General Info

Field Value
Experiment Number e775s
Title Lifetime measurements of excited states in 20O populated by direct nucleon transfer
Spokeperson(s)
Emmanuel, Clement ORCID Profile
Alain, Goasduff ORCID Profile
Data Manager(s)
Clement, Emmanuel ORCID Profile
Alain, Goasduff ORCID Profile
GANIL Scientific Coordinator
Collection Dates
(dd-mm-yy)		 Start: 23-02-2020
End: 05-03-2020
End of Embargo 05-03-2025
DOI 10.26143/ganil-2020-e775s
DOI State findable
Publication Year 2020
Publisher GANIL, Large Heavy Ion National Accelerator, Caen, France
Data Curator
GANIL, Large Heavy Ion National Accelerator, Caen, France ROR Profile
Hosting Institution
CC-IN2P3, IN2P3’s Computing Centre, Villeurbanne, France ROR Profile
Size 19 TB

Experiment details

Abstract

The oxygen isotopes are a fantastic laboratory for the study of the nuclear force and phenomena when approaching the drip line. Neutron rich Oxygen isotopes have revealed the reduction of the N=20 shell gap and the possible role of the 3-body interaction in the nuclear force. Non-yrast states in even-even isotopes can provide relevant information in the study of realistic interactions in the sd-shells. In particular, the second 2+ and first 3+ states in 20O constructed from a pure neutron excitation (d5/2)3(s1/2)1 is sensitive to the relative position of d5/2 and s1/2 shell which can be influenced by the contribution of the 3-body interaction. Due to this simple configuration, the 2+2 state is strongly populated in the 19O(d,p)20O reaction. Using the selectivity of the VAMOS++ spectrometer, the high intense secondary beam of 19O from SPIRAL1, the accurate excitation energy selection in 20O using the MUGAST array and the high resolution gamma-ray spectrometer AGATA, we propose to perform an accurate measurement of the fs lifetime of the 2+2 and 3+1 states via their gamma decay to the first 2+ state. This experiment will be a pioneer experiment aiming at combining direct reaction with lifetime measurement in the fs range.

Setup

Setup VAMOS + MUGAST + AGATA

Beam(s)

Ion(s) Charge state Energy Energy unit Av. intensity Intensity unit Purity (%) Accelerator Production
190 8+ 8 MeV/u 2.e+5 pps 100 Radioactive SPIRAL1

Target(s)

Material Thickness Thickness unit Sample phase Type
CD2 + Au 0.3 + 20 mg/cm2 Solid Compound

Studied reaction(s)

Name Projectile Target
190 (8 MeV/u) + CD2 + Au (0.3 + 20 mg/cm2) 190(8+) @ 8 MeV/u CD2 + Au (0.3 + 20 mg/cm2)

Contributors

Given Name Family Name Id. Affiliation(s)
Irene Zanon ORCID Profile
Legnaro National Laboratories ROR Profile
Agustín J. Menéndez Menéndez ORCID Profile
University of Barcelona ROR Profile
Takayuki Miyagi ORCID Profile
Technical University of Darmstadt ROR Profile
Marlène Assié ORCID Profile
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie ROR Profile
Michał Ciemała ORCID Profile
Institute of Nuclear Physics, Polish Academy of Sciences ROR Profile
Freddy FLAVIGNY ORCID Profile
Laboratoire de Physique Corpusculaire de Caen ROR Profile
Antoine LEMASSON ORCID Profile
GANIL ROR Profile
Adrien Matta ORCID Profile
Laboratoire de Physique Corpusculaire de Caen ROR Profile
Diego Ramos ORCID Profile
GANIL ROR Profile
Mauricy Rejmund ORCID Profile
GANIL ROR Profile

Institutes

Name Id.

Citation 

e775s Collaboration, e775s GANIL dataset (2020). doi:https://doi.org/10.26143/ganil-2020-e775s.

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