Author: T. Tamura |  Citation: Nucl. Data Sheets 108, 455 (2007) |  Cutoff date: 30-Sep-2006 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=9.51×103 keV 4S(n)= 4.77×103 keV 4S(p)= 1.221×104 keV 4Q(α)= -8.64×103 keV 5
Reference: 2012WA38

General Comments:

1971Fo22: 235U(n,f), on-line ms; T1/2=1.5 s 5, γ spectra

1978Sh03: 235U(n,f), on-line ms; 122Ag; semi γ, semi-semi γγ-coin; deduced T1/2 and established the decay scheme

1983Re05:235U(n,f) on-line ms; measured T1/2, β-delayed neutron spectra, deduced Pn

1995Fe12: U(p,f) E(p)=1 GeV, ISOLDE, on-line mass separation by laser ion source, from neutron counting, observed β-delayed neutron emitter

2000Kr18: U(p,f) E(p)=1 GeV, ISOLDE; measured γ spectra as a function of laser frequency, observing hyperfine splitted spectra associated with a low-spin and a high-spin isomers using isomer-specific laser ionization technic. Identified isomeric states J=(1-) and J=(9-), both β--delayed neutron and γ decay

2006Mo07: Activity was produced by fragmentation of 136Xe+50,51 (E=121.8 MeV/nucleon) on Be. Particle identification was performed. The products were passed to a mass spectrometer, position sensitive detector, stacked Si detectors and tof arrangement. β-delayed neutrons were detected within the neutron emission ratio observer; Implantation and decay events were time stamped and correlated. Deduced T1/2 and Pn

The order of 0.529S level (J=(3+)) and 0.55S level (J=(1-)) is not well-established.

Q-value: Note: Current evaluation has used the following Q record

Q-value: ΔQβ-=210 keV, ΔS(n)=250 keV, ΔS(p)=540 keV, ΔQ(α)=540 keV from atomic mass systematics (2003Au03)

Jπ(level) T1/2(level)
   0.0 (3+) 0.529 s 13 
% β- = 99.8
% β-n = 0.186 10
   0.0+X (1-) 0.55 s 5 
% β- = ?
% IT = ?
% β-n = ?
  80 50  (9-) 0.20 s 5 
% β- = ?
% β-n = ?

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Additional Level Data and Comments:

   0.0(3+) 0.529 s 13 
% β- = 99.8
% β-n = 0.186 10
-n from neutron counting (1983Re05). other: %β-n|<1.3 from βn coincidence (2006Mo07).

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