ADOPTED LEVELS for 258Lr
Author: Balraj Singh | Citation: Nucl. Data Sheets 144, 297 (2017) | Cutoff date: 25-Aug-2017
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-1560 keV SY | S(n)= 5960 keV SY | S(p)= 2750 keV SY | Q(α)= 8904 keV 19 | ||
| Reference: 2017WA10 |
| References: | |||
| A | 262Db α decay (33.8 S) | ||
| E(level) (keV) | XREF | T1/2(level) |
| 0 | A | 3.92 s 33 % ε = 2.6 18 % α = 97.4 18 |
| 0+X | A | |
| 153+X 35 ? | A | |
| 224+X 50 | A |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 3.92 s 33 % ε = 2.6 18 % α = 97.4 18 | Decay modes from 2014Ha04. Others: SF decay of the ε-decay daughter was not detected and an upper limit of 5% was given by 1971Es01. T1/2(SF)>20 s, measured by 1971Fl02, gives %SF<20. 1992Gr02 recorded one α-SF correlation, probably due to 262Db α followed by the ε decay of 258Lr to 258No, and 28 α-α correlations in their study of 262Db α decay, and suggested that the ε and SF decay branches of 258Lr account for less than a few percent. E(level): Decay modes from 2014Ha04. Others: SF decay of the ε-decay daughter was not detected and an upper limit of 5% was given by 1971Es01. T1/2(SF)>20 s, measured by 1971Fl02, gives %SF<20. 1992Gr02 recorded one α-SF correlation, probably due to 262Db α followed by the ε decay of 258Lr to 258No, and 28 α-α correlations in their study of 262Db α decay, and suggested that the ε and SF decay branches of 258Lr account for less than a few percent. | |
| 224+X | From the favored α (the hindrance factor of ≈3.4) transition to this level, the configuration of this level is expected to be the same as that of its parent, the ground state of 262Db g.s. E(level): From the favored α (the hindrance factor of ≈3.4) transition to this level, the configuration of this level is expected to be the same as that of its parent, the ground state of 262Db g.s. |
1971Es01: 258Lr produced and identified in 248Cm(15N,4n), and 249Cf(12C,p2n) reactions with measurement of excitation functions
Theoretical studies: consult the NSR database at www.nndc.bnl.gov for about 25 references dealing with theoretical calculations of half-lives for different decay modes, binding energies, fission characteristics, and other nuclear structure aspects.
Q-value: Estimated uncertainties (2017Wa10): 110 for Q(β-) and S(n), 100 for S(p)
Q-value: S(2n)=13110 130, S(2p)=7250 160 (syst,2017Wa10)