ADOPTED LEVELS for 274Bh

Author: Balraj Singh |  Citation: Nucl. Data Sheets 156, 70 (2019) |  Cutoff date: 31-Jan-2019 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=200 keV SYS(n)= 5020 keV SYS(p)= 3630 keV SYQ(α)= 8950 keV 50
Reference: 2017WA10

References:
  A  278Mt α decay (4.5 S) 

General Comments:

2010Og01, 2011Og04: 274Bh from α decay chain: 294Ts |) 290Mc |) 286Nh |) 282Rg |) 278Mt |) 274Bh. 294Ts formed and identified in reaction 249Bk(48Ca,3n), E=247 MeV at FLNR-JINR-Dubna using Dubna gas-filled recoil separator (DGFRS). Measured Eα, half-lives, α-α correlations. One decay chain was assigned to the decay of 294Ts. See details in 294Ts Adopted Levels.

2012Og06, 2013Og04, 2013Og01: 274Bh formed in the decay chain of 294Ts as above in 2011Og04. See details in 294Ts Adopted Levels. Three decay chains were reported.

2014Kh04: 274Bh from α decay chain: 294Ts |) 290Mc |) 286Nh |) 282Rg |) 278Mt |) 274Bh; 294Ts formed and identified in reaction 249Bk(48Ca,3n),E=252.1, 254.0, 258.0 MeV at GSI using Gas-filled Trans-Actinide Separator and Chemistry Apparatus (TASCA). Four decay chains were assigned to the decay of 294Ts, but only two reported in the paper. See details for 294Ts Adopted Levels

One EVR-α-SF correlated decay chain reported by 2011Og04, three by 2013Og04 and 2012Og06, and two by 2014Kh04, all starting with the decay of 294Ts and ending in SF-decaying 270Db nuclide in Dubna work (2013Og04, 2011Og04) and in SF-decaying 266Lr in GSI work (2014Kh04). 2011Og07 and 2012OgZZ are also related reports for the Dubna work. See Adopted Levels for 294Ts for details of above three studies.

For theoretical studies, consult Nuclear Science References (NSR) database at NNDC, BNL for 44 primary references dealing with the half-lives and other aspects of nuclear structure in this mass region

Q-value: Estimated uncertainties (2017Wa10): ΔQ(β-)=860, ΔS(n)=930, ΔS(p)=800.

Q-value: S(2n)=11250 820 (syst, 2017Wa10). S(2p)=9180 (theory, 1997Mo25)





E(level)
(keV)
XREF T1/2(level)
  0A 44 s +34-13 
% SF = ?
% α ≈ 100

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0 44 s +34-13 
% SF = ?
% α ≈ 100
Only the α decay mode observed.
E(level): Only the α decay mode observed.

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