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New atomic masses related to fundamental physics measured with SMILETRAP
Stockholm University, Faculty of Science, Department of Physics.
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis describes the recent improvements of the SMILETRAP Penning trap mass spectrometer and a number of interesting high precision mass measurements, which have been performed using the improved apparatus, and are relevant in todays fundamental physics problems. The mass of the hydrogen-like 24,26Mg ions as well as the masses of the hydrogen- and lithium-like 40Ca ions are presented in this work that are indispensable input values when evaluating g-factor measurements of the bound electron. In both cases the uncertainty in the masses was improved by one order of magnitude compared to the literature values known so far.

The mass of 7Li has been measured and a new mass value has been obtained with an unprecedented relative uncertainty of 6.3x10-10. A large deviation of 1.1 μu (160ppb) compared to the literature value has been observed. In order to find the reason of this large deviation and to look for possible systematics we have measured the mass of 4He and 6Li and concluded that the 6Li(n,γ)7Li reaction Q-value used in the literature when calculating the 7Li mass is wrong by about 1 keV.

The mass difference between 3He and 3H (Δ m (3H -3He)) is the Q-value of the tritium β-decay. An accurate knowledge of the tritium Q-value is of importance in the search for a finite rest mass of the electron neutrino.

By adding a measurement of the mass of 3He1+ to previous mass measurement of 3H1+ and 3He2+ we have improved our previous Q-value by a factor of 2. At the moment our Q-value is the most accurate and more importantly it is based on the correct atomic mass values.

Place, publisher, year, edition, pages
Stockholm: Fysikum , 2005. , 51 p.
Keyword [en]
Penning Trap, mass spectrometry
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:su:diva-737ISBN: 91-7155-166-2 (print)OAI: oai:DiVA.org:su-737DiVA: diva2:198140
Public defence
2005-12-19, sal FA32, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 13:00 (English)
Opponent
Supervisors
Available from: 2005-11-25 Created: 2005-11-25 Last updated: 2011-04-27Bibliographically approved
List of papers
1. High-precision mass measurements of hydrogen-like 24Mg11+ and 26Mg11+ ions in a Penning Trap
Open this publication in new window or tab >>High-precision mass measurements of hydrogen-like 24Mg11+ and 26Mg11+ ions in a Penning Trap
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2003 In: Eur.Phys.J.D., Vol. 22, 41-45 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-24699 (URN)
Note
Part of urn:nbn:se:su:diva-737Available from: 2005-11-25 Created: 2005-11-25Bibliographically approved
2. Precision mass measurements of 40Ca17+ and 40Ca19+ ions in a Penning trap
Open this publication in new window or tab >>Precision mass measurements of 40Ca17+ and 40Ca19+ ions in a Penning trap
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2006 (English)In: European Physical Journal D: Atomic, Molecular and Optical Physics, ISSN 1434-6060, E-ISSN 1434-6079, Vol. 39, no 1, 1-4 p.Article in journal (Refereed) Published
Abstract [en]

High-precision mass measurements on lithium-like and hydrogen-like 40Ca-ions are reported. The obtained mass of the hydrogen-like and lithium-like ion is 39.952181819(29) u and 39.953272223(24) u, respectively. The corresponding mass of the 40Ca atom is 39.962590858(22) u. This new value has a precision ten times higher than the literature value.

National Category
Physical Sciences
Identifiers
urn:nbn:se:su:diva-12585 (URN)10.1140/epjd/e2006-00064-8 (DOI)
Available from: 2008-01-15 Created: 2008-01-15 Last updated: 2017-12-13Bibliographically approved
3. New Mass Value for 7Li
Open this publication in new window or tab >>New Mass Value for 7Li
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2006 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 96, no 16, 163004- p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-34862 (URN)10.1103/PhysRevLett.96.163004 (DOI)
Available from: 2010-01-13 Created: 2010-01-13 Last updated: 2017-12-12Bibliographically approved
4. On the Q-value of the tritium β-decay
Open this publication in new window or tab >>On the Q-value of the tritium β-decay
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Manuscript (Other academic)
Identifiers
urn:nbn:se:su:diva-24702 (URN)
Note
Part of urn:nbn:se:su:diva-737Available from: 2005-11-25 Created: 2005-11-25 Last updated: 2010-01-13Bibliographically approved

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