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Excited State Lifetime Measurements in Rare Earth Nuclei with Fast Electronics

Werner, V. ; Cooper, N. ; Bonett-Matiz, M. ; Williams, E. ; Régis, J.-M. ; Rudigier, M. ; Ahn, T. ; Anagnostatou, V. ; Berant, Z. ; Bunce, M. ; Elvers, M. ; Heinz, A. ; Ilie, G. ; Jolie, J. ; Radeck, D. ; Savran, D. ; Smith, M. (2011)
Excited State Lifetime Measurements in Rare Earth Nuclei with Fast Electronics.
In: Journal of Physics: Conference Series, 312 (9)
doi: 10.1088/1742-6596/312/9/092062
Article, Bibliographie

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Abstract

We investigated the collectivity of the lowest excited 2⁺ states of even-even rare earth nuclei. The B(E2) excitation strengths of these nuclei should directly correlate to the size of the valence space, and maximize at mid-shell. The previously identified saturation of B(E2) strength in well-deformed rotors at mid-shell is put to a high precision test in this series of measurements. Lifetimes of the 2⁺1 states in ¹⁶⁸Hf and ¹⁷⁴W have been measured using the newly developed LaBr₃ scintillation detectors. The excellent energy resolution in conjunction with superb time properties of the new material allows for reliable handling of background, which is a source of systematic error in such experiments. Preliminary lifetime values are obtained and discussed in the context of previous and ongoing work.

Item Type: Article
Erschienen: 2011
Creators: Werner, V. ; Cooper, N. ; Bonett-Matiz, M. ; Williams, E. ; Régis, J.-M. ; Rudigier, M. ; Ahn, T. ; Anagnostatou, V. ; Berant, Z. ; Bunce, M. ; Elvers, M. ; Heinz, A. ; Ilie, G. ; Jolie, J. ; Radeck, D. ; Savran, D. ; Smith, M.
Type of entry: Bibliographie
Title: Excited State Lifetime Measurements in Rare Earth Nuclei with Fast Electronics
Language: English
Date: 23 September 2011
Publisher: IOP Publishing
Journal or Publication Title: Journal of Physics: Conference Series
Volume of the journal: 312
Issue Number: 9
Collation: 6 Seiten
DOI: 10.1088/1742-6596/312/9/092062
Corresponding Links:
Abstract:

We investigated the collectivity of the lowest excited 2⁺ states of even-even rare earth nuclei. The B(E2) excitation strengths of these nuclei should directly correlate to the size of the valence space, and maximize at mid-shell. The previously identified saturation of B(E2) strength in well-deformed rotors at mid-shell is put to a high precision test in this series of measurements. Lifetimes of the 2⁺1 states in ¹⁶⁸Hf and ¹⁷⁴W have been measured using the newly developed LaBr₃ scintillation detectors. The excellent energy resolution in conjunction with superb time properties of the new material allows for reliable handling of background, which is a source of systematic error in such experiments. Preliminary lifetime values are obtained and discussed in the context of previous and ongoing work.

Additional Information:

International Nuclear Physics Conference 2010 (INPC2010); Erstveröffentlichung; Art.No.: 092062

Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 05 Mar 2024 11:53
Last Modified: 05 Mar 2024 11:53
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