |
Publikationskategori | Forskning |
Peer review utförd | Ja |
Nedladdningar
Relaterad forskningsoutput
Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift
Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding
Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift
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