ADOPTED LEVELS, GAMMAS for 160Sm

Author: N. Nica |  Citation: Nucl. Data Sheets 176, 1 (2021) |  Cutoff date: 1-May-2021 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=3260.3 keV 22S(n)= 6097 keV 6S(p)= 10968 keV 10Q(α)= -2456.0 keV 24
Reference: 2021WA16

References:
  A  160Sm IT decay (1.8 μs)  B  252Cf SF decay

General Comments:

Production: produced as a fission product from 235U(n,F) (1986Ma12) 252Cf SF decay (1987Gr12), and 9Be(238U,F) (2016Pa01). All studies utilized on-line isotope separation.

The data of 160Sm are primarily from 2016Pa01 (160Sm IT decay), completed with data from 2009Si21 (252Cf SF decay)

1997Ha64 discuss the yrast (g.s.) band in 160Sm, together with those in a number of other doubly even nuclides in this mass region, as being examples of identical or shifted-identical bands. See, also, 1997Do20, 1998HaZY and 2001Jo10. All of these studies involve many of the same authors.

Q-value: S(2n)=11124 5, S(2p)=20976.0 24 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0AB 0+ 9.6 s 3 
% β- = 100
     
    70.80 20 AB 2+       70.70 5 
  100
[E2]
     0.0
0+
   233.1 3 AB 4+      162.15 5 
  100
[E2]
    70.80
2+
   483.4 4 AB 6+      250.00 5 
  100
[E2]
   233.1
4+
   816.9 4  B 8+      333.25 5 
  100
[E2]
   483.4
6+
  1227.8 5  B (10+)      410.9 2 
  100
[E2]
   816.9
8+
  1361.1 5 AB (5-) 120 ns 46     877.8 4 
  1127.9 4 
   24 5 
  100
[E1]
[E1]
   483.4
   233.1
6+
4+
  1468.6 5 A  (6-)      107.5 3 
  100
[M1]
  1361.1
(5-)
  1602.2 6 A  (7-)      133.5 3 
  100
[M1]
  1468.6
(6-)
  1710.0 5  B (12+)      482.2 2 
  100
[E2]
  1227.8
(10+)
  1754.8 6 A  (8-)      152.3 4 
   286.4 4 
  100 20 
   27 7 
[M1]
[E2]
  1602.2
  1468.6
(7-)
(6-)
  1926.3 7 A  (9-)      171.4 4 
   324.1 4 
  100 21 
   83 21 
[M1]
[E2]
  1754.8
  1602.2
(8-)
(7-)
  2116.7 7 A  (10-)      190.4 4 
   362.0 3 
   86 17 
  100 17 
[M1]
[E2]
  1926.3
  1754.8
(9-)
(8-)
  2258.9 6  B (14+)      548.9 2 
  100
[E2]
  1710.0
(12+)
  2325.8 7 A  (11-)      209.1 5 
   399.5 5 
   46 31 
  100 31 
[M1]
[E2]
  2116.7
  1926.3
(10-)
(9-)
  2757.9 7 A  (11+) 1.8 µs 4     432.1 4 
   641.1 3 
   33 8 
  100 14 
[E1]
[E1]
  2325.8
  2116.7
(11-)
(10-)

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

Jπ(level): For positive parity states: members of the 0+ g.s. band, based on energy-spacing considerations (from 1995Zh15 and 1997Do20, SF decay). For negative parity states: (5-) for the 120 ns isomer established from systematics and theoretical configurations; the upper states before the 1.8 μs isomer: theory, systematics, and members of strongly-coupled rotational band. (11+) for the 1.8 μs isomer: based on theory and systematics. For states in 160Sm IT decay 2009Si21 tacitly implied very tentatively-deduced multipolatiries

M(γ): 2016Pa01 (160Sm IT decay) did very tentative estimates of multipolaties from the intensity balances through the levels and the decay patterns only (no directly measured electron conversion coefficients and γ-ray angular correlations were performed). Although 2016Pa01 list no explicit multipolarities they were tacitly figured into the Jπ assignments

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - GROUND-STATE ROTATIONAL band.
     0.0 0+ 9.6 s 3 
% β- = 100
     
    70.80 20  2+       70.70 5 
  100
[E2]
     0.0
0+
   233.1 3  4+      162.15 5 
  100
[E2]
    70.80
2+
   483.4 4  6+      250.00 5 
  100
[E2]
   233.1
4+
   816.9 4  8+      333.25 5 
  100
[E2]
   483.4
6+
  1227.8 5  (10+)      410.9 2 
  100
[E2]
   816.9
8+
  1710.0 5  (12+)      482.2 2 
  100
[E2]
  1227.8
(10+)
  2258.9 6  (14+)      548.9 2 
  100
[E2]
  1710.0
(12+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Strongly-coupled rotational band based on (6-). The assignment
  1468.6 5  (6-)        
  1602.2 6  (7-)      133.5 3 
  100
[M1]
  1468.6
(6-)
  1754.8 6  (8-)      152.3 4 
   286.4 4 
  100 20 
   27 7 
[M1]
[E2]
  1602.2
  1468.6
(7-)
(6-)
  1926.3 7  (9-)      171.4 4 
   324.1 4 
  100 21 
   83 21 
[M1]
[E2]
  1754.8
  1602.2
(8-)
(7-)
  2116.7 7  (10-)      190.4 4 
   362.0 3 
   86 17 
  100 17 
[M1]
[E2]
  1926.3
  1754.8
(9-)
(8-)
  2325.8 7  (11-)      209.1 5 
   399.5 5 
   46 31 
  100 31 
[M1]
[E2]
  2116.7
  1926.3
(10-)
(9-)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
    70.80 2+       70.70 5 [E2]8.53α=8.53, α(K)=2.77 4, α(L)=4.46 7, α(M)=1.040 15, α(N)=0.227 4, α(O)=0.0281 4, α(P)=0.0001171 17
   233.1 4+      162.15 5 [E2]0.425α=0.425, α(K)=0.286 4, α(L)=0.1079 16, α(M)=0.0246 4, α(N)=0.00543 8, α(O)=0.000708 10, α(P)=1.353×10-5 19
   483.4 6+      250.00 5 [E2]0.1001α=0.1001, α(K)=0.0757 11, α(L)=0.0191 3, α(M)=0.00428 6, α(N)=0.000951 14, α(O)=0.0001287 18, α(P)=3.93×10-6 6
   816.9 8+      333.25 5 [E2]0.0407α=0.0407, α(K)=0.0322 5, α(L)=0.00670 10, α(M)=0.001487 21, α(N)=0.000331 5, α(O)=4.60×10-5 7, α(P)=1.760E-6 25
  1227.8 (10+)      410.9 2 [E2]0.0220α=0.0220, α(K)=0.0178 3, α(L)=0.00332 5, α(M)=0.000730 11, α(N)=0.0001633 23, α(O)=2.31×10-5 4, α(P)=1.002E-6 14
  1361.1 (5-) 120 ns 46     877.8 4 [E1]1.32×10-3B(E1)(W.u.)=5.5E-10 +35-17, α=1.32E-3, α(K)=0.001137 16, α(L)=0.0001468 21, α(M)=3.12E-5 5, α(N)=7.06E-6 10, α(O)=1.055E-6 15, α(P)=6.57E-8 10
(5-) 120 ns 46    1127.9 4 [E1]8.31×10-4B(E1)(W.u.)=1.1E-9 +7-3, α=8.31E-4, α(K)=0.000711 10, α(L)=9.09E-5 13, α(M)=1.93E-5 3, α(N)=4.37E-6 7, α(O)=6.55E-7 10, α(P)=4.12E-8 6
  1468.6 (6-)      107.5 3 [M1]1.374α=1.374 23, α(K)=1.165 19, α(L)=0.165 3, α(M)=0.0354 6, α(N)=0.00804 13, α(O)=0.001204 20, α(P)=7.43×10-5 12
  1602.2 (7-)      133.5 3 [M1]0.743α=0.743 12, α(K)=0.630 10, α(L)=0.0890 14, α(M)=0.0191 3, α(N)=0.00433 7, α(O)=0.000649 10, α(P)=4.02×10-5 7
  1710.0 (12+)      482.2 2 [E2]0.01413α=0.01413, α(K)=0.01157 17, α(L)=0.00201 3, α(M)=0.000440 7, α(N)=9.86×10-5 14, α(O)=1.408E-5 20, α(P)=6.64E-7 10
  1754.8 (8-)      152.3 4 [M1]0.513α=0.513 9, α(K)=0.435 7, α(L)=0.0613 10, α(M)=0.01317 21, α(N)=0.00299 5, α(O)=0.000448 7, α(P)=2.77×10-5 5
(8-)      286.4 4 [E2]0.0650α=0.0650, α(K)=0.0503 8, α(L)=0.01150 18, α(M)=0.00257 4, α(N)=0.000571 9, α(O)=7.82×10-5 12, α(P)=2.68E-6 4
  1926.3 (9-)      171.4 4 [M1]0.369α=0.369, α(K)=0.313 5, α(L)=0.0441 7, α(M)=0.00946 15, α(N)=0.00214 4, α(O)=0.000322 5, α(P)=1.99×10-5 3
(9-)      324.1 4 [E2]0.0443α=0.0443, α(K)=0.0349 5, α(L)=0.00738 11, α(M)=0.001640 24, α(N)=0.000366 6, α(O)=5.06×10-5 8, α(P)=1.90E-6 3
  2116.7 (10-)      190.4 4 [M1]0.276α=0.276, α(K)=0.234 4, α(L)=0.0329 5, α(M)=0.00706 11, α(N)=0.001601 25, α(O)=0.000240 4, α(P)=1.491×10-5 23
(10-)      362.0 3 [E2]0.0318α=0.0318, α(K)=0.0254 4, α(L)=0.00504 8, α(M)=0.001115 16, α(N)=0.000249 4, α(O)=3.48×10-5 5, α(P)=1.405E-6 20
  2258.9 (14+)      548.9 2 [E2]0.01004α=0.01004, α(K)=0.00830 12, α(L)=0.001370 20, α(M)=0.000299 5, α(N)=6.71×10-5 10, α(O)=9.66E-6 14, α(P)=4.81E-7 7
  2325.8 (11-)      209.1 5 [M1]0.214α=0.214 4, α(K)=0.181 3, α(L)=0.0254 4, α(M)=0.00545 9, α(N)=0.001235 20, α(O)=0.000185 3, α(P)=1.152×10-5 18
(11-)      399.5 5 [E2]0.0239α=0.0239, α(K)=0.0192 3, α(L)=0.00363 6, α(M)=0.000801 12, α(N)=0.000179 3, α(O)=2.52×10-5 4, α(P)=1.079E-6 16
  2757.9 (11+) 1.8 µs 4     432.1 4 [E1]0.00604B(E1)(W.u.)=3.9E-10 +14-11, α=0.00604, α(K)=0.00516 8, α(L)=0.000689 10, α(M)=0.0001469 21, α(N)=3.31E-5 5, α(O)=4.90E-6 7, α(P)=2.91E-7 5
(11+) 1.8 µs 4     641.1 3 [E1]0.00250B(E1)(W.u.)=3.6E-10 +11-7, α=0.00250, α(K)=0.00215 3, α(L)=0.000281 4, α(M)=5.98E-5 9, α(N)=1.351E-5 19, α(O)=2.01E-6 3, α(P)=1.229E-7 18

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 9.6 s 3 
% β- = 100
E(level): GROUND-STATE ROTATIONAL band.
    70.802+   E(level): GROUND-STATE ROTATIONAL band.
   233.14+   E(level): GROUND-STATE ROTATIONAL band.
   483.46+   E(level): GROUND-STATE ROTATIONAL band.
   816.98+   E(level): GROUND-STATE ROTATIONAL band.
  1227.8(10+)   E(level): GROUND-STATE ROTATIONAL band.
  1361.1(5-) 120 ns 46  Two-quasiparticle configuration=π5/2-[532]~#π5/2+[413]; according to blocked-BCS calculations (2016Pa01) this configuration is preferred instead of ν5/2[642]~#ν5/2[523] (2009Si21, 252Cf SF decay).
  1468.6(6-)   Two-quasiparticle configuration=ν5/2-[523]~#ν7/2+[633].
E(level): Strongly-coupled rotational band based on (6-). The assignment.
  1602.2(7-)   E(level): Strongly-coupled rotational band based on (6-). The assignment.
  1710.0(12+)   E(level): GROUND-STATE ROTATIONAL band.
  1754.8(8-)   E(level): Strongly-coupled rotational band based on (6-). The assignment.
  1926.3(9-)   E(level): Strongly-coupled rotational band based on (6-). The assignment.
  2116.7(10-)   E(level): Strongly-coupled rotational band based on (6-). The assignment.
  2258.9(14+)   E(level): GROUND-STATE ROTATIONAL band.
  2325.8(11-)   E(level): Strongly-coupled rotational band based on (6-). The assignment.
  2757.9(11+) 1.8 µs 4  Four-quasiparticle configuration=ν5/2-[523]~#ν7/2+[633].

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