ADOPTED LEVELS, GAMMAS for 257Rf
Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 114, 1041 (2013) | Cutoff date: 1-Mar-2012
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-4341 keV SY | S(n)= 6426 keV 21 | S(p)= 3168 keV 84 | Q(α)= 9083 keV 8 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 261Sg α decay | B | 208Pb(50Ti,nγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | M(γ) | Final Levels | |
| 0.0 | AB | (1/2+) | 4.4 s +6-5 % α = 79.3 14 % ε = 19.4 14 % SF = 1.3 3 | ||||
| 50 1 | A | [5/2+] | |||||
| ≈75 | B | (11/2-) | 4.1 s 4 % α = 88 2 % ε = 11 2 % SF ≤ 1.4 | ||||
| 148 1 | B | (13/2-) | 73 | 75 | (11/2-) | ||
| 157 1 | A | (3/2+) | 107.3 157 1 | [M1] | 50 0.0 | [5/2+] (1/2+) | |
| 234 1 | B | (15/2-) | 86 1 159 1 | 148 75 | (13/2-) (11/2-) | ||
| 334 1 | B | (17/2-) | 100 1 186 1 | 234 148 | (15/2-) (13/2-) | ||
| 446 1 | B | (19/2-) | 112 1 212 1 | 334 234 | (17/2-) (15/2-) | ||
| 572 1 | B | (21/2-) | 126 1 238 1 | 446 334 | (19/2-) (17/2-) | ||
| 711 1 | B | (23/2-) | 139 1 265 1 | 572 446 | (21/2-) (19/2-) | ||
| 1157 1 | B | (21/2,23/2) | 139.9 µs 77 | 446 1 585 1 | 711 572 | (23/2-) (21/2-) | |
E(level): From 208Pb(50Ti,nγ), unless otherwise noted (2010Be16,2009Qi04).
Jπ(level): Based on rotational-band structure, unless otherwise noted.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | M(γ) | Final Levels | ||
| Band 1 - ROTATIONAL band (11/2-[725]) | |||||||
| ≈75 | (11/2-) | 4.1 s 4 % α = 88 2 % ε = 11 2 % SF ≤ 1.4 | |||||
| 148 1 | (13/2-) | ||||||
| 234 1 | (15/2-) | ||||||
| 334 1 | (17/2-) | 100 1 186 1 | 234 148 | (15/2-) (13/2-) | |||
| 446 1 | (19/2-) | 112 1 212 1 | 334 234 | (17/2-) (15/2-) | |||
| 572 1 | (21/2-) | 126 1 238 1 | 446 334 | (19/2-) (17/2-) | |||
| 711 1 | (23/2-) | 139 1 265 1 | 572 446 | (21/2-) (19/2-) | |||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 75 | (11/2-) | 4.1 s 4 % α = 88 2 % ε = 11 2 % SF ≤ 1.4 | From 1997He29, 1999He11. E(level): From 1997He29, 1999He11. ROTATIONAL band (11/2-[725]). |
| 148 | (13/2-) | E(level): ROTATIONAL band (11/2-[725]). | |
| 157 | (3/2+) | Possible configuration=3/2+[622]. | |
| 234 | (15/2-) | E(level): ROTATIONAL band (11/2-[725]). | |
| 334 | (17/2-) | E(level): ROTATIONAL band (11/2-[725]). | |
| 446 | (19/2-) | E(level): ROTATIONAL band (11/2-[725]). | |
| 572 | (21/2-) | E(level): ROTATIONAL band (11/2-[725]). | |
| 711 | (23/2-) | E(level): ROTATIONAL band (11/2-[725]). |
Calculations, compilations:
Half-life: 2012Po01, 2011He12, 2010Si27, 2008Do12, 2008Ro06, 2007Zh41, 2006Xu04, 2005Xu03, 2005Zh24, 2004Xu02, 2001Re13
Q(α): 2011Ad15, 2009Do22, 2008Do12, 2008Ro06
208Pb(50Ti,n), measured σ: 2011Ca08, 2011Ca14, 2011Wa41, 2010Li32, 2010Wa39, 2008Za07, 2007Fe17, 2005Fe05, 2005Sm02, 2005Sw01, 2004Ad32, 2004Ch31, 2003Sw01, 2001De23, 2001Sm06, 2001Za10, 2000Ad15, 2000De09, 2000Sm01, 1999Ad05, 1999Ch42, 1999Sm02, 1998Ad06
Rf K| x ray energies: 2008Th05
Masses: 2004Mu27
Spontaneous fission half-life: 2004Ro01, 2003Zu02
Favored α decay: 1993Bu09, 1992Bu03
g.s. properties: 1997Mo25, 1995Mo29
Single-particle Nilsson levels: 2010Se10, 2005Pa73, 1994Cw02
1994Cw02 calculate the following single-particle level sequence: g.s., 1/2[620]; 0.09 MeV, 3/2[622]; 0.21 MeV, 11/2[725]; 0.28 MeV, 7/2[613]; 0.46 MeV, 9/2[734]; 0.69 MeV, 9/2[615]; 0.87 MeV, 7/2[624].
Assignment: 249Cf(12C,4n) excit, parent of 253No (1969Gh01,1973Be33). 208Pb(50Ti,n) E(50Ti)=4.75-4.85 MeV/nucleon, parent of 253No (1985He06).
The 4.4 s (1/2+) isomer is populated in the α decay of 0.18 s 261Sg; the 4.1 s (11/2-) isomer, however, is not populated in the decay of 0.18 s 261Sg (1997He29).
Q-value: Estimated ΔQ(β-)=203 (2012Wa38)