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First identification of excited states in 106Te and evidence for isoscalar-enhanced vibrational collectivity
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0003-1771-2656
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
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2005 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 72, no 4, 041303-1-041303-5 p.Article in journal (Refereed) Published
Abstract [en]

Gamma-ray transitions in the extremely neutron-deficient nucleus Te-106 have been identified for the first time. The experiment utilized the Fe-54(Fe-54,2n)Te-106(*) reaction, and the gamma-ray transitions from excited states in Te-106 were selected by use of the recoil-decay-tagging technique. The production cross section was estimated at 25 nb, a new limit for in-beam gamma-ray spectroscopy. A ground-state band tentatively extending up to I-pi=10(+) is proposed. The systematics of low-lying yrast states in the Te isotopes is discussed within the context of vibrational excitations and residual nucleon-nucleon interactions.

Place, publisher, year, edition, pages
2005. Vol. 72, no 4, 041303-1-041303-5 p.
Keyword [en]
HIGH-SPIN STATES; SINGLE-PARTICLE; NEUTRON-STARS; NUCLEI; SPECTROSCOPY; DECAY; ISOTOPES; EXCITATIONS; XE-110; LIVES
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-7870DOI: 10.1103/PhysRevC.72.041303ISI: 000232935400004Scopus ID: 2-s2.0-28844448624OAI: oai:DiVA.org:kth-7870DiVA: diva2:13023
Note
QC 20100729Available from: 2008-01-08 Created: 2008-01-08 Last updated: 2010-08-20Bibliographically approved
In thesis
1. In-beam Study of Extremely Neutron deficient Nuclei Using the Recoil-Decay Tagging Technique
Open this publication in new window or tab >>In-beam Study of Extremely Neutron deficient Nuclei Using the Recoil-Decay Tagging Technique
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

The low-lying structures of the extremely neutron-deficient nuclei 106Te, 107Te, 110Xe, 170Ir and 172Au have been investigated experimentally. Prompt gamma rays emitted in fusion-evaporation reactions were detected by the Jurogam HPGe array. The gamma rays were assigned to specific reaction channels using the recoil-decay tagging technique provided by the gas-filled separator RITU and the GREAT focal-plane spectrometer. The experimental set-up and the technique used to extract the information from the experimental data are described in detail.

Results were interpreted in terms of the nuclear shell model and Total Routhian Surface calculations. In addition, decay studies on 170Ir, 172Au and 164Re led to the discovery of new alpha-decay branches in these nuclei.

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. x, 57 p.
Series
Trita-FYS, ISSN 0280-316X ; 2007:86
Keyword
Nuclear structure
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-4596 (URN)978-91-7178-844-3 (ISBN)
Public defence
2008-01-18, FA32, AlbaNova, Roslagstullsbacken 21, stockholm, 14:00
Opponent
Supervisors
Note
QC 20100730Available from: 2008-01-08 Created: 2008-01-08 Last updated: 2012-03-26Bibliographically approved
2. In-beam study of 106Te and 107Te using the recoil decay tagging technique
Open this publication in new window or tab >>In-beam study of 106Te and 107Te using the recoil decay tagging technique
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

Atomic nuclei are complex many-body systems and exhibit an interplay between single-particle and collective degrees of freedom. In order to describe and predict the “behavior” of nucleons inside the nuclei a variety of theoretical models have been created, each applicable to their own domain of nuclear phenomena. Experimental information is needed in order to test and improve the various theoretical models with the ultimate goal of creating unified theory of nuclear structure. In-beam γ-ray spectroscopy is one way of probing the inner structure of nuclei and it is the subject of this thesis, which describes the first identification of excited states in the extremely neutron deficient nuclei 106Te and 107Te. The experiments were performed at the Accelerator Laboratory of the University of Jyväskylä, Finland, using the recoil-decay tagging technique. Prompt γ rays emitted following fusion evaporation reactions were detected by the Jurogam detector array and the selection of the γ rays of interest was based on the recoil identification provided by the RITU gas-filled recoil separator and the GREAT focal plane spectrometer. The production cross sections were estimated to be 25nb and 1μb for 106Te and 107Te, respectively. In case of the nucleus 106Te, several γ rays have been observed. A vibrational-like yrast band has been suggested. For 107Te a number of γ rays have been assigned and a tentative partial level scheme has been suggested. The experimental data have been compared to shell model calculations.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. vii, 28 p.
Series
Trita-FYS, ISSN 0280-316X ; 2006:46
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-4060 (URN)91-7178-407-1 (ISBN)
Presentation
2006-06-16, Sal FB55, AlbaNova univ. centrum, Roslagstullsbacken, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20101115Available from: 2006-06-21 Created: 2006-06-21 Last updated: 2011-10-05Bibliographically approved

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