ADOPTED LEVELS, GAMMAS for 77Sr

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-SEP-2020 

Authors: Balraj Singh, Ninel Nica |  Citation: Nucl. Data Sheets 113, 1115 (2012) |  Cutoff date: 30-Mar-2012 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-11370 keV SYS(n)= 11630 keV 40S(p)= 4613 keV 8Q(α)= -3677 keV 10
Reference: 2017WA10

References:
  A  77Y ε decay (57 MS)  B  40Ca(40Ca,2pnγ)

General Comments:

Identification and production of 77Sr: 1976Ha29 (Chalk River)

Mass measurements (Penning trap): 2005Si34 (also 2004He32)

Hyperfine measurements (LASER spectroscopy): 1992Li11, 1992Li29

Theoretical calculations: consult the NSR database at www.nndc.bnl.gov for six primary theory references dealing with nuclear structure calculations, and half-lives in radioactive decays.

Q-value: Estimated uncertainty=200 keV for Q(β-) (2017Wa10)

Q-value: S(2n)=27330 220, S(2p)=8058 11, Q(εp)=3921 9 (2017Wa10)









E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)Final Levels
      0.0AB 5/2(+) 9.0 s 2 
% ε = 100
% εp = 0.08 3
    
    186.0 7  B (7/2+)      186
  100
      0.0
5/2(+)
    418.2 7  B (9/2+)      232
   418
 
 
    186.0
      0.0
(7/2+)
5/2(+)
    612.8 8  B (3/2-)      613
 
      0.0
5/2(+)
    725.9 9  B (11/2+)      308
   540
 
 
    418.2
    186.0
(9/2+)
(7/2+)
    780.8 9  B (5/2-)      168
   595
 
 
    612.8
    186.0
(3/2-)
(7/2+)
   1010.6 9  B (7/2-)      230
   398
   592
 
 
 
    780.8
    612.8
    418.2
(5/2-)
(3/2-)
(9/2+)
   1051.7 10  B (13/2+)      326
   633
 
 
    725.9
    418.2
(11/2+)
(9/2+)
   1289.9 10  B (9/2-)      279
   509
 
 
   1010.6
    780.8
(7/2-)
(5/2-)
   1480.7 11  B (15/2+)      429
   755
 
 
   1051.7
    725.9
(13/2+)
(11/2+)
   1627.2 11  B (11/2-)      337
   617
 
 
   1289.9
   1010.6
(9/2-)
(7/2-)
   1883.9 12  B (17/2+)      403
   832
 
 
   1480.7
   1051.7
(15/2+)
(13/2+)
   1999.1 12  B (13/2-)      372
   709
 
 
   1627.2
   1289.9
(11/2-)
(9/2-)
   2432.2 13  B (19/2+)      548
   952
 
 
   1883.9
   1480.7
(17/2+)
(15/2+)
   2437.1 13  B (15/2-)      438
   810
 
 
   1999.1
   1627.2
(13/2-)
(11/2-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)Final Levels
   2891.1 14  B (17/2-)      454
   892
 
 
   2437.1
   1999.1
(15/2-)
(13/2-)
   2894.0 14  B (21/2+)      462
  1010
 
 
   2432.2
   1883.9
(19/2+)
(17/2+)
   3424.1 15  B (19/2-)      533
   987
 
 
   2891.1
   2437.1
(17/2-)
(15/2-)
   3561.5 14  B (23/2+)      668
  1129
 
 
   2894.0
   2432.2
(21/2+)
(19/2+)
   3950.1 17  B (21/2-)     1059
 
   2891.1
(17/2-)
   4050.2 15  B (25/2+)      489
  1156
 
 
   3561.5
   2894.0
(23/2+)
(21/2+)
   4567.1 18  B (23/2-)     1143
 
   3424.1
(19/2-)
   4770.5 18  B (27/2+)     1209
 
   3561.5
(23/2+)
   5152.1 20  B (25/2-)     1202
 
   3950.1
(21/2-)
   5315.2 18  B (29/2+)     1265
 
   4050.2
(25/2+)
   5840.1 21  B (27/2-)     1273
 
   4567.1
(23/2-)
   6208.5 20  B (31/2+)     1438
 
   4770.5
(27/2+)
   6518.1 22  B (29/2-)     1366
 
   5152.1
(25/2-)
   6678.2 21  B (33/2+)     1363
 
   5315.2
(29/2+)
   8183.3 23  B (37/2+)     1505
 
   6678.2
(33/2+)
   9882 3  B (41/2+)     1699
 
   8183.3
(37/2+)
  11797 3  B (45/2+)     1915
 
   9882
(41/2+)
  13943 3  B (49/2+)     2146
 
  11797
(45/2+)

E(level): From least-squares fit to Eγ data, assuming 1 keV uncertainty for Eγ

Jπ(level): For excited states, assignments are from 1994Gr01 and are based on γγ(θ) (DCO) data (1994Gr01) and band associations. The details of the γγ(θ) measurements are not available, however.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 1 - Kπ=5/2+,α=+1/2.
      0.0 5/2(+) 9.0 s 2 
% ε = 100
% εp = 0.08 3
    
    418.2 7  (9/2+)      232
   418
 
 
    186.0
      0.0
(7/2+)
5/2(+)
   1051.7 10  (13/2+)      326
   633
 
 
    725.9
    418.2
(11/2+)
(9/2+)
   1883.9 12  (17/2+)      403
   832
 
 
   1480.7
   1051.7
(15/2+)
(13/2+)
   2894.0 14  (21/2+)      462
  1010
 
 
   2432.2
   1883.9
(19/2+)
(17/2+)
   4050.2 15  (25/2+)      489
  1156
 
 
   3561.5
   2894.0
(23/2+)
(21/2+)
   5315.2 18  (29/2+)     1265
 
   4050.2
(25/2+)
   6678.2 21  (33/2+)     1363
 
   5315.2
(29/2+)
   8183.3 23  (37/2+)     1505
 
   6678.2
(33/2+)
   9882 3  (41/2+)     1699
 
   8183.3
(37/2+)
  11797 3  (45/2+)     1915
 
   9882
(41/2+)
  13943 3  (49/2+)     2146
 
  11797
(45/2+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 2 - Kπ=5/2+,α=-1/2.
    186.0 7  (7/2+)       
    725.9 9  (11/2+)      308
   540
 
 
    418.2
    186.0
(9/2+)
(7/2+)
   1480.7 11  (15/2+)      429
   755
 
 
   1051.7
    725.9
(13/2+)
(11/2+)
   2432.2 13  (19/2+)      548
   952
 
 
   1883.9
   1480.7
(17/2+)
(15/2+)
   3561.5 14  (23/2+)      668
  1129
 
 
   2894.0
   2432.2
(21/2+)
(19/2+)
   4770.5 18  (27/2+)     1209
 
   3561.5
(23/2+)
   6208.5 20  (31/2+)     1438
 
   4770.5
(27/2+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 3 - Kπ=(3/2-),α=-1/2.
    612.8 8  (3/2-)       
   1010.6 9  (7/2-)      230
   398
   592
 
 
 
    780.8
    612.8
    418.2
(5/2-)
(3/2-)
(9/2+)
   1627.2 11  (11/2-)      337
   617
 
 
   1289.9
   1010.6
(9/2-)
(7/2-)
   2437.1 13  (15/2-)      438
   810
 
 
   1999.1
   1627.2
(13/2-)
(11/2-)
   3424.1 15  (19/2-)      533
   987
 
 
   2891.1
   2437.1
(17/2-)
(15/2-)
   4567.1 18  (23/2-)     1143
 
   3424.1
(19/2-)
   5840.1 21  (27/2-)     1273
 
   4567.1
(23/2-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 4 - Kπ=(3/2-),α=+1/2.
    780.8 9  (5/2-)       
   1289.9 10  (9/2-)      279
   509
 
 
   1010.6
    780.8
(7/2-)
(5/2-)
   1999.1 12  (13/2-)      372
   709
 
 
   1627.2
   1289.9
(11/2-)
(9/2-)
   2891.1 14  (17/2-)      454
   892
 
 
   2437.1
   1999.1
(15/2-)
(13/2-)
   3950.1 17  (21/2-)     1059
 
   2891.1
(17/2-)
   5152.1 20  (25/2-)     1202
 
   3950.1
(21/2-)
   6518.1 22  (29/2-)     1366
 
   5152.1
(25/2-)

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.05/2(+) 9.0 s 2 
% ε = 100
% εp = 0.08 3
μ=-0.348 4 (1992Li11,2019StZV), Q=+1.27 5 (1992Li11,2016St14)
Δ<r2>(88Sr-77Sr)=0.248 fm2 12, charge radius=4.2544 fm 22 (1992Li11).
E(level): Kπ=5/2+,α=+1/2.
    186.0(7/2+)   E(level): Kπ=5/2+,α=-1/2.
    418.2(9/2+)   E(level): Kπ=5/2+,α=+1/2.
    612.8(3/2-)   E(level): Kπ=(3/2-),α=-1/2.
    725.9(11/2+)   E(level): Kπ=5/2+,α=-1/2.
    780.8(5/2-)   E(level): Kπ=(3/2-),α=+1/2.
   1010.6(7/2-)   E(level): Kπ=(3/2-),α=-1/2.
   1051.7(13/2+)   E(level): Kπ=5/2+,α=+1/2.
   1289.9(9/2-)   E(level): Kπ=(3/2-),α=+1/2.
   1480.7(15/2+)   E(level): Kπ=5/2+,α=-1/2.
   1627.2(11/2-)   E(level): Kπ=(3/2-),α=-1/2.
   1883.9(17/2+)   E(level): Kπ=5/2+,α=+1/2.
   1999.1(13/2-)   E(level): Kπ=(3/2-),α=+1/2.
   2432.2(19/2+)   E(level): Kπ=5/2+,α=-1/2.
   2437.1(15/2-)   E(level): Kπ=(3/2-),α=-1/2.
   2891.1(17/2-)   E(level): Kπ=(3/2-),α=+1/2.
   2894.0(21/2+)   E(level): Kπ=5/2+,α=+1/2.
   3424.1(19/2-)   E(level): Kπ=(3/2-),α=-1/2.
   3561.5(23/2+)   E(level): Kπ=5/2+,α=-1/2.
   3950.1(21/2-)   E(level): Kπ=(3/2-),α=+1/2.
   4050.2(25/2+)   E(level): Kπ=5/2+,α=+1/2.
   4567.1(23/2-)   E(level): Kπ=(3/2-),α=-1/2.
   4770.5(27/2+)   E(level): Kπ=5/2+,α=-1/2.
   5152.1(25/2-)   E(level): Kπ=(3/2-),α=+1/2.
   5315.2(29/2+)   E(level): Kπ=5/2+,α=+1/2.
E(level)Jπ(level)T1/2(level)Comments
   5840.1(27/2-)   E(level): Kπ=(3/2-),α=-1/2.
   6208.5(31/2+)   E(level): Kπ=5/2+,α=-1/2.
   6518.1(29/2-)   E(level): Kπ=(3/2-),α=+1/2.
   6678.2(33/2+)   E(level): Kπ=5/2+,α=+1/2.
   8183.3(37/2+)   E(level): Kπ=5/2+,α=+1/2.
   9882(41/2+)   E(level): Kπ=5/2+,α=+1/2.
  11797(45/2+)   E(level): Kπ=5/2+,α=+1/2.
  13943(49/2+)   E(level): Kπ=5/2+,α=+1/2.

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