227AM    191IR(40AR,4N):NUC ID:?       2022MA45                           202210
227AM c  Compiled (unevaluated) dataset from 2022MaA45                          
227AM2c  Phys Rev C 106, 034316 (2022).                                         
227AM c  Compiled by B. Singh (McMaster), Sept 23, 2022                         
227AM c  Experimental search for the existence of {+227}Am proved unsuccessful. 
227AM c  2022Ma45: attempt to produce a new {+227}Am nuclide in 4n-evaporation  
227AM2c  channel in {+191}Ir({+40}Ar,xn){+231}Am{+*},E({+40}Ar)=190-204 MeV.    
227AM3c  Experiments were performed at the HRIFL-Lanzhou facility using the     
227AM4c  SHANS gas-filled recoil separator for extracting evaporation residues  
227AM5c  (EVRs). Target was enriched {+191}Ir with a thickness of 410 |mg/cm{+2}
227AM6c  sputtered on to 60 |mg/cm{+2} thick carbon foil. Evaporation residue   
227AM7c  recoils were implanted in three position-sensitive 16-strip Si         
227AM8c  detectors (PSSDs) for the detection of evaporation residues (EVRs).    
227AM9c  Eight side silicon detectors (SSDs) were used in an open box geometry  
227AMAc  to detect the |a particles escaping from the PSSDs. Measured energy,   
227AMBc  position, and time of the implantation of the EVRs and subsequent      
227AMCc  |a-|a-|a decay events correlated with the EVRs. No evidence was found  
227AMDc  for the events related to the production of {+227}Am. Absence of this  
227AMEc  nuclide is explained in terms of reduced survival probabilities of the 
227AMFc  compound nucleus {+231}Am due to its low fission barriers at high      
227AMGc  excitations. Upper limit of cross section was determined as <5.4 pb    
227AMHc  for the production of the compound nucleus {+231}Am.                   
227AM  L 0                                                                     ?
227AM2 L %A=? $ %SF=?