ADOPTED LEVELS, GAMMAS for 151Ce

Author: Balraj Singh |  Citation: Nucl. Data Sheets 110, 1 (2009) |  Cutoff date: 20-Nov-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=5555 keV 21S(n)= 4450 keV 21S(p)= 1.24×104 keV 4Q(α)= -3.39×103 keV 3
S(2n)= 10698 keV 21S(2p)= 2.27×104 keV 4
Reference: 2017WA10

References:
  A  248Cm SF decay 

General Comments:

151Ce produced by 2006Ko25 from thermal neutron-induced fission of 235U (93% enriched) followed by on-line mass separation at KURISOL facility in Kyoto.

Mass separated fission product from spontaneous fission of 252Cf (1969WiZX). Atomic number is securely known from (x ray)γ coin but mass assignment allows 149, 150, 151. Subsequent work identified 4.0-s 150Ce and 5.2-s 149Ce, thus establishing 151Ce by elimination, none of the γ rays assigned to the decay of 151Ce by 1969WiZX has been confirmed by 2006Ko25. Thus the activity observed by 1969WiZX does not belong to the decay of the g.s. of 151Ce. It is possible that the 1.02-s activity is connected with an isomer of 151Ce.

Mass measurement (Penning-trap method): 2006Sa56 (also 2004Cl07)









E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)Final Levels
     0.0A (5/2+) 1.76 s 6 
% β- = 100
    
   0+X?  1.02 s 6 
% β- = ?
    
    75.3 2 A (7/2+)      75.2
 
     0.0
(5/2+)
   166.0 2 A (9/2+)      90.6
  166.1
  100 4 
   49 4 
    75.3
     0.0
(7/2+)
(5/2+)
   285.8 3 A (11/2+)     119.8
  210.5
  100 8 
   92 8 
   166.0
    75.3
(9/2+)
(7/2+)
   409.7 3 A (13/2+)     123.8
  243.8
   43 3 
  100 3 
   285.8
   166.0
(11/2+)
(9/2+)
   573.6 4 A (15/2+)     163.9
  287.7
   33 5 
  100 5 
   409.7
   285.8
(13/2+)
(11/2+)
   724.8 4 A (17/2+)     151.3
  315.1
   35 3 
  100 3 
   573.6
   409.7
(15/2+)
(13/2+)
   930.5 4 A (19/2+)     205.8
  357.0
   35 7 
  100 7 
   724.8
   573.6
(17/2+)
(15/2+)
  1104.6 5 A (21/2+)     174.2
  379.7
 
 
   930.5
   724.8
(19/2+)
(17/2+)
  1348.8 5 A (23/2+)     418.3
 
   930.5
(19/2+)
  1543.2 6 A (25/2+)     438.6
 
  1104.6
(21/2+)
  1823.4 6 A (27/2+)     474.6
 
  1348.8
(23/2+)
  2036.6 6 A (29/2+)     493.4
 
  1543.2
(25/2+)
  2581.8 7 A (33/2+)     545.2
 
  2036.6
(29/2+)

E(level): From least-squares fit to Eγ’s, assuming Δ(Eγ)=0.3 keV for each γ ray

Jπ(level): Possible assignment to 5/2[642] band (1997Ho11). Since 75.2γ and 90.6γ are not E1, the band is an alternating-parity band.

Back to top

Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 1 - ν5/2[642] band (?). Tentative assignment, the band shows
    75.3 2  (7/2+)       
   166.0 2  (9/2+)       
   285.8 3  (11/2+)     119.8
  210.5
  100 8 
   92 8 
   166.0
    75.3
(9/2+)
(7/2+)
   409.7 3  (13/2+)     123.8
  243.8
   43 3 
  100 3 
   285.8
   166.0
(11/2+)
(9/2+)
   573.6 4  (15/2+)     163.9
  287.7
   33 5 
  100 5 
   409.7
   285.8
(13/2+)
(11/2+)
   724.8 4  (17/2+)     151.3
  315.1
   35 3 
  100 3 
   573.6
   409.7
(15/2+)
(13/2+)
   930.5 4  (19/2+)     205.8
  357.0
   35 7 
  100 7 
   724.8
   573.6
(17/2+)
(15/2+)
  1104.6 5  (21/2+)     174.2
  379.7
 
 
   930.5
   724.8
(19/2+)
(17/2+)
  1348.8 5  (23/2+)     418.3
 
   930.5
(19/2+)
  1543.2 6  (25/2+)     438.6
 
  1104.6
(21/2+)
  1823.4 6  (27/2+)     474.6
 
  1348.8
(23/2+)
  2036.6 6  (29/2+)     493.4
 
  1543.2
(25/2+)
  2581.8 7  (33/2+)     545.2
 
  2036.6
(29/2+)

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    75.3(7/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
   166.0(9/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
   285.8(11/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
   409.7(13/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
   573.6(15/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
   724.8(17/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
   930.5(19/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
  1104.6(21/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
  1348.8(23/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
  1543.2(25/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
  1823.4(27/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
  2036.6(29/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.
  2581.8(33/2+)   E(level): ν5/2[642] band (?). Tentative assignment, the band shows.

Back to top