ADOPTED LEVELS, GAMMAS for 42Ar

Authors: Jun Chen and Balraj Singh |  Citation: Nucl. Data Sheets 135, 1 (2016) |  Cutoff date: 31-May-2016 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=599 keV 6S(n)= 9426 keV 6S(p)= 14400 keV 70Q(α)= -9986 keV 9
Reference: 2012WA38

References:
  A  42Cl β- decay (6.8 S)  B  40Ar(t,p)
  C  40Ar(t,pγ)  D  42Ar(p,p’)
  E  208Pb(40Ar,xγ)  F  PB(43Ar,nγ)

General Comments:

42Ar identified and produced by 1952Ka44 in successive thermal neutron capture in 40Ar, estimated half-life from its decay to 42K

Mass measurements: mass excess=-34422.7 58 (2001He29)

Q-value: S(2n)=15525 6, S(2p)=26163 7 (2012Wa38)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
      0.0ABCDEF 0+ 32.9 y 11 
% β- = 100
     
   1208.22 13 ABCDEF 2+ 2.6 ps +7-6    1208.17 13 
  100
E2
      0.0
0+
   2413.8 6 ABC EF (4+)     1205.6 5 
  100

   1208.22
2+
   2485.9 3 A C E  2+ 0.28 ps 11    1277.7 3 
  2486.1 8 
  100 4 
   15.5 25 

E2
   1208.22
      0.0
2+
0+
   2512.5 4 ABC    (0+:4+) 2.8 ps +21-8    1304.3 3 
  100

   1208.22
2+
   3013.7 3 A C    (1,2+) < 83 fs   1806.2 4 
  3014.6 8 
  100 7 
   61 7 


   1208.22
      0.0
2+
0+
   3096.1 5 ABC E  4+ > 3.5 ps   1887.8 4 
  100
E2(+M3)
   1208.22
2+
   3557.9 4 ABC    2+ < 62 fs   2349.6 3 
  3557.7
  100 2 
   11 2 
D(+Q)
[E2]
   1208.22
      0.0
2+
0+
   3564.3 6     E  (6+)     1150.4 3 
 

   2413.8
(4+)
   3705 10  B     (2+)        
   3820 20 AB            
   4005.3 4  BC    2+ 0.23 ps 6     991.6
  1519.40 22 
  2797.0
 
 
 



   3013.7
   2485.9
   1208.22
(1,2+)
2+
2+
   4013.6 8 A          1527.7
  1598.5 8 ?
  2805.3 7 
  4013.4
 
   25 4 
  100 8 
 




   2485.9
   2413.8
   1208.22
      0.0
2+
(4+)
2+
0+
   4045.8 4 A          1560.1 5 
  2837.3 5 
  4045.6
   32.6 21 
  100 4 
 



   2485.9
   1208.22
      0.0
2+
2+
0+
   4127.5 5 ABC    (0+,1,2) 0.97 ps 21    1641.6
  2919.2 4 
 
  100


   2485.9
   1208.22
2+
2+
   4287.1 5  BC    (1,2,3) < 35 fs   3078.8 4 
 

   1208.22
2+
   4405 5  B     3-,4+        
   4417.3 3 A           403.9 6 ?
  1404.7 4 
  1931.7 6 
  2003.4 3 ?
  3208.3 3 
    8.4 19 
   15 3 
   41 4 
   21 4 
  100 4 





   4013.6
   3013.7
   2485.9
   2413.8
   1208.22

(1,2+)
2+
(4+)
2+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   4633.9 6 ABC    (3-) < 35 fs   3425.5 5 
  100
D
   1208.22
2+
   4887 10  B     (3-,4+)        
   4896 10 AB     (3-,4+)        
   5000 15 AB            
   5230 15  B            
   5292 15 AB            
   5553 15  B     2+        
   5763 15  B            
   5945 20  B            
   6090 20  B            
   6170 15  B            
   6357 15  B            
   6490 20  B            
   6614 20  B            
   6742 15  B            
   6880 30  B            
   7060 20  B            
   7140 20  B            
   7275 15  B            
   7355 15  B            
   7540 30  B            
   7630 30 AB            
   7793 15  B            
   7987 15  B            
   8080 30  B            
   8230 30  B            
   8380 20  B            
   8520 20  B            
   8690 20  B            
   8790 20  B            
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   8940 30  B            
   9020 30  B            
   9130 30  B            
   9210 20  B            
   9320 30  B            
   9410 30  B            
   9535 25  B            
   9640 30  B            
   9820 20  B            
   9905 20  B            
  10015 20  B            
  10060 30  B            
  10140 30  B            
  10300 30  B            
  10540 30  B            
  10590 30  B            
  10670 30  B            
  10850 30  B            

E(level): From adopted Eγ data when measured γ-ray energies are available. In other cases weighted averages are taken of values available from different reactions

Jπ(level): In (t,p) transfer reaction, target 40Ar Jπ=0+

T1/2(level): From DSAM in (t,pγ), unless otherwise noted

E(γ): Values with uncertainties from (t,pγ), β- decay or (40Ar,Xγ). Weighted averages are taken when available. Others are from level energy differences.

I(γ): From (t,pγ), when a level is populated in β- decay and in (t,pγ) and others from β- decay, unless otherwise noted.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Yrast sequence (2011Sz02)
      0.0 0+ 32.9 y 11 
% β- = 100
     
   1208.22 13  2+ 2.6 ps +7-6    1208.17 13 
  100
E2
      0.0
0+
   2413.8 6  (4+)     1205.6 5 
  100

   1208.22
2+
   3564.3 6  (6+)     1150.4 3 
 

   2413.8
(4+)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Additional Data
   1208.22 2+ 2.6 ps +7-6    1208.17 13 E2 B(E2)(W.u.)=9.8 +29-21
   2485.9 2+ 0.28 ps 11    2486.1 8 E2 B(E2)(W.u.)=0.33 14
   3096.1 4+ > 3.5 ps   1887.8 4 E2(+M3)+0.07 8B(E2)(W.u.)<0.76
   3557.9 2+ < 62 fs   2349.6 3 D(+Q)0.00 7 
2+ < 62 fs   3557.7[E2] B(E2)(W.u.)>0.18

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.00+ 32.9 y 11 
% β- = 100
The rms charge radius (<r2>)1/2=3.4354 fm 39 (2013An02 evaluation.
E(level): The rms charge radius (<r2>)1/2=3.4354 fm 39 (2013An02 evaluation. Yrast sequence (2011Sz02).
   1208.222+ 2.6 ps +7-6  β2=0.32 5 (2001Sc01)
In a review article by 2008BeZH, Fig. 4 seems to give g factor for the first 2+ states in 38,40,42Ar, but from Fig. 3 in 2006Sp01 (reference 18 in 2008BeZH), the isotopes should be 36,38,40Ar, instead. It would seem that the x-axis in 2008BeZH is erroneously marked in neutron number.
E(level): In a review article by 2008BeZH, Fig. 4 seems to give g factor for the first 2+ states in 38,40,42Ar, but from Fig. 3 in 2006Sp01 (reference 18 in 2008BeZH), the isotopes should be 36,38,40Ar, instead. It would seem that the x-axis in 2008BeZH is erroneously marked in neutron number. Yrast sequence (2011Sz02).
   2413.8(4+)   Measured upper limit of branching is <10 for transition to g.s.
E(level): Measured upper limit of branching is <10 for transition to g.s. Yrast sequence (2011Sz02).
   2512.5(0+:4+) 2.8 ps +21-8  Measured upper limit of branching is <10 for transition to g.s.
E(level): Measured upper limit of branching is <10 for transition to g.s.
   3096.14+ > 3.5 ps Measured upper limit of branching is <5 for transition to g.s. (1973Pr10).
   3564.3(6+)   E(level): Yrast sequence (2011Sz02).
   3820   XREF: α(3846).
   4013.6   See comment for 4005.3 level for possible population in (t,p).
   4127.5(0+,1,2) 0.97 ps 21  Measured upper limit of branching is <5% for transition to g.s.
E(level): Measured upper limit of branching is <5% for transition to g.s.
   7630   E(level): Possible γ to g.s. from a 7648 level in 42Cl β-.

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