ADOPTED LEVELS for 255Rf
Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 114, 1041 (2013) | Cutoff date: 1-Nov-2011
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-5402 keV SY | S(n)= 6939 keV SY | S(p)= 2831 keV SY | Q(α)= 9055 keV 4 | ||
Reference: 2012WA38 |
References: | |||
A | 259Sg α decay | B | 208Pb(48Ti,n) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
0.0 | AB | (9/2-) | 1.68 s 9 % α = 42 9 % SF = 58 9 % ε < 1 |
≈63 | A | ||
≈121 | A | ||
≈656 | A |
E(level): From 259Sg α decay.
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | (9/2-) | 1.68 s 9 % α = 42 9 % SF = 58 9 % ε < 1 | %SF from T1/2(SF)=2.9 s 4 (weighted average of 2.7 s 5 (1985He06) and 3.1 s 4 (1997He29), recommended in 2000Ho27), and T1/2=1.68 s 9 (2006He27). E(level): %SF from T1/2(SF)=2.9 s 4 (weighted average of 2.7 s 5 (1985He06) and 3.1 s 4 (1997He29), recommended in 2000Ho27), and T1/2=1.68 s 9 (2006He27). |
1994Cw02 calculated the following single-particle level sequence: 0, 9/2[734]; 290, 7/2[624]; 400, 5/2[622]; 670, 1/2[620]; 790, 3/2[622]; 890, 11/2[725]; 920, 7/2[613]. See also 2005Pa73
Production and identification of 255Rf nuclide:
1975Og01, 1975Og04: 207Pb(50Ti,2n) excit, fission fragments detected
1985He06, 1986He28, 1989He03: 207Pb(50Ti,2n) E=192 MeV; total of 19 α particles detected by α-α correlation
1984Og02, 1984Og03: 208Pb(50Ti,2n)
1997He29: 208Pb(50Ti,3n), 206Pb(50Ti,n), E=4.9 to 5.1 MeV per α, measured excit, delayed α-α correlations.
2001He35: 207Pb(50Ti,2n). Measured α, αγ, αα. In the experiment with improved statistics, compared with their earlier experiments, the authors did not confirm any indication for existence of a low-lying isomer in 255Rf with T1/2≈0.9 s. Also 1999He07.
2006He27: 255Rf isotope produced by the 207Pb(50Ti,2n) at E=4.85 MeV/nucleon. Reaction products were separated from the primary beam by the SHIP velocity filter at GSI facility and implanted into a position-sensitive 16-strip PIPS detector.
α tentative α-decaying isomer with half-life=0.8 s +5-2 reported by 1997He29 has not been confirmed in authors’ later (higher statistics) works of 2001He25 and 2006He27
Q-value: Δ(Q(β-))=438, Δ(S(n))=306, Δ(S(p))=322 (syst,2012Wa38)
Q-value: Q(εp)=2317 115 (syst,2012Wa38)