ADOPTED LEVELS, GAMMAS for 45K

Author: T. W. Burrows |  Citation: Nucl. Data Sheets 109, 171 (2008) |  Cutoff date: 30-Oct-2007 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=4196.5 keV 7S(n)= 8905.5 keV 7S(p)= 11231.3 keV 17Q(α)= -1.173×104 keV 7
Reference: 2012WA38

References:
  A  45Ar β- decay  B  46Ca(t,α),(d,3He)
  C  48Ca(p,α) 

General Comments:

Levels: 1980Jo09 examined one-hole states using an extremely large model space. See below for the results on specific states used in the current evaluation. The calculations also predicted yrast states with Jπ=9/2+ to 15/2+ at 2.25, 2.7, 3.0, and 3.3 MeV.

Gammas: All data are from β- decay. See β- decay for unplaced transitions

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

Q-value: 2007Ya08: Ti(p,X) E=1.4 GeV. Measured masses; tandem Penning trap mass spectrometer, ISOLTRAP, and ISOLDE High-Resolution Separator at CERN. Relative mass uncertainty of δm/m=10×10-8 routinely reached. Reference ion: 39K+; Δ’ (39K)=-33807.01 keV 19 (2003Au03)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0ABC 3/2+ 17.81 m 61 
% β- = 100
     
   474.45 14 ABC 1/2+      474.43 15 
  100

     0.0
3/2+
  1020.03 4 ABC (3/2,5/2,7/2+) < 0.7 ns   1020.04 5 
  100
D,E2
     0.0
3/2+
  1081.38 5 ABC (5/2-,7/2-) 3.2 ns 4      61.34 5 
  1081.21 19 
  100.0 15 
    5.2 25 
D
(E1,M2)
  1020.03
     0.0
(3/2,5/2,7/2+)
3/2+
  1424.3 3 AB  1/2,3/2,5/2(+)      949.8 3 
  1424.4 5 
  100.0 12 
   65.3 12 


   474.45
     0.0
1/2+
3/2+
  1473.9 3 A   ≤ 0.7 ns   1473.6 3 
  100
D,Q
     0.0
3/2+
  1639.15 7 A C      557.76 9 
   619.25 12 
  1638.81 22 
   24.4 11 
   31.0 26 
  100.0 26 



  1081.38
  1020.03
     0.0
(5/2-,7/2-)
(3/2,5/2,7/2+)
3/2+
  1722.6 3 ABC     1722.5 3 
  100

     0.0
3/2+
  2188.22 8 A C      549.08 8 
  1106.82 8 
   23.8 15 
  100.0 33 


  1639.15
  1081.38

(5/2-,7/2-)
  2517.0 3 A       1042.8 3 
  1434.8 10 
  2517.9 5 
   92 15 
  100 21 
   88 16 



  1473.9
  1081.38
     0.0

(5/2-,7/2-)
3/2+
  2568.7 4 A        845.4 10 
  1548.5 5 
   34.6 6 
  100 6 


  1722.6
  1020.03

(3/2,5/2,7/2+)
  2747.9 6 A C     1323.2 6 
  2749.8 16 
   67 15 
  100 15 


  1424.3
     0.0
1/2,3/2,5/2(+)
3/2+
  2786.6 6 ?A C      597.8 5 ?
  100

  2188.22

  3311.18 24 A C     1123.1 5 
  1670.7 8 
  100 4 
   25 4 


  2188.22
  1639.15


  3398.3 6 ?A       1209.5 4 ?
  100

  2188.22

     3.44E+3 3   C        
     3.69E+3 3 ?  C (5/2+)        
  3707.2 3 A       1138.2 5 
  2283.2 7 
  2687.5 4 
  3703.2 13 
    2.0 6 
    2.5 7 
   27.8 27 
  100.0 28 




  2568.7
  1424.3
  1020.03
     0.0

1/2,3/2,5/2(+)
(3/2,5/2,7/2+)
3/2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  3753 10  B  (3/2+,5/2+)        
  3996.62 13 A C      597.8 5 ?
   685.3 2 
  1209.5 4 ?
  1808.38 16 
  2357.43 15 
  3995.3 15 
   <2.5
    9.2 13 
   <3.8
  100.0 26 
   59.6 16 
    2.1 5 






  3398.3
  3311.18
  2786.6
  2188.22
  1639.15
     0.0





3/2+
  4044.0 10 A       4043.8 10 
  100

     0.0
3/2+
  4357.3 4 A       1840.1 5 
  2885.0 20 
  3338.1 10 
  4356.0 10 
  100 18 
   38 15 
   66.7 24 
   58 12 




  2517.0
  1473.9
  1020.03
     0.0


(3/2,5/2,7/2+)
3/2+
  4569.1 10 A C     4568.9 10 
  100

     0.0
3/2+
     4.90E+3 3   C        
     5.13E+3 3   C        
     7.77E+3 5   C        
    12.62E+3 5   C (5/2-,7/2-)        

E(level): From β- decay, except as noted

Jπ(level): From angular momentum transfer in (t,α), except as noted. See β- decay (1980Hu10) for other suggested Jπ based on the assumption that Jπ(45Ar g.s.)=(7/2-)

T1/2(level): From γγ(t) in β- decay (1980Hu01), except for the g.s.

M(γ): From comparison to RUL, except as noted

Back to top

Back to top

Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
  1081.38 (5/2-,7/2-) 3.2 ns 4      61.34 5 D0.07B(E1)(W.u.)≤0.00059 8, B(M1)(W.u.)≤0.026 9, α=0.07 3, α(K)=0.060 24, α(L)=0.0051 20, α(M)=0.00055 21, α(N+)=2.0E-5 8
(5/2-,7/2-) 3.2 ns 4    1081.21 19 (E1,M2)7.E-5B(E1)(W.u.)≤6.E-9 3, B(M2)(W.u.)≤0.024 12, α=7.E-5 4, α(K)=6.E-5 4, α(L)=5.E-6 3, α(M)=6.E-7 4, α(N)=2.1E-8 12, α(N+)=2.1E-8 12

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.03/2+ 17.81 m 61 
% β- = 100
μ=+0.1734 8 (2005St24,1982To02), CONF=(P,D3/2,-1) (1978Pe04)
Jπ(level): C2((d,3He),g.s.) is considerably smaller than the results for 42Ca(d,3He) and 44Ca(d,3He), which were close to the theoretical expectation C2S=4.0. C2((d,3He),470)=1.0 is also about half the theoretical value of C2S=2.0 obtained from transitions to 43K and 41K. This result indicates a probable appreciable admixture of core-excited configurations in the g.s. wave function of 45K. (1971Yn02).
   474.451/2+   CONF=(P,S1/2,-1) (1978Pe04)
Jπ(level): C2((d,3He),g.s.) is considerably smaller than the results for 42Ca(d,3He) and 44Ca(d,3He), which were close to the theoretical expectation C2S=4.0. C2((d,3He),470)=1.0 is also about half the theoretical value of C2S=2.0 obtained from transitions to 43K and 41K. This result indicates a probable appreciable admixture of core-excited configurations in the g.s. wave function of 45K. (1971Yn02).
  2786.6   E(level): Tentative placement. The sum of the 597.8 and 1209.5 γ’s is 1807.3, an energy at which a γ is observed and assigned to the crossover transition 3.99-2.19 MeV; as there is no further evidence, the intermediate state could Be at 2.79 or 3.40 MeV.
  3398.3   E(level): Tentative placement. The sum of the 597.8 and 1209.5 γ’s is 1807.3, an energy at which a γ is observed and assigned to the crossover transition 3.99-2.19 MeV; as there is no further evidence, the intermediate state could Be at 2.79 or 3.40 MeV. See footnote on 2.79- or 3.40-MeV state. May Be the same as the following state.
     3.44E+3   E(level): From (p,α).
     3.69E+3(5/2+)   E(level): See footnote on 2.79- or 3.40-MeV state. May Be the same as the following state. From (p,α).
  3707.2   If Jπ(45Ar g.s.)=7/2-, then the 3690 state observed in (p,α) and this state are not the same since Jπ(3707)=5/2-,7/2- from γ to 3/2+ and log ft=4.7 1 from 45Ar g.s.
E(level): If Jπ(45Ar g.s.)=7/2-, then the 3690 state observed in (p,α) and this state are not the same since Jπ(3707)=5/2-,7/2- from γ to 3/2+ and log ft=4.7 1 from 45Ar g.s.
  3753(3/2+,5/2+)   E(level): From (t,α),(d,3He).
     4.90E+3   E(level): From (p,α).
     5.13E+3   E(level): From (p,α).
     7.77E+3   E(level): From (p,α).
    12.62E+3(5/2-,7/2-)   E(level): From (p,α).

Back to top