ADOPTED LEVELS, GAMMAS for 209Ra

Authors: J. Chen and F.G. Kondev |  Citation: Nucl. Data Sheets 126, 373 (2015) |  Cutoff date: 30-Sep-2013 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-6990 keV 70S(n)= 7930 keV 50S(p)= 2770 keV 50Q(α)= 7143.0 keV 27
Reference: 2012WA38

References:
  A  213Th α decay  B  174Yb(40Ar,5nγ)
  C  184W(30Si,5nγ) 








E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABC 5/2- 4.8 s 2 
% α ≈ 100
     
   644.0 5  BC 9/2-     644.0 5 
  100
E2
     0.0
5/2-
   882.4 7  BC 13/2+ 117 µs 5    238.4 5 
  100
M2
   644.0
9/2-
  1014.8 7   C (11/2-)     370.8 5 
  100
(M1)
   644.0
9/2-
  1409.3 7   C (13/2-)     765.3 5 
  100
(E2)
   644.0
9/2-
  1450.9 9   C (17/2+)     568.5 5 
  100
(E2)
   882.4
13/2+
  1888.1 10   C (21/2+)     437.2 5 
  100
(E2)
  1450.9
(17/2+)
  2223.7 12   C (25/2+)     335.6 5 
  100
(E2)
  1888.1
(21/2+)
  2452.8 13 ?  C (27/2+)     229.1 5 
  100
(M1)
  2223.7
(25/2+)
  2760 15 ?  C (29/2+)     306?
 
(M1)
  2452.8
(27/2+)

E(level): From a least-squares fit to Eγ.

Jπ(level): From 2004Re04 in 184W(30Si,5nγ), based on the deduced γ-ray transition multipolarities and systematics arguments, unless otherwise stated

M(γ): From 2004Re04 in 184W(30Si,5nγ), based on the measured γ-ray anisotropies (d=M1 and Q=E2 were assumed), unless otherwise stated

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   644.0 9/2-     644.0 5 E20.0218α=0.0218, α(K)=0.01553 22, α(L)=0.00471 7, α(M)=0.001187 17, α(N)=0.000313 5, α(O)=6.94×10-5 10, α(P)=1.130E-5 16, α(Q)=5.51E-7 8, α(N+)=0.000394 6
   882.4 13/2+ 117 µs 5    238.4 5 M25.38B(M2)(W.u.)=0.00153 7, α=5.38, α(K)=3.81 6, α(L)=1.164 17, α(M)=0.298 5, α(N)=0.0796 12, α(O)=0.0181 3, α(P)=0.00308 5, α(Q)=0.000221 3, α(N+)=0.1010 15
  1014.8 (11/2-)     370.8 5 (M1)0.397α=0.397, α(K)=0.320 5, α(L)=0.0585 9, α(M)=0.01395 21, α(N)=0.00368 6, α(O)=0.000839 13, α(P)=0.0001463 22, α(Q)=1.147×10-5 17, α(N+)=0.00467 7
  1409.3 (13/2-)     765.3 5 (E2)0.01525α=0.01525, α(K)=0.01130 16, α(L)=0.00297 5, α(M)=0.000739 11, α(N)=0.000195 3, α(O)=4.34×10-5 7, α(P)=7.17E-6 11, α(Q)=3.93E-7 6, α(N+)=0.000246 4
  1450.9 (17/2+)     568.5 5 (E2)0.0288α=0.0288, α(K)=0.0197 3, α(L)=0.00677 10, α(M)=0.001722 25, α(N)=0.000454 7, α(O)=0.0001003 15, α(P)=1.615×10-5 23, α(Q)=7.10E-7 10, α(N+)=0.000571 9
  1888.1 (21/2+)     437.2 5 (E2)0.0537α=0.0537, α(K)=0.0329 5, α(L)=0.01549 23, α(M)=0.00402 6, α(N)=0.001061 16, α(O)=0.000232 4, α(P)=3.65×10-5 6, α(Q)=1.226E-6 18, α(N+)=0.001331 20
  2223.7 (25/2+)     335.6 5 (E2)0.1093α=0.1093, α(K)=0.0562 8, α(L)=0.0393 6, α(M)=0.01038 16, α(N)=0.00274 5, α(O)=0.000594 9, α(P)=9.13×10-5 14, α(Q)=2.19E-6 4, α(N+)=0.00343 6
  2452.8 (27/2+)     229.1 5 (M1)1.496α=1.496 23, α(K)=1.203 19, α(L)=0.222 4, α(M)=0.0530 9, α(N)=0.01398 22, α(O)=0.00319 5, α(P)=0.000556 9, α(Q)=4.36×10-5 7, α(N+)=0.0178 3
  2760 (29/2+)     306(M1)0.671α=0.671, α(K)=0.541 8, α(L)=0.0992 14, α(M)=0.0237 4, α(N)=0.00624 9, α(O)=0.001424 20, α(P)=0.000248 4, α(Q)=1.95×10-5 3, α(N+)=0.00793 12

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.05/2- 4.8 s 2 
% α ≈ 100
Q=+0.39 4, μ=+0.852 16
Eα=7008 keV 5 (1967Va22), 7003 keV 10 (2003He06), and 7005 keV 4 (2008Ha12).
E(level): Eα=7008 keV 5 (1967Va22), 7003 keV 10 (2003He06), and 7005 keV 4 (2008Ha12).
  1014.8(11/2-)   E(level): Fed from a long-lived (a few μs or longer) isomeric state, since 378.8γ, 643.6γ and 765.3γ were observed at the mass separator focal plane in 184W(30Si,5nγ) (2004Re04).
  1409.3(13/2-)   E(level): Fed from a long-lived (a few μs or longer) isomeric state, since 378.8γ, 643.6γ and 765.3γ were observed at the mass separator focal plane in 184W(30Si,5nγ) (2004Re04).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   644.0   644.0E(γ): weighted average of 643.6 keV 5 from 184W(30Si,5nγ) and 644.4 keV 5 from 174Yb(40Ar,5nγ).
M(γ): 209Ra cg M; α(K)exp<0.034 and K/L>3 in 174Yb(40Ar,5nγ) (2008Ha12) are consistent with E1 or E2, but E1 is ruled out, since the placement in the level scheme requires Mult.=E2; γ-ray anisotropy measurements in 184W(30Si,5nγ) (2004Re04) suggest also Mult.=E2
   882.4   238.4M(γ): from α(K)exp=4.0 5 in 174Yb(40Ar,5nγ) (2008Ha12)
  1014.8   370.8E(γ): Observed at the focal plane and, therefore, fed from an isomeric state with a half-life of a few μs or longer in 184W(30Si,5nγ) (2004Re04) (not placed in the level scheme).
  1409.3   765.3E(γ): Observed at the focal plane and, therefore, fed from an isomeric state with a half-life of a few μs or longer in 184W(30Si,5nγ) (2004Re04) (not placed in the level scheme).

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