ADOPTED LEVELS, GAMMAS for 47K

Authors: S. Ota and E.A. Mccutchan |  Citation: Nucl. Data Sheets 203, 1 (2025) |  Cutoff date: 1-Apr-2025 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=6633 keV 3S(n)= 8369.4 keV 16S(p)= 13230 keV 3Q(α)= 13980 keV 60
Reference: 2021WA16

References:
  A  47Ar β- decay: TENTATIVE  B  1H(46Ar,p):resonance
  C  48Ca(MU,xγ)  D  48Ca(E,E’p),(p,2p)
  E  48Ca(d,3He),(pol d,3He),(t,α)  F  48Ca(48Ca,xγ)
  G  198Pt(48Ca,xγ) 

General Comments:

Note: Mass excess measurements (uncertainty=1.4 keV) reported in 2012La05.

2013Pa11,2014Pa45,2014Kr04: E(p)=1.4 GeV incident on UCx target at ISOLDE-CERN facility. Fragments diffused out of target and surface ionized, then accelerated to 40 kV, followed by mass separation and bunched by gas-filled Paul Trap (ISCOOL). Hyperfine structure was studied by collinear laser spectroscopy.

2021Ko08, 2019Ko19: 1.4 GeV proton beam incident on a UCx target followed by surface ionization and mass separation using a high-resolution separator (HRS). Ions then cooled and bunched in a linear Paul trap (ISCOOL). Laser spectroscopy performed with the Collinear Resonance Ionization Spectroscopy (CRIS) setup at the ISOLDE facility at CERN. Measured energy differences between atomic hyperfine transitions relative to 39K; deduced isotope shift and charge radius.

Other: 2017Ne04

Gammas: See β- decay for unplaced gammas

Q-value: S(2n)=15239.0 15, S(2p)=32030 14 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0A CDEFG 1/2+ 17.38 s 3 
% β- = 100
     
   360.2 7 A CDEFG 3/2+ 1.1 ns 3     360
  100
[M1,E2]
     0
1/2+
  2020.2 8 A   EFG (7/2-) 6.3 ns 4    1660
  2020?
  100 9 
   13.2 19 
(M2)
[E3]
   360.2
     0
3/2+
1/2+
  2286.9 11      F       267
  100

  2020.2
(7/2-)
  3339.5 11     EF  (5/2)+     1319
  100

  2020.2
(7/2-)
  3432 19    DE   (5/2)+        
  3717.8 8 A   E   (3/2,1/2)     3357?
  3718?
    7 7 
  100 15 


   360.2
     0
3/2+
1/2+
  3762.3 10 A       (3/2,5/2-)     1742
  3402?
  100 10 
   10 5 


  2020.2
   360.2
(7/2-)
3/2+
     3.85E+3 2    DE   1/2+        
     3.93E+3 2    DE   3/2+        
     4.17E+3 6     E          
     4.36E+3 4     E          
  4433.7 13      F      1094
  2147
 
 


  3339.5
  2286.9
(5/2)+

     4.74E+3 4     E          
     4.90E+3 4     E          
  5220 20    DE   5/2+        
  5465 25    DE   5/2+        
     5.79E+3 2     E          
  5842.4 13 A       (3/2,5/2-)     3822
  100

  2020.2
(7/2-)
     6.15E+3 4     E   5/2+,3/2+        
     6.26E+3 4     E          
     6.42E+3 4     E          
  6462 32    DE   (5/2)+        
     6.87E+3 4    DE   (5/2)+        
     7.15E+3 5     E          
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     7.38E+3 4     E          
     7.57E+3 3     E   (5/2)+        
  7762 33    DE   (5/2)+        
  8035 38    DE   (5/2)+        
  8530 20 ?    E   5/2+,3/2+        
    15.91E3 11  B      3/2- 15 keV 10       
    16.13E3 12  B      1/2+ 30 keV 10       
    16.51E3 13  B      1/2+ 18 keV 10       
    16.88E3 14  B      1/2- 34 keV 10       

E(level): From a least-squares fit to Eγ, by evaluators assuming ΔE=1 keV for levels connected by gamma-rays. For states observed only in transfer, from 48Ca(d,3He),(pol d,3He),(t,α), except where noted.

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   360.2 3/2+ 1.1 ns 3     360[M1,E2]0.0011α=0.0011 6, α(K)=1.0×10-3 6, α(L)=9.E-5 5, α(M)=1.0E-5 5, α(N)=3.5E-7 19
  2020.2 (7/2-) 6.3 ns 4    1660(M2)9.12×10-5B(M2)(W.u.)=0.0265 +19-17, α=9.12×10-5 13, α(K)=3.70E-5 5, α(L)=3.10E-6 4, α(M)=3.37E-7 5, α(N)=1.242E-8 17
(7/2-) 6.3 ns 4    2020[E3]2.06×10-4B(E3)(W.u.)=1.26 20, α=2.06E-4 3, α(K)=2.61E-5 4, α(L)=2.190E-6 31, α(M)=2.376E-7 33, α(N)=8.76E-9 12

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     01/2+ 17.38 s 3 
% β- = 100
μ=+1.9292 58 (2013Pa11,2014Pa45), T=9/2
δν39,47=857.5 MHz 17 (2014Kr04), 858.4 MHz 9 (2021Ko08).
E(level): δν39,47=857.5 MHz 17 (2014Kr04), 858.4 MHz 9 (2021Ko08).
  3339.5(5/2)+   XREF: E(3350).
    15.91E33/2- 15 keV 10  Tz=11/2.
E(level): Deduced from Eres(c.m.) and Sp=13230 3 (2021Wa16) by evaluators.
    16.13E31/2+ 30 keV 10  Tz=9/2.
E(level): Deduced from Eres(c.m.) and Sp=13230 3 (2021Wa16) by evaluators.
    16.51E31/2+ 18 keV 10  Tz=9/2.
E(level): Deduced from Eres(c.m.) and Sp=13230 3 (2021Wa16) by evaluators.
    16.88E31/2- 34 keV 10  Tz=11/2.
E(level): Deduced from Eres(c.m.) and Sp=13230 3 (2021Wa16) by evaluators.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   360.2   360E(γ): From 48Ca(48Ca,Xγ)
  2020.2  1660M(γ): Q from W(in plane)/W(out of plane) in 198Pt(48Ca,Xγ); Δπ=yes from level scheme
  2286.9   267E(γ): From 48Ca(48Ca,Xγ)
  3339.5  1319E(γ): From 48Ca(48Ca,Xγ)
  4433.7  1094E(γ): From 48Ca(48Ca,Xγ)
  2147E(γ): From 48Ca(48Ca,Xγ)

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