ADOPTED LEVELS for 200Fr

Authors: F.G. Kondev, S. Lalkovski |  Citation: Nucl. Data Sheets 108,1471 (2007) |  Cutoff date: 1-Aug-2006 

 Full ENSDF file | Adopted Levels (PDF version) 


S(n)= 8.70×103 keV 8S(p)= -3.5×102 keV 9Q(α)= 7.62×103 keV 5
Reference: 2012WA38

General Comments:

Identification:

2005De01: produced in a bombardment with a 1.4 GeV pulsed proton beam on 51 g/cm2 thorium/graphite target; Detectors: on-line mass separator, recoils were implanted on a carbon foil for 100 ms and subsequent a decays were detected using a 400 mm2, 1 mm thick silicon detector for a 1100 ms time period; Measured: Eα, T1/2

1996En01: produced using 170Yb(35Cl,4n), E(35Cl)=205 and 213 MeV; Target: 72 % enriched in 170Yb; Detectors: gas filled mass separator, position sensitive silicon detectors with a typical resolution (FWHM) of 35 keV; Measured: Eα, T1/2. Assignment to 200Fr is based on the observed Eα-Eα correlation with the characteristic daughter α-decay.

1995Mo14: produced using 169Tm(36Ar,5n), E(36Ar)=186 MeV; Beam Intensity: 1.31011 ions/s; Target: self-supporting, 2 mg/cm2 thick; Detectors: gas filled recoil separator, position sensitive silicon detectors with a typical energy resolution (FWHM) of 70 keV and position resolution (FWHM) of 0.2 mm (horizontal direction) and 0.5 mm (vertical direction), microchannel plate assembly located about 60 cm upstream from the Si detectors; Measured: Eα, T1/2. Assignment to 200Fr is based on the observed Eα-Eα correlation with the characteristic daughter (196At) α-decay.

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





E(level)
(keV)
Jπ(level) T1/2(level)
  0 (3+) 49 ms 4 
% α = 100

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0(3+) 49 ms 4 
% α = 100
Configuration=((π h9/2)+1(ν p3/2)-1)(π+4-12)0+. The assignment is tentative.
E(level): Configuration=((π h9/2)+1(ν p3/2)-1)(π+4-12)0+. The assignment is tentative.

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