ADOPTED LEVELS for 237Am

Author: M. S. Basunia |  Citation: Nucl. Data Sheets 107, 2323 (2006) |  Cutoff date: 15-Mar-2006 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-2.68×103 keV SYS(n)= 7.54×103 keV SYS(p)= 3.62×103 keV SYQ(α)= 6.20×103 keV SY
Reference: 2012WA38

General Comments:

For calculation of mass excess by a semiempirical method, see 1988Po04.

Q-value: Note: Current evaluation has used the following Q record -2710 syst 7680 syst 3620 syst 6200 syst 2003Au03

Q-value: ΔQ(β-)=220(syst), ΔS(n)=120(syst), ΔS(p)=60(syst), ΔQ(α)=30(syst) 2003Au03





E(level)
(keV)		Jπ(level) T1/2(level)
   0.0 5/2(-) 73.6 m 8 
% ε = 99.975 3
% α = 0.025 3
  24.0E+2 20  5 ns 2 
% SF > 0

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
   0.05/2(-) 73.6 m 8 
% ε = 99.975 3
% α = 0.025 3
(α)/(α+ε)=0.00025 3 was deduced by measuring the α and γ spectra of the same sample (1975Ah05). Iγ(280.2γ)=0.473 20 per ε decay was used. In 1952Hi63 an α/ε=9.1×10-6 33 value was determined from ce- and α-counting rates, assuming that 239Pu(d,3n) and 239Pu(d,4n) reactions had equal yields at E(d)=30-50 MeV.
E(level): (α)/(α+ε)=0.00025 3 was deduced by measuring the α and γ spectra of the same sample (1975Ah05). Iγ(280.2γ)=0.473 20 per ε decay was used. In 1952Hi63 an α/ε=9.1×10-6 33 value was determined from ce- and α-counting rates, assuming that 239Pu(d,3n) and 239Pu(d,4n) reactions had equal yields at E(d)=30-50 MeV.
  24.0E+2 5 ns 2 
% SF > 0
Only SF decay reported.
E(level): Only SF decay reported.

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