Author: C. Morse |  Citation: Nucl. Data Sheets 189, 111 (2023) |  Cutoff date: 23-Sep-2022 

 Full ENSDF file | Adopted Levels (PDF version) 

S(p)= 1025 keV SYQ(α)= 9469 keV SY
Reference: 2021Wa16

General Comments:

$ 2022Hu21: First observation of the nucleus 251Lr. The experiment was performed using AGFA at Argonne National Laboratory using the 203Tl(50Ti,2n) reaction at a beam energy of 237 MeV. 251Lr was identified based on spatial and temporal correlations between evaporation residues detected at the focal plane of AGFA and subsequent α-decays linking 251Lr with known decays of the daughter nuclei.

Q-value: ΔS(p)=283, ΔQ(α)=288 (2021Wa16)

Q-value: S(2p)=3929 syst 259, Q(εp)=2142 syst 220 (2021Wa16)

Jπ(level) T1/2(level)
    0 (7/2-) 24.4 ms +70-45 
% α ≈ 100
  117 27  (1/2-) 42 ms +42-14 
% α ≈ 100

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Additional Level Data and Comments:


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