214 research outputs found

    Improved Value for the Energy Splitting of the Ground-State Doublet in the Nucleus 229Th

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    We have made an improved estimate of the 229mTh isomer energy. The new value 7.8(5) eV includes an estimate of spectral contamination due to the out-of-band E2 transition from the 42.43-keV 7/2+ member of the [633] ground state band to the 3/2+ [631] 229mTh bandhead. We estimate a 2% branching ratio for this unobserved transition in the 42.43-keV 7/2+ [633] deexcitation. The excitation of the 229mTh level is increased from the previously reported value of 7.6(5) eV to the new value of 7.8(5) eV when this branch is included in the analysis

    CMS physics technical design report : Addendum on high density QCD with heavy ions

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    Physics of the HL-LHC, and Perspectives at the HE-LHC

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