157CE    COMMENTS                                                ENSDF    201711
157CE  H TYP=FUL$AUT=FILIP G KONDEV$CIT=ENSDF$CUT=20-Feb-2017$                  
157CE c  COMM$Nuclear data sheets for 157Ce                                     
157CE c  AUTH$FILIP G KONDEV                                                    
157CE c  INST$Nuclear Engineering Division                                      
157CE#c       Argonne National Laboratory                                       
157CE#c       9700 South Cass Avenue                                            
157CE#c       Argonne, Illinois 60439, USA                                      
157CE c  ABST$Information about the nuclear structure properties of the         
157CE2c  {+157}Ce nuclide is presented                                          
157CE c  CUT$Literature available up to February 20, 2017 has been consulted.   
157CE c  FUND$This work is supported by the Office of Nuclear Physics, Office   
157CExc  of Science, U.S. Department of Energy under contract                   
157CExc  DE-AC02-06CH11357.                                                     
157CE c  ENSDF                                                                  
                                                                                
157CE    ADOPTED LEVELS                                          ENSDF    201711
157CE  H TYP=FUL$AUT=F.G. KONDEV$CIT=ENSDF$CUT=20-Feb-2017$                     
157CE  Q 8610      SY3192    SY14169   SY-5885   SY    2017WA10                 
157CE cQ $|DQ(|b{+-})=500, |DS(n)=500, |DS(p)=565, |DQ(|a)=565                  
157CE cQ $S(2n)=8293 syst {I500}, Q(|b{+-}n)=3566 syst {I447}                   
157CE DQ $The current evaluation has used the following Q-record:               
157CE DQ $8532      SY 3209   SY           -5508  SY    2012Wa38                
157CE DQ $Estimated uncertainties (2012Wa38): |DQ(|b{+-})=643, |DS(n)=643,      
157CE2DQ |DQ(|a)=643                                                            
157CE DQ $S(2n)=8225 {I643}, Q(|b{+-}n)=3489 {I585}                             
157CE2DQ (2012Wa38, syst)                                                       
157CE c  2017Wu04: The {+157}Ce nuclide was produced at the RIBF-RIKEN facility 
157CE2c  using the {+9}Be({+238}U,F) reaction at E=345 MeV/nucleon.  Two        
157CE3c  experiments, optimized for the transmission of {+158}Nd and {+170}Dy   
157CE4c  ions, were carried out with average beam intensities of 7 pnA and 12   
157CE5c  pnA, respectively. The identification of the nuclide of interest was   
157CE6c  made in the BigRIPS separator by determining the atomic number and the 
157CE7c  mass-to-charge ratio of the ion using the tof-B|r-|DE method. The      
157CE8c  reaction products were transported through the ZeroDegree Spectrometer 
157CE9c  and implanted into the beta-counting system WAS3ABi that was surrounded
157CEac  by the EURICA array comprising of 84 HPGe detectors. The typical       
157CEbc  implantation rate was ~~100 ions/s.  Measured: implanted ion-|b{+-}-t, 
157CEcc  implanted ion-|b{+-}-|g-t and implanted ions-|g-t correlations.        
157CEdc  Deduced: T{-1/2}.                                                      
157CE c  Others: 1997Be12 and 1994Be24                                          
157CE  L 0.0          (7/2+)           0.18 S    4                              
157CE2 L %B-=100 $ %B-N=?                                                       
157CE cL %B-$Only |b{+-} decay mode is expected.                                
157CE cL J$From systematics of known quasiparticle states in neighboring nuclei 
157CE2cL and the proposed configuration (by the evaluator). The assignment is   
157CE3cL tentative.                                                             
157CE cL T$From 2017Wu04, using a fit to the implanted ion-|b{+-}-t spectrum    
157CE2cL using the least-squares and maximum-likelihood methods. The data       
157CE3cL analysis included contributions from the parent, daughter and          
157CE4cL ground-daughter decays, as well as a constant background.              
157CE5cL T{-1/2}=0.175 s {I41} is reported in 2017Wu04                          
157CE cL CONF$|n7/2[633] Nilsson orbital, based on systematics of known         
157CE2cL structures in neighboring, well-deformed nuclei (by the evaluator). The
157CE3cL assignment is tentative.