NUSPIN 2017

The question of the degree of purity of the isospin quantum number is one of considerable importance and much current interest. Although the value of isospin is not a directly observable quantity, both the purity of isospin and the extent of the resulting symmetries can be examined by investigating the Tz-dependence of specific nuclear phenomena among a set of isobaric analogue states. In particular, in absence of isospin mixing, the quadrupole transition matrix elements are linear with Tz; any deviation from this linear trend can therefore give informations on the degree of isospin purity of the states under examination. In a experiment performed at GSI with the AGATA-FRS-LYCCA setup a combination of Coulex and plunger lifetime experiments was performed across the A=46 isobaric triplet, 46Cr-46V-46Ti in order to investigate the isospin mixing between the T=0 and T=1, Jπ=2+ states in 46V. The aim of this experiment was to study the B(E2) strengths for the Jπ:2+->0+ analogue transitions across this triplet in order to test the linearity of the √B(E2) against the third component of isospin, Tz, thus providing a test of isospin mixing. The status of the analysis and the results for both Coulex and lifetime experiments will be presented.