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Nuclear hyperfine mixing in 229Th89+ 2024 |
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Message ID: 71
Entry time: Thu Jun 13 18:48:26 2024
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Author: |
Ruijiu Chen, David, Shahab, Yuri |
Category: |
Analysis |
Subject: |
The ion identification of 229Th is correct. |
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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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