1NN    ADOPTED LEVELS                                          05NDS    200601
  1NN  H TYP=FUL$AUT=BALRAJ SINGH$CIT=NDS 106, 601 (2005)$CUT=31-Oct-2005$      
  1NN c  Neutron discovered by 1932Ch02.                                        
  1NN c  Instability of free neutron first proposed by 1935Ch01                 
  1NN c  The April 2004 conference (Gaithersburg, Maryland) proceedings         
  1NN2c  published in the Journal of Research, National Institute of            
  1NN3c  Standards and Technology, Volume 110, No. 3 and 4, May-August 2005     
  1NN4c  is devoted to neutron measurements.                                    
  1NN c  Reactions:                                                             
  1NN c  (e,e): 1982Ro12: measured magnetic form factor                         
  1NN c  (p,p): 1978Ma33: measured proton polarization                          
  1NN c  (pol p,p): 1985Ba30: measured spin polarization                        
  1NN  Q 782.347   1                                   2012WA38                 
  1NN cQ $Note: Current evaluation has used the following Q record              
  1NN2cQ 782.347   1                                   2003Au03                 
  1NN cQ Q-$ other: 782.33278 keV {I5} from adopted (by 2004Ei01)               
  1NN2cQ mass(neutron)-mass(proton)=1293.3317 keV {I5} and                      
  1NN3cQ mass(electron)=510.99892 keV {I4}                                      
  1NN  L 0.0         1/2+              613.9 S   6                              
  1NN2 L %B-=100$                                                               
  1NN2 L MOMM1=-1.9130427 5 (2004Ei01)$                                         
  1NN cL $ Electric dipole moment d <0.63|*10{+-25} ecm (2004Ei01,1999Ha03).    
  1NN cL $ Mean square charge radius <r{+2}>=-0.1161 fm{+2} {I22} (2004Ei01)    
  1NN cL J$measurements: 1954St90, 1950Ha67, 1937Sc09                           
  1NN cL T$ for free neutron decay, from evaluated mean lifetime=885.7 s {I8}   
  1NN2cL (2004Ei01). A recent measurement using an in-beam technique of         
  1NN3cL trapped protons in a cold neutron beam gives mean lifetime=886.3 s     
  1NN4cL {I12} (stat) {I32} (syst) (2005Ni13, also 2005Wi17). But another       
  1NN5cL measurement using ultracold neutrons and gravitational trap gives mean 
  1NN6cL lifetime of 878.5 s {I7} {I3} (2005Se01, also 2005Se17) which differs  
  1NN7cL by 6.5 |s's from the value adopted by 2004Ei01. Measurement by         
  1NN8cL 2003Va04 using neutrons in a non-uniform magnetic field reports mean   
  1NN9cL lifetime of 900.01 s {I15}, which represents an average of two sets of 
  1NN8cL values: one set giving 886.95 s {I15} and 888.87 s {I15}, the other    
  1NN9cL set giving 911.08 s {I15} and 913.01 s {I15}. Other:                   
  1NNAcL Mean lifetime=833 s {I+74-63} (2005Dz03)                               
  1NN cL T$ the value from 2004Ei01 represents an average of the following      
  1NN3cL measured mean lifetimes: 886.8 s {I12} {I32} (2003De25);               
  1NN4cL 885.4 s {I9} {I4} (2000Ar07,2000Ar01); 889.2 s {I30} {I38} (1996By03:  
  1NN5cL reanalysis of 1990By05,1989By04,1980By01); 882.6 s {I27}               
  1NN6cL (1993Ma62); 888.4 s {I31} {I11} (1992Ne11,1989Kh07);                   
  1NN7cL 887.6 s {I30} (1989Ma34,1989Ma58,1986Ag06); 891 s {I9} (1988Sp05,      
  1NN8cL 1978Bo42). Others: 881.0 s {I30} (2000Pi04,preliminary result),        
  1NN9cL 660 s {I+290-170} (2001Br15,magnetic trapping of ultracold neutrons);  
  1NNAcL 888.4 s {I29} (1990Al38); 893.6 s {I38} {I37}                          
  1NNBcL (1990By05); 878 s {I31} (1989Ko39,1989Sc37); 877 s {I10}               
  1NNCcL (1989Pa27,1989An15); 876 s {I21} (1988La04); ; 903 s {I13}             
  1NNDcL (1986Ko36); 937 s {I18} (1980By01); 875 s {I95} (1980Ko47); 881 s {I8} 
  1NNEcL (1978Bo42) and 918 s {I14} (1972Ch36,1967Ch27). See reviews            
  1NNFcL by 2004Ei01, 1995By02, 1992Sc02, 1990Fr20, 1989Er08 (also 1975Er10)    
  1NNGcL for methods and other details used in these measurements.              
  1NNHcL Earlier measurements: 1978Ku17, 1959Da06, 1959So15,                    
  1NNIcL 1951Ro25, 1950Ro15, 1950Sn68.                                          
  1NN cL T$ Other references relevant to discussion of T{-1/2}                  
  1NN2cL measurements: 1996Bo58, 1995Ig08 (also 1991Ig01), 1994Do27, 1991Ga06   
  1NN3cL (also 1990Ga32), 1990Gr06, 1984Li11, 1982Wi03                          
  1NN cL T$ For bound neutron decay, mean lifetime (|t)>1.9 |*10{+29} y         
  1NN2cL (2004Ei01,2004Ah03). Others: 2000Wa33, 2000Wa06, 1999Mc01, 1989Ph02.   
  1NN3cL See also 'adopted levels' for {+1}H. Possible decay modes are          
  1NN4cL listed in detail by 2004Ei01                                           
  1NN cL MOMM1$ 2004Ei01 adopt value from 2005Mo16 (2002 CODATA                 
  1NN2cL (http://physics.nist.gov/constants)) recommended value.                
  1NN3cL Measurements are by NMR method: 1979Gr25 (also 1982Gr27,               
  1NN4cL 1977Gr19), 1956Co57, 1949Ro15 (also 1950St88), 1948Bl29, 1938Po08.     
  1NN5cL See also reviews by 2005St24, 1976Fu06 and 1969Fu11.                   
  1NN cL $ Electric dipole moment measurements: 2001Fe10, 1999Ha03              
  1NN2cL (also 2000Ha09,1998Va23,1998Gr09), 1996Al25 (also 1992Al02),           
  1NN3cL 1990Sm01 (also 1989Th08), 1986Al35, 1984Pe04 (also 1984Mo15),          
  1NN4cL 1981Al10 (also 1980Al17), 1979Al30, 1973Dr12, 1970Ap01.                
  1NN5cL Others related measurements: 2001Io03, 2000Sc09