ADOPTED LEVELS, GAMMAS for 50Sc

Authors: Jun Chen and Balraj Singh |  Citation: Nucl. Data Sheets 157, 1 (2019) |  Cutoff date: 15-Apr-2019 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=6884 keV 15S(n)= 6057 keV 15S(p)= 10537 keV 15Q(α)= -11558 keV 15
Reference: 2017WA10

References:
  A  50Ca β- decay (13.45 S)  B  50Sc IT decay (0.35 S)
  C  48Ca(3He,p)  D  48Ca(α,d)
  E  48Ca(16O,14N)  F  50Ti(t,3He)

General Comments:

Theory references: consult the NSR database (www.nndc.bnl.gov/nsr/) for 20 references dealing with various aspects of nuclear structure.

α tentative 22-min isomeric activity in 50Sc proposed by 1959Po64 was not confirmed in later studies.

Q-value: S(2n)=16186 16, S(2p)=26841 15 (2017Wa10)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
      0.0ABCDEF 5+ 102.5 s 5 
% β- = 100
     
    256.895 10 ABCD F 2+ 0.35 s 4 
% IT = 99.5 5
% β- < 1.0
   256.894 10 
  100
(M3)
      0.0
5+
    328.447 12 A CDEF 3+ < 600 ps     71.552 5 
   328
  100
    0.84 9 
M1(+E2)
[E2]
    256.895
      0.0
2+
5+
    757 6   CDEF (4)+        
   1847.772 20 A CDEF 1+ < 2 ns   1519.30 2 
  1590.85 3 
  100.0 13 
   60.7 11 
[E2]

    328.447
    256.895
3+
2+
   2225 5   CD F 2+,3+        
   2326 6   CD F (3)+        
   2527 10      F (1)        
   2614 10      F (1+)        
   3028 15      F        
   3089 5   CD F (0)+        
   3259 6   CD F 1+,2+,3+        
   3287 5   CD F 1+,2+,3+        
   3355 15    D F        
   3385 15   CD F        
   3500 20   C  F        
   3556 15      F        
   3611 15   C  F        
   3681 5   C  F 1+        
   3731 10 ?  C           
   3927 13   CD   1+        
   3950 20   C           
   4135 20   C    1+,2+,3+        
   4232 20   CD   1+,2+,3+        
   4311 13   CD   1+,2+,3+        
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
   4456 13   CD   1+,2+,3+        
   4530 20 ?  C           
   4590 20 ?  C           
   4638 6   C    1+        
   4660 20   C           
   4729 20 ?  C           
   4820 20   C    1+,2+,3+        
   4876 6   C    1+        
   4976 6   C    1+        
   5072 8   C    1+,2+,3+        
   5135 20   C           
   5195 20   C           
   5265 20   CD          
   5338 13   CD   1+,2+,3+        
   5430 12   C    1+,2+,3+        
   5540 20   C           
   5600 13   C    1+,2+,3+        
   5699 17   C    (0+,1+)        
   5810 20   C    (3+)        
   5853 30   C    1+,2+,3+        
   6014 30   CD   3+,4+,5+        
   6118 30   CD   1+,2+,3+        
   6285 30   C    1+,2+,3+        
   6447 30   C           
   6618 30   C           
      8.25E3 3    D          
  11195 20   C    (0+)        

E(level): From (3He,p), except for those states connected by gammas, as indicated in XREF, or the 3388 state where E(level) is from (t,3He)

Jπ(level): From L-transfers in 48Ca(3He,p), 48Ca(α,d) and 50Ti(t,3He), as well as comparison of experimental σ(θ) in (t,3He) with coupled-channel Born approximation (CCBA) calculations. Exceptions are noted. In all the particle-transfer experiments, target Jπ is 0+ for the ground states, which imply Jπ values as: 0+,1+ for L=1; 0-,1-,2- for L=1; 1+,2+,3+ for L=2; 3+,4+,5+ for L=4; 5+,6+,7+ for L=6; 1+ for L=0+2; 3+ for L=2+4; and 5+ for L=4+6. No L=3 cases seem to have been reported in any of these experiments.

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
    256.895 2+ 0.35 s 4 
% IT = 99.5 5
% β- < 1.0
   256.894 10 (M3) 0.0356B(M3)(W.u.)=13.4 16, α=0.0356
    328.447 3+ < 600 ps     71.552 5 M1(+E2)+0.015 250.0386B(M1)(W.u.)>0.096, α=0.0386 17
3+ < 600 ps    328[E2] 0.00325B(E2)(W.u.)>0.16, α=0.00325
   1847.772 1+ < 2 ns   1519.30 2 [E2] B(E2)(W.u.)>0.002

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.05+ 102.5 s 5 
% β- = 100
Measured strong absorption radii=1.43 fm2 10 at 40.57 MeV/nucleon 50Sc beam, 1.39 fm2 8 at 90 MeV/nucleon (1999Ai02), 1.07 fm2 7 at 62.2 MeV/nucleon (1997Li15).
E(level): Measured strong absorption radii=1.43 fm2 10 at 40.57 MeV/nucleon 50Sc beam, 1.39 fm2 8 at 90 MeV/nucleon (1999Ai02), 1.07 fm2 7 at 62.2 MeV/nucleon (1997Li15).
    256.8952+ 0.35 s 4 
% IT = 99.5 5
% β- < 1.0
Upper limit of %β- estimated in 2017Ga25 in 50Ca β- decay study from examining γ-intensities in 50Sc and 50Ti.
    328.4473+ < 600 ps XREF: C(338).
   2527(1)   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc.
   2614(1+)   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc.
   3028   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc.
   3089(0)+   XREF: d(?)F(?).
   32591+,2+,3+   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc. Unresolved groups of states observed at 3250, 3300, 3475, 3556, and 3598 in (t,3He).
   32871+,2+,3+   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc. Unresolved groups of states observed at 3250, 3300, 3475, 3556, and 3598 in (t,3He).
   3355   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc.
   3385   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc.
   3500   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc. Unresolved groups of states observed at 3250, 3300, 3475, 3556, and 3598 in (t,3He).
   3556   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc. Unresolved groups of states observed at 3250, 3300, 3475, 3556, and 3598 in (t,3He).
   3611   E(level): Levels below 2330 keV in (t,3He) were assigned by 1985Aj03 on the basis of the intensities and previously known levels. According to the authors, positive assignments of states to 50Sc is difficult above the 2327 group, since 48Ti was also present in the target material and some of these states could belong to 48Sc. Unresolved groups of states observed at 3250, 3300, 3475, 3556, and 3598 in (t,3He).
   36811+   XREF: F(?).

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Additional Gamma Comments:

E(level)E(gamma)Comments
    256.895    256.894M(γ): B(M3)(W.u.) exceeds somewhat RUL
    328.447     71.552M(γ): from α(exp) deduced from intensity balance consideration and γγ(θ) in β- decay (2017Ga25)

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