81NB    ADOPTED LEVELS                                          25NDS    202501
 81NB  H TYP=FUL$AUT=M. Shamsuzzoha Basunia$CIT=NDS 199, 271 (2025)$            
 81NB2 H CUT=1-Sep-2024$                                                        
 81NB  Q -14900    SY 16010  SY -1110  SY -2350  SY    2021WA16                 
 81NB cQ $|DQ(|b{+-})=640, |DS(n)=570, |DS(p)=500, |DQ(|a)=450 (syst,2021Wa16)  
 81NB cQ $S(2n)=30850 {I640}, S(2p)=3140 {I410}, Q(|ep)=7500 {I400}             
 81NB2cQ (syst,2021Wa16)                                                        
 81NB c                                                                         
 81NB c  Search for {+81}Nb proved negative (2017Su26).                         
 81NB c                                                                         
 81NB c  2001Ki13,1994He28: Production: fragmentation of 112 GeV {+112}Sn beam  
 81NB2c  incident on a Be target; 0|' magnetic spectrometer for determination of
 81NB3c  fragment trajectories (FWHM=0.32 for A, 0.23 for Z) prior to           
 81NB4c  implantation into stack of 4 double-sided Si detectors with stacks of  
 81NB5c  seven-fold segmented Si detectors on either side for |b detection and  
 81NB6c  surrounded by a segmented NaI detector and a Ge clover detector;       
 81NB7c  measured correlation between implants and daughters, T{-1/2} (2000StZU,
 81NB8c  2001Ki13). Also, a few events (|?4 per 10{+14} {+106}Cd ions),         
 81NB9c  apparently corresponding to {+81}Nb, were observed in                  
 81NBAc  Ni+{+106}Cd, E({+106}Cd)=60 MeV/A using projectile fragment separator  
 81NBBc  (fig. 1(b), 1994He28); however, the attribution of those events to     
 81NBCc  contamination from neighboring peaks in the Z and Q spectra could not  
 81NBDc  be ruled out (1994He28).                                               
 81NB c  2017Su26: {+81}Nb nuclide searched for in {+9}Be({+124}Xe,X),          
 81NB2c  E({+124}Xe)=345 MeV/nucleon beam produced by the cascade operation of  
 81NB3c  the RIBF accelerator complex of the linear accelerators RILAC and      
 81NB4c  RILAC-II and the four cyclotrons, RRC, fRC, IRC, and SRC.              
 81NB5c  Identification of {+81}Nb nuclei was made on the basis of magnetic     
 81NB6c  rigidity, time-of-flight and energy loss (tof-B|r-|DE method) of the   
 81NB7c  fragments using BigRIPS fragment separator, atomic number Z of fragment
 81NB8c  by tof and |DE, and A/Q (atomic mass/charge state) of fragment by B|r  
 81NB9c  and tof. Time-of-flight was measured using thin plastic                
 81NBAc  scintillators, |DE by MUSIC ionization chambers, and B|r by particle   
 81NBBc  trajectory reconstructions. Experiments were performed at              
 81NBCc  RIBF-RIKEN facility. Measured A/Q versus Z distributions.              
 81NBDc  No events were observed for {+81}Nb, indicating its unbound            
 81NBEc  character towards proton emission. (Edited/Adapted the XUNDL dataset   
 81NBFc  compiled by B. Singh (McMaster), Dec 22, 2017).                        
 81NB  L 0.0                           40 NS     LT                             
 81NB2 L %EC+%B+=?$                                                             
 81NB cL T         from 2017Su26, based on the production yield systematics of  
 81NB2cL neighboring isotopes, the tof, and in-flight decay; the estimated      
 81NB3cL counts of {+81}Nb was 2080 in the {+124}Xe+Be, E=345 MeV/A,            
 81NB4cL reaction and tof=440 ns, and assumed observation limit of 1 count.     
 81NB5cL Others: <200 ns (2001Ki13 - from parent-daughter time correlation),    
 81NB6cL <80 ns (1999Ja02 - assuming the observation limit of 1 count and       
 81NB7cL expected yield relative to the neighboring isotopes).