ADOPTED LEVELS, GAMMAS for 84Mo

Author: B. Singh |  Citation: Nucl. Data Sheets 110,2815 (2009) |  Cutoff date: 30-Sep-2009 

 Full ENSDF file | Adopted Levels (PDF version) 


S(n)= 1.59×104 keV SYS(p)= 3.4×103 keV SYQ(α)= -1.4×103 keV SY
Reference: 2012WA38

References:
  A  58Ni(28Si,2nγ),28Si(58Ni,2nγ) 

General Comments:

84Mo evaluated by B. Singh

2007WeZX, 2002Fa13, 2001Ki13: 84Mo isotope formed in the fragmentation of 112Sn beam at 1 GeV/nucleon with nickel target using fragment separator FRS at GSI facility. Measured positrons, γ rays and isotopic half-life. These measurements are also described in two Ph.d. theses from the University of Munich in 2001 by E. Wefers and α. Stolz

2001Ga24: 84Mo produced by fragmentation of 92Mo beam at 60 MeV/nucleon with nickel target at GANIL facility using LISE3 separator. Measured positrons as a function of time and suggested that 84Mo half-life is in the range of few seconds. The authors quoted half-life of 3.6 s 7 from a conference report by the GSI group (2002Fa13)

2009St04: E=140 MeV/nucleon 124Xe beam provided by coupled K500 and K1200 cyclotrons at NSCL, MSU. A1900 fragment separator used to analyze and separate 84Mo fragments which were then implanted on double-sided silicon strip detector for β counting. Measured prompt and delayed γ rays using SeGA array of 16 Ge detectors. The half-life was measured from β decay events of 366 decay chains. From βγ coin measurements, no γ rays could be assigned to 84Nb

This nuclide is important from structure point-of-view for several reasons e.g. n=Z nucleus and subsequent description of deformation trends; t=0 n-p pairing interaction; astrophysical significance as a ’waiting-point’ nuclide in the rp process of nucleosynthesis in x-ray bursts, etc.

Structure calculations (deformation, yrast levels, etc.): 2006Sa25 (also 2006Sa45) (half-life=1-2 s); 2004Su082 of ≈0.28), 2004Wa312=0.37)

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

Q-value: ΔS(n)=640, ΔS(p)=500, ΔQ(α)=1540 (syst,2009AuZZ).

Q-value: Q(εp)=4120 400 (syst,2009AuZZ)

Q-value: Values in 2003Au03 are: S(n)=16130 640, S(p)=4140 510, Q(α)=-2710 1540, Q(εp)=3360 410; all from systematics








E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
Final Levels
     0.0A 0+ 2.3 s 3 
% ε = 100
% εp = ?
   
   443.9 2 A (2+)      443.9 2 
     0.0
0+
  1117.3 6 A (4+)      673.4 5 
   443.9
(2+)
  2006.4 8 A (6+)      889.1 6 
  1117.3
(4+)
  3069.4 10 A (8+)     1063.0 6 
  2006.4
(6+)
  4276.4 15 A (10+)     1207 1 
  3069.4
(8+)

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)Final Levels
Band 1 - Yrast (g.s.) band.
     0.0 0+ 2.3 s 3 
% ε = 100
% εp = ?
   
   443.9 2  (2+)      443.9 2 
     0.0
0+
  1117.3 6  (4+)      673.4 5 
   443.9
(2+)
  2006.4 8  (6+)      889.1 6 
  1117.3
(4+)
  3069.4 10  (8+)     1063.0 6 
  2006.4
(6+)
  4276.4 15  (10+)     1207 1 
  3069.4
(8+)

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 2.3 s 3 
% ε = 100
% εp = ?
T=0
Delayed proton decay is possible but none has been studied.
E(level): Yrast (g.s.) band.
Jπ(level): Members of the yrast band based on g.s.; systematics of yrast structures of n=Z nuclei.
   443.9(2+)   E(level): Yrast (g.s.) band.
Jπ(level): Members of the yrast band based on g.s.; systematics of yrast structures of n=Z nuclei.
  1117.3(4+)   E(level): Yrast (g.s.) band.
Jπ(level): Members of the yrast band based on g.s.; systematics of yrast structures of n=Z nuclei.
  2006.4(6+)   E(level): Yrast (g.s.) band.
Jπ(level): Members of the yrast band based on g.s.; systematics of yrast structures of n=Z nuclei.
  3069.4(8+)   E(level): Yrast (g.s.) band.
Jπ(level): Members of the yrast band based on g.s.; systematics of yrast structures of n=Z nuclei.
  4276.4(10+)   E(level): Yrast (g.s.) band.
Jπ(level): Members of the yrast band based on g.s.; systematics of yrast structures of n=Z nuclei.

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Additional Gamma Comments:

E(level)E(gamma)Comments

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