ADOPTED LEVELS for 252Md

Authors: A.M. Mattera, S. Zhu, A.B. Hayes, E.A. Mccutchan |  Citation: Nucl. Data Sheets 172, 543 (2021) |  Cutoff date: 1-Jan-2021 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-2360 keV SYS(n)= 6530 keV SYS(p)= 2730 keV SYQ(α)= 7790 keV SY
Reference: 2017WA10

References:
  A  256Lr α decay 

General Comments:

Assignment: 243Am(13C,4n) reaction (1973Es01), 238U(19F,5n) reaction (1965Do09), parent of 252Fm (7039-keV α from 252Fm) (1965Do09,1973Es01).

Measured mass excess = 80467 keV 89 (stat) 22 (syst) using multi-reflection tof (2018It04).

Q-value: ΔQ(β-)=130, ΔS(n)=130, ΔS(p)=130, ΔQ(α)=140 (2017Wa10)

Q-value: S(2n)=14260 (syst) 330; S(2p)=7290 (syst) 160 (2017Wa10)





E(level)
(keV)
XREF T1/2(level)
     0.0  2.3 m 8 
% ε ≤ 100
   ≈49A  
  ≈158A  
  ≈204A  
  ≈246A  
  ≈287A  
  ≈359A  

E(level): Excited level energies are calculated from the α energies measured in 256Lr decay and Q(α)(256Lr)≈8810, obtained by 2017Wa10 from Q(α) systematics. 2017Wa10 estimate ΔQ(α)=140.

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.0 2.3 m 8 
% ε ≤ 100
No α decay from 252Md was observed by 1973Es01 and 1965Do09. The α decay of 252Fm was observed by 1965Do09 and 1973Es01 following ε decay of 252Md. No upper limit was given for detection of any α from 252Md g.s. was given.
E(level): No α decay from 252Md was observed by 1973Es01 and 1965Do09. The α decay of 252Fm was observed by 1965Do09 and 1973Es01 following ε decay of 252Md. No upper limit was given for detection of any α from 252Md g.s. was given.

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