ADOPTED LEVELS, GAMMAS for 76Sr

Authors: Balraj Singh and Ameenah Farhan |  Citation: ENSDF |  Cutoff date: 28-FEB-2011 

Author: Balraj Singh |  Citation: Nucl. Data Sheets 74,63 (1995) |  Cutoff date: 22-Dec-1994 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-1.56×104 keV SYS(n)= 1.570×104 keV 23S(p)= 4.32×103 keV 4Q(α)= -2.73×103 keV 4
Reference: 2012WA38

References:
  A  24Mg(54Fe,2nγ)  B  40Ca(40Ca,2P2NG)

General Comments:

; S(2n)=29563 105 (syst), S(2p)=6494 35, Q(εp)=2787 35 (2009AuZZ)

; Values in 2003Au03 are nearly the same as in 2009AuZZ: Q(β-)=-15540 500 (syst), S(n)=15690 220, S(p)=4310 40, Q(α)=-2730 40, Q(εp)=2790 40, S(2n)=29690 500 (syst), S(2p)=6490 40

n=Z=38 nuclide; important from structure point-of-view, pp, nn, strong n-p correlations, waiting point nucleus in astrophysical significance, and large deformation, almost approaching superdeformation.

Identification of 76Sr nuclide: 1990Li25 (in-beam γ-ray spectroscopy, also 1988NaZO and 1988LiZP), 1992Gr09 (half-life measurement), 2004De24 (half-life and delayed-proton study)

Mass measurements: 2005Si34 (also 2004He32), 2001La31

Structure calculations: 2009Sa15 (potential energy curves, electric monopole strengths, Gamow-Teller strength, half-life), 2007Ha48 (levels), 1994Na09, 1993Ki04 (n-p interaction role in deformation); 1993Pa10 (deformation of 76Sr g.s.), 1993Ha23, 1993Sh11, 1992Ma39 (binding energy, rms charge radii); 1992Bi07 (T1/2 for 76Sr); 1986Ga04 (potential energy surfaces)

No information is available from radioactive decay of 76Y

Q-value: Note: Current evaluation has used the following Q record

Q-value: Estimated ΔQ-=504 (2009AuZZ)









E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)Final Levels
      0.0AB 0+ 7.89 s 7 
% ε = 100
% εp = 3.4×10-5 8
    
    262.3 2 AB (2+)      262.3 2 
  100
      0.0
0+
    746.7 3 AB (4+)      484.4 2 
  100
    262.3
(2+)
   1446.3 4 AB (6+)      699.6 2 
  100
    746.7
(4+)
   2340.5 4 AB (8+)      894.2 2 
  100
   1446.3
(6+)
   3409.5 11 AB (10+)     1069 1 
  100
   2340.5
(8+)
   4629.5 15 AB (12+)     1220 1 
  100
   3409.5
(10+)
   5978.5 18 AB (14+)     1349 1 
  100
   4629.5
(12+)
   7426.6 21  B (16+)     1448 1 
  100
   5978.5
(14+)
   8943.6 23  B (18+)     1517 1 
  100
   7426.6
(16+)
  10536.6 25  B (20+)     1593 1 
  100
   8943.6
(18+)
  12276.6 27  B (22+)     1740 1 
  100
  10536.6
(20+)
  14229.6 29 ? B (24+)     1953 1 ?
 
  12276.6
(22+)

Jπ(level): Syst of even-even nuclides, observation of a γ cascade typical of prolate rotors, shell-model calculations

E(γ): From 40Ca(40Ca,2p2nγ) for consistency over the whole energy region

Back to top

Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 1 - GS, yrast band.
      0.0 0+ 7.89 s 7 
% ε = 100
% εp = 3.4×10-5 8
    
    262.3 2  (2+)      262.3 2 
  100
      0.0
0+
    746.7 3  (4+)      484.4 2 
  100
    262.3
(2+)
   1446.3 4  (6+)      699.6 2 
  100
    746.7
(4+)
   2340.5 4  (8+)      894.2 2 
  100
   1446.3
(6+)
   3409.5 11  (10+)     1069 1 
  100
   2340.5
(8+)
   4629.5 15  (12+)     1220 1 
  100
   3409.5
(10+)
   5978.5 18  (14+)     1349 1 
  100
   4629.5
(12+)
   7426.6 21  (16+)     1448 1 
  100
   5978.5
(14+)
   8943.6 23  (18+)     1517 1 
  100
   7426.6
(16+)
  10536.6 25  (20+)     1593 1 
  100
   8943.6
(18+)
  12276.6 27  (22+)     1740 1 
  100
  10536.6
(20+)
  14229.6 29 ? (24+)     1953 1 ?
 
  12276.6
(22+)

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.00+ 7.89 s 7 
% ε = 100
% εp = 3.4×10-5 8
The shape of g.s. of 76Sr nuclide was investigated through TAGS measurement of 76Sr decay and derived β-strength function. The β-strength function, thus deduced, was compared to the calculated shapes for oblate and prolate deformation of the g.s. of 76Sr. The agreement was obtained only for the prolate shape (2004An16, also 2005Ru07, 2004De24, 2004Na17 and 2003Ma69). From this study estimated β2=0.4 (2004Na16), with a definite prolate shape.
E(level): GS, yrast band.
    262.3(2+)   E(level): GS, yrast band.
    746.7(4+)   E(level): GS, yrast band.
   1446.3(6+)   E(level): GS, yrast band.
   2340.5(8+)   E(level): GS, yrast band.
   3409.5(10+)   E(level): GS, yrast band.
   4629.5(12+)   E(level): GS, yrast band.
   5978.5(14+)   E(level): GS, yrast band.
   7426.6(16+)   E(level): GS, yrast band.
   8943.6(18+)   E(level): GS, yrast band.
  10536.6(20+)   E(level): GS, yrast band.
  12276.6(22+)   E(level): GS, yrast band.
  14229.6(24+)   E(level): GS, yrast band.

Back to top