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  Nuclear hyperfine mixing in 229Th89+ 2024  Not logged in ELOG logo
Message ID: 71     Entry time: Thu Jun 13 18:48:26 2024
Author: Ruijiu Chen, David, Shahab, Yuri 
Category: Analysis 
Subject: The ion identification of 229Th is correct. 
Harmonic: 124.0 , Bp: 7.796046 [Tm]
ion            fre[Hz]                       yield [pps]    
------------------------------------------------------------
237U+92        243732740.7822311819          8.6164e+03     
237Np+92       243732858.1891748905          1.9672e+02     

224Ac+87       243759120.6575988531          1.7025e+03     

229Pa+89       243784072.1343108118          2.5529e+03     
229Th+89       243784111.0000000000          3.3883e+03   
  
234Pa+91       243807737.9699291289          2.4721e+03     
234Np+91       243807852.4158236086          1.7745e+01     

The strongest line is 229Th+89/229Pa+89. The yield and frequency of 229Pa+89 and 229Th+89 are very close to each other.  We needed to 
install Al target to suppress Pa as much as possible. Al gives a better ratio of h-like to he-like than Be. Two peaks at left 
side are 237U+92/237Np+92 and 224Ac+87. One peak at right side is 
234Pa+91/234Np+91. 

Note added 2024-06-14 (Carsten): a) We will not produce Np, this is an artifact of Lise, b) relative intensities are for injection only. Line intensities for  237U/224Ac/234Pa are substantially lower after cooling/HF/deceleration.
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