ADOPTED LEVELS, GAMMAS for 154Pm

Author: C. W. Reich |  Citation: Nucl. Data Sheets 110, 2257 (2009) |  Cutoff date: 1-May-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=3.94×103 keV 5S(n)= 5.94×103 keV 5S(p)= 8.47×103 keV 5Q(α)= -2.64×103 keV 5
S(2n)= 1.340×104 keV 5S(2p)= 1.933×104 keV 5
Reference: 2017WA10

General Comments:

These data are from the β- decay of 154Nd and the decay of the 1.73-min and 2.68-min levels in 154Pm. There are no definitive data on the relative energies of these two 154Pm levels.









E(level)
(keV)		Jπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0 (3,4) 2.68 m 7 
% β- = 100
     
     X (0-,1-) 1.73 m 10 
% β- = 100
     
    50.688+X 14        50.691 22 
  100
E2
     X
(0-,1-)
    68.006+X 16        17.3
    68.000 22 
 
  100

M1
    50.688+X
     X

(0-,1-)
    79.383+X 23        28.7 3 
    79.38 15 
   12
  100
M1
M1,E2
    50.688+X
     X

(0-,1-)
   105.69+X 4        37.63 6 
   105.7 3 
  100
   12
M1(+E2)

    68.006+X
     X

(0-,1-)
   151.702+X 14  (1+)       45.99 4 
    72.319 22 
    83.697 20 
   101.019 20 
   151.703 20 
   11.7
   10.4
   53
   45
  100

E1
E1


   105.69+X
    79.383+X
    68.006+X
    50.688+X
     X




(0-,1-)
   154.93+X 6        87.7 3 
   104.20 9 
    0.7
  100


    68.006+X
    50.688+X


   173.81+X 5        95.0 3 
   122.95 10 
    4.6
  100

M1,E2
    79.383+X
    50.688+X


   180.686+X 16       130.002 20 
   180.693 22 
   73
  100
E1
E1
    50.688+X
     X

(0-,1-)
   185.49+X 3        30.8 3 
    33.8 2 
    79.75 25 
   106.4 3 
   117.480 25 
   134.85 12 
   185.0 3 
    1.5
   15
   11
    2.9
  100
    3.3
    3.5

M1(+E2)


E1


   154.93+X
   151.702+X
   105.69+X
    79.383+X
    68.006+X
    50.688+X
     X

(1+)




(0-,1-)
   194.19+X 4        13.5
   114.81 3 
   126.15 8 
   194.3 3 
 
  100
   16
    5

(E1)


   180.686+X
    79.383+X
    68.006+X
     X



(0-,1-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   244.61+X 4        63.94 5 
    70.78 4 
    89.69 8 
   165.21 5 
   176.5 3 
   193.7 3 
   244.70 15 
   11
    8.3
    6.4
  100
    8.3
    8.3
    6.9
M1
E1
E1




   180.686+X
   173.81+X
   154.93+X
    79.383+X
    68.006+X
    50.688+X
     X






(0-,1-)
   268.8+X 3       218.5 4 
  100

    50.688+X

   505.49+X 24 ?      425.2 5 ?
   454.8 5 ?
   83
  100


    79.383+X
    50.688+X


   597.4+X 3       416.7 3 
  100

   180.686+X

   633.85+X 9       453.4 3 
   482.1 3 
   554.6 3 
   566.2 5 
   23
   17
  100
   20




   180.686+X
   151.702+X
    79.383+X
    68.006+X

(1+)


   652.4+X 3       383.5 5 
   471.7 3 
   50
  100


   268.8+X
   180.686+X


   682.31+X 8       176.5 3 
   414.0 4 
   501.8 3 
   508.7 4 
   527.3 4 
   602.8 3 
   613.6 4 
    8.6
   15
   31
   43
   31
  100
   12







   505.49+X
   268.8+X
   180.686+X
   173.81+X
   154.93+X
    79.383+X
    68.006+X







   700.0+X 3 ?      505.8 3 ?
  100

   194.19+X

   831.55+X 8       197.9 3 
   587.0 4 
   637.4 3 
   645.9 5 
   650.3 3 
   763.66 15 
   780.79 15 
   831.59 15 
   ≤2.6
    4.3
   19
    5.2
   18
   10
  100
   84








   633.85+X
   244.61+X
   194.19+X
   185.49+X
   180.686+X
    68.006+X
    50.688+X
     X







(0-,1-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   850.23+X 3  1+      167.89 8 
   216.40 10 
   605.51 10 
   669.7 4 
   676.6 4 
   695.2 5 
   698.73 20 
   744.45 25 
   770.90 20 
   782.7 3 
   799.55 4 
   850.20 5 
    2.7
    3.1
   13
    1.6
    0.6
    0.6
    5.6
   11
    3.7
    1.3
  100
   49












   682.31+X
   633.85+X
   244.61+X
   180.686+X
   173.81+X
   154.93+X
   151.702+X
   105.69+X
    79.383+X
    68.006+X
    50.688+X
     X






(1+)




(0-,1-)
   906.96+X 5       662.2 4 
   721.46 5 
   726.27 10 
   755.34 12 
   827.51 15 
   839.0 3 
    3.0
  100
   54
   49
    6.4
   35






   244.61+X
   185.49+X
   180.686+X
   151.702+X
    79.383+X
    68.006+X



(1+)


  1049.64+X 8       804.96 25 
   855.4 3 
   864.16 15 
   868.95 20 
   944.08 20 
   970.0 3 
   981.4 3 
   999.06 20 
  1049.7 4 
   25
    7.0
  100
   31
   34
   12
   21
   32
    7.7









   244.61+X
   194.19+X
   185.49+X
   180.686+X
   105.69+X
    79.383+X
    68.006+X
    50.688+X
     X








(0-,1-)
  1060.52+X 8       815.9 3 
   866.4 3 
   875.02 15 
   908.78 12 
   981.4 3 
   992.6 3 
  1060.6 3 
    5.7
   25
   43
  100
   10
   14
    6.4







   244.61+X
   194.19+X
   185.49+X
   151.702+X
    79.383+X
    68.006+X
     X



(1+)


(0-,1-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1204.50+X 11       960.0 3 
  1010.2 3 
  1018.85 25 
  1024.1 3 
  1052.79 20 
  1136.5 4 
  1153.7 3 
   50
    5.4
  100
   27
   68
   25
   22







   244.61+X
   194.19+X
   185.49+X
   180.686+X
   151.702+X
    68.006+X
    50.688+X




(1+)


  1389.21+X 10      1194.7 3 
  1283.51 15 
  1310.4 4 
  1321.17 20 
  1389.22 20 
    4.1
  100
   13
   96
   31





   194.19+X
   105.69+X
    79.383+X
    68.006+X
     X




(0-,1-)
  1662.70+X 20      1417.6 3 
  1482.3 3 
  1583.8 5 
  320
  100
  100



   244.61+X
   180.686+X
    79.383+X



  1690.0+X 4      1509.6 4 
  1583.8 5 
  100
   24


   180.686+X
   105.69+X


E(level): From the 154Nd β- decay, except the pseudolevels are not adopted since they may represent several actual levels.

Jπ(level): There are conflicts concerning the Jπ assignments between the experimental data and the detailed model-dependent arguments of 1990So08. 1990So08 propose configurations for the 0+x, 50+x, 151+x, and 850+x levels that all have positive parity. However, 1993GrZZ report E1 γ’s from the 151+x level, which implies it is of opposite parity from the 0+x and 50+x levels. For several levels, the configurations of 1990So08 are given; for other discussions of the configurations, see 1971Da28, 1972Ta13, 1973Pr05, and 1974Ya07.

Jπ(level): For possible Jπ assignments for those levels where none are listed here, see the 154Nd β- decay data set.

E(γ): Unplaced γ’s are not included here, see 154Nd β- decay.

E(γ): From 154Nd β- decay (1993GrZZ).

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
    50.688+X       50.691 22 E230.4α=30.4
    68.006+X       68.000 22 M14.71α=4.71
    79.383+X       28.7 3 M116α=16 4
      79.38 15 M1,E24.2α=4.2 12
   105.69+X       37.63 6 M1(+E2)5.6α5.6 AP
   151.702+X (1+)       72.319 22 E10.643α=0.643
(1+)       83.697 20 E10.434α=0.434
   173.81+X      122.95 10 M1,E20.97α=0.97 12
   180.686+X      130.002 20 E10.1307α=0.1307
     180.693 22 E10.0535α=0.0535
   185.49+X       33.8 2 M1(+E2)8.6α8.6 AP
     117.480 25 E10.1736α=0.1736
   194.19+X      114.81 3 (E1)0.183α=0.183
   244.61+X       63.94 5 M15.62α=5.62
      70.78 4 E10.681α=0.681
      89.69 8 E10.359α=0.359

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments

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Additional Gamma Comments:

E(level)E(gamma)Comments
   154.93+X    87.7E(γ): Existence and placement of γ is questionable.
   173.81+X    95.0E(γ): Existence and placement of γ is questionable.
   244.61+X   176.5E(γ): Multiply placed with undivided intensity
I(γ): Multiply placed with undivided intensity
   633.85+X   566.2E(γ): Existence and placement of γ is questionable.
   682.31+X   176.5E(γ): Multiply placed with undivided intensity
I(γ): Multiply placed with undivided intensity
   613.6E(γ): Existence and placement of γ is questionable.
   831.55+X   645.9E(γ): Existence and placement of γ is questionable.
   850.23+X   695.2E(γ): Existence and placement of γ is questionable.
  1049.64+X   970.0E(γ): Existence and placement of γ is questionable.
  1049.7E(γ): Existence and placement of γ is questionable.
  1204.50+X  1153.7E(γ): Existence and placement of γ is questionable.
  1389.21+X  1310.4E(γ): Existence and placement of γ is questionable.
  1389.22E(γ): Existence and placement of γ is questionable.
  1662.70+X  1417.6E(γ): Existence and placement of γ is questionable.
  1583.8E(γ): Multiply placed with undivided intensity. Existence and placement of γ is questionable.
I(γ): Multiply placed with undivided intensity
  1690.0+X  1583.8E(γ): Multiply placed with undivided intensity. Existence and placement of γ is questionable.
I(γ): Multiply placed with undivided intensity

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