Published January 1, 2020
| Version v1
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Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in Sn-106,Sn-108
Creators
- Siciliano, M.
- Valiente-Dobon, J. J.1
- Goasduff, A.
- Nowacki, F.2
- Zuker, A. P.2
- Bazzacco, D.3
- Lopez-Martens, A.4
- Clement, E.
- Benzoni, G.5
- Braunroth, T.6
- Crespi, F. C. L.
- Cieplicka-Orynczak, N.
- Doncel, M.7
- Ertuerk, S.8
- de France, G.
- Fransen, C.6
- Gadea, A.9
- Georgiev, G.4
- Goldkuhle, A.6
- Jakobsson, U.10
- Jakobsson, U.10
- 1. Ist Nazl Fis Nucl, Lab Nazl Legnaro, Legnaro, PD, Italy
- 2. Univ Strasbourg, IPHC, CNRS IN2P3, Strasbourg, France
- 3. Ist Nazl Fis Nucl, Sez Padova, Padua, Italy
- 4. Univ Paris Saclay, CSNSM, CNRS IN2P3, Orsay, France
- 5. Ist Nazl Fis Nucl, Sez Milano, Milan, Italy
- 6. Univ Cologne, Inst Kernphys, Cologne, Germany
- 7. Univ Salamanca, Salamanca, Spain
- 8. Omer Halisdemir Univ, Nigde, Turkey
- 9. Univ Valencia, Inst Fis Corpuscular, CSIC, Valencia, Spain
- 10. Royal Inst Technol, Dept Phys, Stockholm, Sweden
Description
The lifetimes of the low-lying excited states 2(+) and 4(+) have been directly measured in the neutron-deficient Sn-106,Sn-108 isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted gamma rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the B(E2; 2(1)(+) -> 0(g.s)(+)) values and it describes well the experimental pattern for Sn104-114 ; the B(E2;(+)(4) -> 2(1)(+)) values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in Sn-108. (C) 2020 The Authors. Published by Elsevier B.V.
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