E A Yakushev et al 2002 J. Phys. G: Nucl. Part. Phys. 28 463 doi:10.1088/0954-3899/28/3/308
E A Yakushev1, V G Chumin1, V M Gorozhankin1, K Ya Gromov1, A Kovalík1,2, D V Filosofov1, Y V Norseev1 and L V Yurkova1
Show affiliationsThe low energy electron spectrum from the α-decay of 225Ac has been measured with 20 eV instrumental resolution using an electrostatic spectrometer and radioactive sources prepared by vacuum evaporation. The predicted 10.642(5) keV M1 + < 0.05% E2 nuclear transition in 221Fr have been revealed. Energies of 26.015(5), 36.660(5), 38.543(3) and 108.37(1) keV nuclear transitions in 221Fr have been essentially improved. Relative intensities of the measured conversion electron lines of these transitions have also been determined.
Issue 3 (March 2002)
Received 27 November 2001
Published 13 February 2002
E A Yakushev et al 2002 J. Phys. G: Nucl. Part. Phys. 28 463
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