Wednesday, March 27, 2013

1303.6398 (T. Bhattacharjee et al.)

Low lying spectroscopy of odd-odd $^{146}$Eu    [PDF]

T. Bhattacharjee, D. Banerjee, S. K. Das, T. Malik, S. Chanda, A. Chowdhury, P. Das, S. Bhattacharyya, R. Guin
The $\gamma$ spectroscopy for the low lying states of N=83 Eu isotope has been performed from EC decay of $^{146}$Gd($\tau_{\frac{1}{2}}$ = 48 days), produced by $^{144}$Sm($\alpha$, 2n) reaction with 32 MeV alpha beam from K = 130 cyclotron at Variable Energy Cyclotron Centre, Kolkata. The level structure has been significantly modified from the measurement of $\gamma$ singles, $\gamma-\gamma$ coincidence and decay half lives. Lifetime measurement has been performed for the 3$^-$, 114.06 keV and 2$^-$, 229.4 keV levels of $^{146}$Eu, by using Mirror Symmetric Centroid Difference (MSCD) method with LaBr$_3$ detectors. Mean lifetimes of 5.38 $\pm$ 1.8 ps and 8.38 $\pm$ 1.6 ps have been determined respectively for these two states. A shell model calculation has also been performed using OXBASH code.
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