228AM    193IR(40AR,5N):NUC ID:?       2022MA45                           202210
228AM c  Compiled (unevaluated) dataset from 2022Ma45:                          
228AM2c  Phys Rev C 106, 034316 (2022).                                         
228AM c  Compiled by B. Singh (McMaster), Sept 23, 2022                         
228AM c  Experimental search for the existence of {+228}Am proved unsuccessful. 
228AM c  2022Ma45: attempt to produce a new {+228}Am nuclide in 5n-evaporation  
228AM2c  channel in {+193}Ir({+40}Ar,xn){+233}Am{+*},E({+40}Ar)=190-204 MeV.    
228AM3c  Experiments were performed at the HRIFL-Lanzhou facility using the     
228AM4c  SHANS gas-filled recoil separator for extracting evaporation residues  
228AM5c  (EVRs). Target was enriched {+193}Ir with a thickness of 360 |mg/cm{+2}
228AM6c  sputtered on to 60 |mg/cm{+2} thick carbon foil. Evaporation residue   
228AM7c  recoils were implanted in three position-sensitive 16-strip Si         
228AM8c  detectors (PSSDs) for the detection of evaporation residues (EVRs).    
228AM9c  Eight side silicon detectors (SSDs) were used in an open box geometry  
228AMAc  to detect the |a particles escaping from the PSSDs. Measured energy,   
228AMBc  position, and time of the implantation of the EVRs and subsequent      
228AMCc  |a-|a-|a decay events correlated with the EVRs. No evidence was found  
228AMDc  for the events related to the production of {+228}Am. Absence of this  
228AMEc  nuclide is explained in terms of reduced survival probabilities of the 
228AMFc  compound nucleus {+233}Am due to its low fission barriers at high      
228AMGc  excitations. Upper limit of cross section was determined as <31.4 pb   
228AMHc  for the production of the compound nucleus {+233}Am.                   
228AM  L 0                                                                     ?
228AM2 L %A=? $ %SF=?