The lifetime 146+13−16 fs of the excited state of 87Rb at 845 keV was measured by the Doppler-shift attenuation method (DSAM). It corresponds to a reduced transition strength of B(M1)⏐↓⏐=0.644+0.075−0.053 μ2N=0.36+0.04−0.03 W.u. for the M1 transition to the 32− ground state. Comparison to the value of B(M1)↑⏐=0.34(5) μ2N measured previously in (γ,γ′) [Käubler et al., Phys. Rev. C 65, 054315 (2002)] pins down the spin assignment Jπ=12− to the excited state at 845 keV. Together with its known angular momentum quantum number l=1, the 12−→32− transition can be identified as the proton 2p1/2→2p3/2 spin-flip transition.
Identification of the proton 2p1/2 → 2p3/2 M1 spin-flip transition in 87Rb
JOHN, PHILIPP RUDOLF;
2013
Abstract
The lifetime 146+13−16 fs of the excited state of 87Rb at 845 keV was measured by the Doppler-shift attenuation method (DSAM). It corresponds to a reduced transition strength of B(M1)⏐↓⏐=0.644+0.075−0.053 μ2N=0.36+0.04−0.03 W.u. for the M1 transition to the 32− ground state. Comparison to the value of B(M1)↑⏐=0.34(5) μ2N measured previously in (γ,γ′) [Käubler et al., Phys. Rev. C 65, 054315 (2002)] pins down the spin assignment Jπ=12− to the excited state at 845 keV. Together with its known angular momentum quantum number l=1, the 12−→32− transition can be identified as the proton 2p1/2→2p3/2 spin-flip transition.File in questo prodotto:
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