ADOPTED LEVELS, GAMMAS for 215Fr

Authors: A.K. Jain, S. Singh, B. Singh, N. Kaur, S. Lakshmai |  Citation: Nucl. Data Sheets 114, 2023 (2013) |  Cutoff date: 23-SEP-2013 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-2216 keV 10S(n)= 6795 keV 11S(p)= 2651 keV 11Q(α)= 9540 keV 7
Reference: 2012WA38

References:
  A  219Ac α decay (11.8 μs)  B  208Pb(11B,4nγ)

General Comments:

215Ac evaluated by α.K. Jain, S. Singh, B. Singh, n. Kaur, S. Lakshami, B. Maheshwari

215Fr identified (1961Gr43) in excitation function measurements in 208Pb(11B,4n)215Fr reaction. 1970Bo13 identified 215Fr as descendent of 223Pa, and estimated its half-life

All γ-ray and excited-state data are from the 208Pb(11B,4nγ) dataset

Levels: The low-lying states of 215Fr result from the coupling of an h9/2 proton to the 0+, 2+, 4+, 6+, and 8+ states of the even-even core (214Rn). The energies of these even-spin states are similar to those of the 9/2, and (11/2,13/2), (15/2,17/2), (21/2,19/2) doublets in 215Fr. The long-range α particle groups emitted from these states in 215Fr are analogous to those emitted from the g.s., 4+, 6+, and 8+ states in 216Ra.

Levels: First level scheme of 215Fr with four excited states was reported by 1982GoZU (also 1983GoZX). 1984De16 extended the level scheme up to 3068 level with 20 gamma rays. α contemporary study by 1984Sc25 produced a level scheme up to 3462 level with 26 gamma rays; the level scheme up to 3068-keV level almost the same as in 1984De16. 1985Dr04 measured polarization asymmetries for several of the gamma rays, establishing definite multipolarities. They reported 21 gamma rays and essentially confirmed the earlier level schemes of 1984De16 and 1984Sc25. In the opinion of the evaluators, further work is needed to define the ordering of the cascades above 2251 level

Gammas: All data are from 208Pb(11B,4nγ).

Q-value: S(2n)=12272 9, S(2p)=7680 8 (2012Wa38)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0AB 9/2- 86 ns 5 
% α = 100
     
   670.34 13  B (13/2)-     670.35 15 
  100
E2
     0.0
9/2-
   699.97 13  B (11/2)-     699.95 15 
  100
M1+E2
     0.0
9/2-
   835.43 14  B (13/2)+ % α = 4.3 15
  135.41 15 
  164.96 15 
  100 4 
   56.8 25 
(E1)
(E1)
   699.97
   670.34
(11/2)-
(13/2)-
  1121.51 17  B (17/2)- % α = 0.9 1
  451.23 15 
  100
E2
   670.34
(13/2)-
  1149.04 14  B (15/2)- % α = 0.9 1
   27.5 2 S
  313.41 15 
  449.11 15 
  478.80 15 
 
   16.7 7 
  100.0 24 
   76 5 
(M1)
E1
E2
M1+E2
  1121.51
   835.43
   699.97
   670.34
(17/2)-
(13/2)+
(11/2)-
(13/2)-
  1440.02 18  B (19/2)- 4 ns 2 
% α = 4.7 4
  290.93 15 
  318.52 15 
  100 3 
   22 3 
E2
M1+E2
  1149.04
  1121.51
(15/2)-
(17/2)-
  1457.36 21  B (21/2)-     335.88 15 
  100
E2
  1121.51
(17/2)-
  1573.10 21  B (23/2)- 3.5 ns 14 
% α = 4.1 4
  115.8 2 
  133.05 15 
    5.3 6 
  100 9 
[M1]
E2
  1457.36
  1440.02
(21/2)-
(19/2)-
  1680.6 3 ? B (25/2-)     107.4 3 
  100
M1(+E2)
  1573.10
(23/2)-
  1813.62 25  B (27/2)- 2.1 ns 14    133.05 15 
  240.53 15 
   41 11 
  100 4 
M1+E2
E2
  1680.6
  1573.10
(25/2-)
(23/2)-
  2015.9 3  B (29/2)+ 4.7 ns 14    202.32 15 
  100
E1
  1813.62
(27/2)-
  2251.3 4  B (33/2)+ 5.3 ns 14    235.39 15 
  100
E2
  2015.9
(29/2)+
  2806.8 4 ? B (35/2)-     555.48 15 
  100
E1
  2251.3
(33/2)+
  2900.4 4 ? B (35/2-)     649.09 15 
  100
D+Q
  2251.3
(33/2)+
  3014.0 5 ? B (37/2-)     113.7 3 
  100
[M1]
  2900.4
(35/2-)
  3068.9 4  B (39/2)- 14.6 ns 14    262.01 15 
  817.53 15 
  100 3 
   34.4 16 
E2
(E3)
  2806.8
  2251.3
(35/2)-
(33/2)+
  3207.5 5  B (41/2-)     138.5 3 
  193.6 2 
   52 10 
  100 20 
[M1]
(E2)
  3068.9
  3014.0
(39/2)-
(37/2-)
  3409.1 4  B (41/2)     340.25 15 
  100
D
  3068.9
(39/2)-
  3417.1 5 ? B (45/2-)     209.6 2 
  100
E2
  3207.5
(41/2-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  3462.3 6  B (47/2+) 22.9 ns 21     45.2 3 
  100
(E1)
  3417.1
(45/2-)

E(level): From a least-squares fit of γ-ray energies

Jπ(level): As proposed in 1985Dr04, 1984Sc25 and 1984De16 based on γ(θ), γ(lin pol), ce, and transition probabilities. Multiple quasi-particle shell model configurations presented here are from 1984Sc25.

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
   670.34 (13/2)-     670.35 15 E2 0.0191α=0.0191, α(K)=0.01387 20, α(L)=0.00394 6, α(M)=0.000984 14, α(N)=0.000258 4, α(O)=5.60×10-5 8, α(P)=8.34E-6 12, α(Q)=3.06E-7 5
   699.97 (11/2)-     699.95 15 M1+E2-3.8 50.0206α=0.0206 10, α(K)=0.0155 9, α(L)=0.00390 13, α(M)=0.00096 3, α(N)=0.000252 8, α(O)=5.51×10-5 18, α(P)=8.3E-6 3, α(Q)=3.41E-7 19
   835.43 (13/2)+ % α = 4.3 15
  135.41 15 (E1) 0.227α=0.227, α(K)=0.179 3, α(L)=0.0366 6, α(M)=0.00876 13, α(N)=0.00227 4, α(O)=0.000488 7, α(P)=7.12×10-5 10, α(Q)=2.80E-6 4
(13/2)+ % α = 4.3 15
  164.96 15 (E1) 0.1402α=0.1402, α(K)=0.1113 16, α(L)=0.0219 3, α(M)=0.00523 8, α(N)=0.001357 20, α(O)=0.000293 5, α(P)=4.34×10-5 7, α(Q)=1.79E-6 3
  1121.51 (17/2)- % α = 0.9 1
  451.23 15 E2 0.0473α=0.0473, α(K)=0.0300 5, α(L)=0.01294 19, α(M)=0.00333 5, α(N)=0.000873 13, α(O)=0.000187 3, α(P)=2.67×10-5 4, α(Q)=6.88E-7 10
  1149.04 (15/2)- % α = 0.9 1
   27.5 2 (M1) 124α=124 4
(15/2)- % α = 0.9 1
  313.41 15 E1 0.031α=0.031, α(K)=0.0251 4, α(L)=0.00450 7, α(M)=0.001067 15, α(N)=0.000277 4, α(O)=6.08×10-5 9, α(P)=9.31E-6 13, α(Q)=4.38E-7 7
(15/2)- % α = 0.9 1
  449.11 15 E2 0.0479α=0.0479, α(K)=0.0302 5, α(L)=0.01314 19, α(M)=0.00338 5, α(N)=0.000887 13, α(O)=0.000190 3, α(P)=2.71×10-5 4, α(Q)=6.95E-7 10
(15/2)- % α = 0.9 1
  478.80 15 M1+E2-3.8 +5-40.050α=0.050 3, α(K)=0.0345 24, α(L)=0.0117 4, α(M)=0.00297 8, α(N)=0.000778 22, α(O)=0.000168 5, α(P)=2.45×10-5 8, α(Q)=7.8E-7 6
  1440.02 (19/2)- 4 ns 2 
% α = 4.7 4
  290.93 15 E2 0.1590B(E2)(W.u.)=0.6 4, α=0.1590, α(K)=0.0746 11, α(L)=0.0625 9, α(M)=0.01653 24, α(N)=0.00434 6, α(O)=0.000914 13, α(P)=0.0001248 18, α(Q)=1.81E-6 3
(19/2)- 4 ns 2 
% α = 4.7 4
  318.52 15 M1+E2+10 +6-20.125B(E2)(W.u.)=0.09 5, B(M1)(W.u.)=3.E-7 +4-3, α=0.125 4, α(K)=0.0654 25, α(L)=0.0446 7, α(M)=0.01171 17, α(N)=0.00307 5, α(O)=0.000650 10, α(P)=8.97E-5 14, α(Q)=1.56E-6 6
  1457.36 (21/2)-     335.88 15 E2 0.1039α=0.1039, α(K)=0.0550 8, α(L)=0.0363 5, α(M)=0.00952 14, α(N)=0.00250 4, α(O)=0.000529 8, α(P)=7.31×10-5 11, α(Q)=1.309E-6 19
  1573.10 (23/2)- 3.5 ns 14 
% α = 4.1 4
  115.8 2 [M1] 9.43B(M1)(W.u.)=5.1×10-5 22, α=9.43, α(K)=7.59 12, α(L)=1.402 21, α(M)=0.334 5, α(N)=0.0876 13, α(O)=0.0196 3, α(P)=0.00314 5, α(Q)=0.000175 3
(23/2)- 3.5 ns 14 
% α = 4.1 4
  133.05 15 E2 2.67B(E2)(W.u.)=12 5, α=2.67, α(K)=0.315 5, α(L)=1.734 25, α(M)=0.469 7, α(N)=0.1230 18, α(O)=0.0256 4, α(P)=0.00332 5, α(Q)=1.310E-5 19
  1680.6 (25/2-)     107.4 3 M1(+E2) 11.66α=11.66 19, α(K)=9.37 15, α(L)=1.74 3, α(M)=0.415 7, α(N)=0.1089 18, α(O)=0.0243 4, α(P)=0.00390 7, α(Q)=0.000218 4
  1813.62 (27/2)- 2.1 ns 14    133.05 15 M1+E2+0.50 +13-185.6B(E2)(W.u.)=1.7 15, B(M1)(W.u.)=0.0004 3, α=5.6 4, α(K)=4.2 5, α(L)=1.10 8, α(M)=0.273 24, α(N)=0.072 7, α(O)=0.0156 13, α(P)=0.00235 13, α(Q)=9.7E-5 11
(27/2)- 2.1 ns 14    240.53 15 E2 0.292B(E2)(W.u.)=1.1 8, α=0.292, α(K)=0.1117 16, α(L)=0.1332 19, α(M)=0.0355 5, α(N)=0.00932 14, α(O)=0.00196 3, α(P)=0.000263 4, α(Q)=2.83E-6 4
  2015.9 (29/2)+ 4.7 ns 14    202.32 15 E1 0.0858B(E1)(W.u.)=4.5E-6 14, α=0.0858, α(K)=0.0686 10, α(L)=0.01305 19, α(M)=0.00311 5, α(N)=0.000807 12, α(O)=0.0001754 25, α(P)=2.63E-5 4, α(Q)=1.136E-6 16
  2251.3 (33/2)+ 5.3 ns 14    235.39 15 E2 0.314B(E2)(W.u.)=1.5 4, α=0.314, α(K)=0.1168 17, α(L)=0.1454 21, α(M)=0.0388 6, α(N)=0.01019 15, α(O)=0.00214 3, α(P)=0.000286 4, α(Q)=2.98E-6 5
  2806.8 (35/2)-     555.48 15 E1 0.00922α=0.00922 13, α(K)=0.00755 11, α(L)=0.001270 18, α(M)=0.000299 5, α(N)=7.80×10-5 11, α(O)=1.724E-5 25, α(P)=2.70E-6 4, α(Q)=1.383E-7 20
  3014.0 (37/2-)     113.7 3 [M1] 9.94α=9.94 16, α(K)=7.99 13, α(L)=1.478 24, α(M)=0.352 6, α(N)=0.0924 15, α(O)=0.0206 4, α(P)=0.00331 6, α(Q)=0.000185 3
  3068.9 (39/2)- 14.6 ns 14    262.01 15 E2 0.220B(E2)(W.u.)=0.26 3, α=0.220, α(K)=0.0931 13, α(L)=0.0941 14, α(M)=0.0250 4, α(N)=0.00656 10, α(O)=0.001380 20, α(P)=0.000187 3, α(Q)=2.31E-6 4
(39/2)- 14.6 ns 14    817.53 15 (E3) 0.0331B(E3)(W.u.)=27 3, α=0.0331, α(K)=0.0217 3, α(L)=0.00846 12, α(M)=0.00217 3, α(N)=0.000572 8, α(O)=0.0001238 18, α(P)=1.83E-5 3, α(Q)=5.92E-7 9
  3207.5 (41/2-)     138.5 3 [M1] 5.67α=5.67, α(K)=4.56 7, α(L)=0.838 13, α(M)=0.200 3, α(N)=0.0524 8, α(O)=0.01171 18, α(P)=0.00188 3, α(Q)=0.0001049 16
(41/2-)     193.6 2 (E2) 0.622α=0.622, α(K)=0.1740 25, α(L)=0.330 5, α(M)=0.0887 13, α(N)=0.0233 4, α(O)=0.00486 8, α(P)=0.000643 10, α(Q)=4.81×10-6 7
E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
  3417.1 (45/2-)     209.6 2 E2 0.468α=0.468, α(K)=0.1485 21, α(L)=0.236 4, α(M)=0.0632 10, α(N)=0.01657 25, α(O)=0.00347 5, α(P)=0.000461 7, α(Q)=3.95×10-6 6
  3462.3 (47/2+) 22.9 ns 21     45.2 3 (E1) 0.894B(E1)(W.u.)=4.7E-5 5, α=0.894 21, α(L)=0.676 16, α(M)=0.165 4, α(N)=0.0423 10, α(O)=0.00869 20, α(P)=0.001128 25, α(Q)=3.15E-5 7

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.09/2- 86 ns 5 
% α = 100
No ε decay. Evaluators calculated %ε+%β+=1.0×10-8 for logft=5.0. %ε+%β+<1.0×10-8, theory (1973Ta30).
E(level): No ε decay. Evaluators calculated %ε+%β+=1.0×10-8 for logft=5.0. %ε+%β+<1.0×10-8, theory (1973Ta30).
  1680.6(25/2-)   E(level): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069-keV level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established. The level energies for the intermediate levels can be different for alternate orderings.
  2806.8(35/2)-   E(level): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069-keV level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established. The level energies for the intermediate levels can be different for alternate orderings.
  2900.4(35/2-)   E(level): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069-keV level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established. The level energies for the intermediate levels can be different for alternate orderings.
  3014.0(37/2-)   E(level): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069-keV level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established. The level energies for the intermediate levels can be different for alternate orderings.
  3417.1(45/2-)   E(level): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069-keV level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established. The level energies for the intermediate levels can be different for alternate orderings.
  3462.3(47/2+) 22.9 ns 21  Theoretical g-factor=0.61 (1984Sc25).

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Additional Gamma Comments:

E(level)E(gamma)Comments
  1149.04    27.5E(γ): from level-energy difference.
   313.41I(γ): from 1984Sc25. Others: 24 4 (1984De16), 45.4 17 (1985Dr04); the latter in severe disagreement
   478.80I(γ): other: 100 12 (1984De16) is in disagreement
  1440.02   318.52I(γ): unweighted average of values in 1984Sc25 and 1985Dr04
  1573.10   133.05E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
  1680.6   107.4E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
  1813.62   133.05E(γ): Multiply placed with intensity suitably divided. The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
I(γ): Multiply placed with intensity suitably divided
  2806.8   555.48E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
  2900.4   649.09E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
  3014.0   113.7E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
  3068.9   262.01E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
  3207.5   193.6E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
  3417.1   209.6E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.
  3462.3    45.2E(γ): The orderings of 133-107 cascade from 1813 level; 262-55 cascade from 3069 level; 194-114-649 cascade from 3207 level; and 45-210 cascade from 3462 level are not established.

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