ADOPTED LEVELS for 253Rf
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 12-Feb-2023
Authors: Ashok K. Jain, Sukhjeet Singh, Jagdish K. Tuli | Citation: Nucl. Data Sheets 107, 2103 (2006) | Cutoff date: 31-Jan-2006
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 7230 keV CA | S(p)= 2180 keV SY | Q(α)= 9430 keV SY | |||
| Reference: 2021WA16,2019MO01 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | (1/2+) | 9.9 ms 12 % α = 17 6 % SF = 83 6 |
| 0+X | (7/2+) | 52.8 µs 44 % α = ? % SF ≈ 100 |
| ≥1020+X | 0.66 ms +40-18 % α = ? % IT ≈ 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 1020+X | 0.66 ms +40-18 % α = ? % IT ≈ 100 | Level identified from observation of seven isomeric decays followed by the fast fission of 253Rf (2022Lo03). From evidence of decay by isomeric transitions only, ≈100% IT decay is assigned by inference, while there is no experimental information for the branching ratio. E(level): Level identified from observation of seven isomeric decays followed by the fast fission of 253Rf (2022Lo03). From evidence of decay by isomeric transitions only, ≈100% IT decay is assigned by inference, while there is no experimental information for the branching ratio. |
1976FlZN: review article on the production of superheavy elements at JINR-Dubna, including 253Rf (labeled as 253Ku in the paper), produced in 206Pb(50Ti,3n) reaction, with measured T1/2=1.8 s, and 50% SF decay branching. This activity is likely different as the measured half-life is in sharp disagreemet with 9.9 ms 12 in 2022Lo03.
1997He29: 253Rf produced in 204Pb(50Ti,n),E=4.68 MeV/nucleon at GSI facility. α total of 14 correlated events with T1/2=48 μs and eight correlated events with T1/2=11 ms were observed.
2021Kh07: 253Rf produced in 204Pb(50Ti,n),E=234.3 MeV, followed by separation of evaporation residues (ERs) using gas-filled TransActinide Separator and Chemistry Apparatus (TASCA) at UNILAC, GSI. Measured (Er)(fission)-correlated events, half-lives of the two fission activities of 253Rf.
2022Lo03: 253Rf produced in 204Pb(50Ti,n),E=244 MeV. Measured Eα, (recoil)αα-correlated decays, and T1/2 of the g.s. and two isomers in 253Rf using SHELS fragment separator and implanted into the GABRIELA setup at FLNR-JINR-Dubna.
Theoretical structure calculations:
2018Ma38: calculated single-particle energy spectra, Jπ, deformation of odd isotones with n=149, 153 using Two-Center Shell Model (TCSM) with K-mixing of the basis wave functions and inclusion of the Coriolis correction
2015As05: calculated energy levels, Jπ, Nilsson single-particle energies, deformation parameters.
2006Sh19: calculated levels, Jπ, rotational bands, transition dipole and quadrupole moments using cluster model
2005Pa73: calculated following single-particle level sequence: g.s., 9/2[734]; 0.01 MeV, 7/2[624]; 0.07 MeV, 5/2[622]; 0.33 MeV, 1/2[633]; 0.38 MeV, 1/2[501].
1994Cw02: calculated following single-particle level sequence: g.s., 7/2[624]; 0.02 MeV, 9/2[734]; 0.21 MeV, 5/2[622].
1985Cw01: calculated deformation energy along fission barrier versus β2, fission barrier versus neutron number using Strutinsky method
Q-value: S(p) and Q(α) from 2021Wa16. S(n) from theory (2019Mo01)
Q-value: Estimated uncertainties (2021Wa16): 450 for S(p), 300 for Q(α)
Q-value: Q(ε)=5120 440, Q(εp)=3480 410, S(2p)=3790 450 (syst, 2021Wa16). S(2n)=16110 (theory,2019Mo01)