ADOPTED LEVELS, GAMMAS for 44Ar

Authors: Jun Chen, Balraj Singh and John A. Cameron |  Citation: Nucl. Data Sheets 112, 2357 (2011) |  Cutoff date: 31-Jul-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=3108.2 keV 17S(n)= 8735 keV 6S(p)= 1.564×104 keV 10Q(α)= -12260 keV 5
Reference: 2012WA38

References:
  A  44Cl β- decay (0.56 S)  B  45Cl β-n decay
  C  C(46K,pnγ)  D  48Ca(3He,7Be)
  E  48Ca(48Ca,44ArG)  F  Coulomb Excitation
  G  208Pb(48Ca,xγ) 

General Comments:

Other measurements:

T1/2 of 44Ar: 1970Hu11, 1969La16

Reaction cross sections and radii for f-p shell nuclei: 1997Li15

Mass measurement: 2003Bl17

2006Ro34: 2H(48Ca,X), measured production cross-section

2004De41: natCu(7Li,X), E=35 MeV, measured cross-section

2001Sc01: 1H(44Ar,44Ar’) E=33.0 MeV and 44Ar(p,p’) E=33.2 MeV, measured cross section, deduced B(E2)

2001Vo09: 48Ca(p,pα), populated ground state of daughter nucleus

1999Ai02: 44Ar beam from 55Mn fragmentation, Si(44Ar,X) studied.

1971Ar32: 232Th(40Ar,X), E=290 MeV, measured fragments isotopic yields.

Q-value: Note: Current evaluation has used the following Q record

Q-value: S(2n)=14393 6, S(2p)=29570 120 (2011AuZZ,2003Au03)

Q-value: Values in 2003Au03: Q(β-)=3140 40, S(p)=15790 160, Q(α)=-12330 140. Others are the same as in 2011AuZZ










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0ABCDEFG 0+ 11.87 m 5 
% β- = 100
     
   750 30 ?   D    0+        
  1157.97 11 ABC EFG 2+ 4.7 ps 7    1158.11 12 
  100 4 
[E2]
     0
0+
  1610 30    D    (2+)        
  2010.61 12 AB   F  (2+) 1.5 ps 2     852.77 10 
  2010.18 18 
  100.0 21 
   68.8 21 
[M1,E2]
[E2]
  1157.97
     0
2+
0+
  2746.2 3 A C E G (4+) 2.7 ps +25-20    1588.1 3 
  2747.0 8 
  100 8 
   47 8 


  1157.97
     0
2+
0+
  2975.90 16 A       (0+:4+)      965.32 12 
  1817.7 3 
  100 7 
   47 5 


  2010.61
  1157.97
(2+)
2+
  3439   DE G (6+) > 27.7 ps    693
  100
[E2]
  2746.2
(4+)
  3980 50    D           
  4430 40    D           
  4806.7 5 A       (0+:4+)     2796.0 4 
  100

  2010.61
(2+)
  5351.5 4 A       (0+:4+)     2375.6 3 
  3338.4 15 
  100 6 
   41 7 


  2975.90
  2010.61
(0+:4+)
(2+)

E(level): From least-squares to Eγ data for levels populated in γ-ray studies. Others are from reaction studies.

Jπ(level): Predicted from Shell Model calculations (1999Wa21,2000Fo03,1976Cr03) and systematics of even-even nuclei, unless otherwise noted.

T1/2(level): From the differential recoil distance Doppler shift method in 208Pb(48Ca,Xγ), unless otherwise noted

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Additional Gamma Data:











E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityAdditional Data
  1157.97 2+ 4.7 ps 7    1158.11 12 [E2]B(E2)(W.u.)=6.3 10
  2010.61 (2+) 1.5 ps 2    2010.18 18 [E2]B(E2)(W.u.)=0.51 7
  3439 (6+) > 27.7 ps    693[E2]B(E2)(W.u.)<14

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 11.87 m 5 
% β- = 100
The rms charge radius (<r2>)1/2=3.4454 fm 22 from δ<r2>(38Ar,44Ar)=+0.289 fm2 9(stat) 81(syst) (2008Bl01, laser spectroscopy). Evaluated (<r2>)1/2=3.4454 fm 46 (2008 evaluation by I. Angeli available on http://cdfe.sinp.msu.ru).
  2746.2(4+) 2.7 ps +25-20  XREF: C(2610).
  3439(6+) > 27.7 ps XREF: d(3930).

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Additional Gamma Comments:

E(level)E(gamma)Comments
  1157.97  1158.11M(γ): Implied from Coulomb Excitation
  2010.61   852.77M(γ): Implied from Coulomb Excitation
  2010.18M(γ): Implied from Coulomb Excitation

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