General Info
| Field | Value |
|---|---|
| Experiment Number | e869_22 |
| Title | Evolution of the neutron 1d3/2-1d5/2 spin-orbit splitting in N=19 isotones and Fermi surface in 34Si |
| Spokeperson(s) |
Franco, Galtarossa
Olivier, Sorlin
|
| Data Manager(s) |
Franco, Galtarossa
|
| GANIL Scientific Coordinator | |
| Collection Dates (dd-mm-yy) |
Start: 21-05-2025 End: 29-05-2025 |
| End of Embargo | 29-05-2028 |
| DOI | 10.26143/ganil-2025-e869_22 |
| DOI State | findable |
| Publication Year | 2025 |
| Publisher | GANIL, Large Heavy Ion National Accelerator, Caen, France |
| Data Curator |
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Hosting Institution |
(CC-IN2P3) IN2P3’s Computing Centre, Villeurbanne, France
|
| Size | 2 TB |
Experiment details
Abstract
The e869_22 experiment aims to probe the neutron magicity at N=20 in 34Si by determining whether the f and p valence orbitals located above the N=20 gap are populated or not; and to determine the evolution of the d5/2–d3/2 splitting between the nuclei 34Si, 36S, and 40Ca, in order to better understand the role of spin–orbit and tensor components of the nuclear force. The neutron orbitals of this nucleus are populated via the (p,d) reaction, which transfers a neutron from a radioactive 34Si projectile. This projectile is produced by fragmentation and selected in flight at 50 MeV/u using the LISE spectrometer, and it interacts with the protons of a CH2 target of 5 mg/cm2, placed within the CATS–MUST2–EXOGAM2–ZDD setup. The removal of a neutron from 34Si and the characterization of the neutron orbitals of the residual nucleus 33Si are carried out by studying the energy and emission angle of the deuterons emitted at forward angles, using the MUST2 array of charged-particle detectors, in coincidence with the detection of the residual 33Si nuclei in the ZDD identification chamber at 0°. When the 33Si nucleus is populated in an excited state, it is characterized in energy through its gamma decay, detected by EXOGAM2. The CATS trackers placed upstream of the target allow for Doppler correction of the detected gamma-ray energies and, more generally, for monitoring the kinematic parameters of the observed reactions. For the purpose of calibrating the experimental setup and validating the data analysis protocol, the same (p,d) reactions were also performed using the stable primary beam of 36S, leading to the production of 35S.
Setup
| Setup | CATS + MUGAST + EXOGAM + Zero-Degree-Detection (ZDD) |
|---|
Beam(s)
| Ion(s) | Charge state | Energy | Energy unit | Av. intensity | Intensity unit | Purity (%) | Accelerator | Production |
|---|---|---|---|---|---|---|---|---|
| 36S | 16+ | 77.5 | MeV/u | 2.e+11 | pps | 100 | Stable | Cyclotrons |
| 34Si | 14+ | 50 | MeV/u | 1.5e+5 | pps | 95 | Radioactive | LISE |
| 36S | 16+ | 50 | MeV/u | 1.5e+5 | pps | 100 | Stable | Cyclotrons |
Target(s)
| Material | Thickness | Thickness unit | Sample phase | Type |
|---|---|---|---|---|
| 4Be | 1475 | μm | Solid | Isotope |
| 4Be | 1512 | μm | Solid | Isotope |
| CH2 | 5.0 | mg/cm2 | Solid | Compound |
| natC | 4 | mg/cm2 | Solid | Isotope |
Studied reaction(s)
| Name | Projectile | Target |
|---|---|---|
| 36S (50 MeV/u, q=16+, I=1.5e+5 pps) + CH2 (5.0 mg/cm2) | 36S(16+) @ 50 MeV/u | CH2 (5.0 mg/cm2) |
| 34Si (50 MeV/u, q=14+, I=1.e+5 pps) + CH2 (5 mg/cm2) | 34Si(14+) @ 50 MeV/u | CH2 (5 mg/cm2) |
| 34Si (50 MeV/u, q=14+, I=1.5e+5 pps) + natC (4 mg/cm2) | 34Si(14+) @ 50 MeV/u | natC (4 mg/cm2) |
| 36S (50 MeV/u, q=16+, I=1.5e+5 pps) + natC (4 mg/cm2) | 36S(16+) @ 50 MeV/u | natC (4 mg/cm2) |
Contributors
| Given Name | Family Name | Id. | Affiliation(s) |
|---|---|---|---|
| Valérian | Girard Alcindor |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Marlène | Assié |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Didier | Beaumel |
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
|
| Yorick | Blumenfeld |
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
|
| Simone | Bottoni |
|
(UNIMI) University of Milan, Milan, Italy
(INFN-MI) National Institute for Nuclear Physics, Milan Unit, Milan, Italy
|
| Daniele | Brugnara |
|
(INFN-LNL) National Institute for Nuclear Physics, Legnaro National Laboratories, Legnaro, Italy
|
| Wilton | Catford |
|
University of Surrey, Guildford, United Kingdom
|
| Emmanuel | Clement |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
(CNRS) French National Centre for Scientific Research, Paris, France
|
| Gilles | De France |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Nicolas | De Séréville |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Alain | Goasduff |
|
(INFN-LNL) National Institute for Nuclear Physics, Legnaro National Laboratories, Legnaro, Italy
|
| Andrea | Gottardo |
|
(INFN-LNL) National Institute for Nuclear Physics, Legnaro National Laboratories, Legnaro, Italy
|
| Faïrouz | Hammache |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Hugo | Jacob |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Shumpei | Koyama |
Grand Accélérateur National d'Ions Lourds, Caen, France
|
|
| Antoine | Lemasson |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
(CNRS) French National Centre for Scientific Research, Paris, France
|
| Daniele | Mengoni |
|
(UNIPD) University of Padua, Padua, Italy
(INFN-PD) National Institute for Nuclear Physics, Padova Division, Padua, Italy
|
| Sara | Pigliapoco |
|
(INFN-PD) National Institute for Nuclear Physics, Padova Division, Padua, Italy
|
| Elia | Pilotto |
|
(INFN-PD) National Institute for Nuclear Physics, Padova Division, Padua, Italy
(UNIPD) University of Padua, Padua, Italy
|
| Olivier | Sorlin |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Gheorghe Iulian | Stefan |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Jean-Charles | Thomas |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Luca | Zago |
|
(INFN-LNL) National Institute for Nuclear Physics, Legnaro National Laboratories, Legnaro, Italy
|
| Raquel | Nicolás del Álamo |
|
(UNIPD) University of Padua, Padua, Italy
(INFN-PD) National Institute for Nuclear Physics, Padova Division, Padua, Italy
|
| Nathan | Giha |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Dolores | Cortina Gil |
|
(UV) University of Valencia, Valencia, Spain
|
| Miguel | Lozano Gonzalez |
|
(USC) University of Santiago de Compostela, Santiago de Compostela, Spain
|
| Armand | Bahini |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Lucas | Bégué-Guillou |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Alex | Cobo Zarzuelo |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Prabhat | Sharma |
Grand Accélérateur National d'Ions Lourds, Caen, France
|
|
| Ozge | Aktas |
Grand Accélérateur National d'Ions Lourds, Caen, France
|
|
| Charlie | Paxman |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Giacomo | Corbari |
|
(UNIMI) University of Milan, Milan, Italy
(INFN-MI) National Institute for Nuclear Physics, Milan Unit, Milan, Italy
|
| Davide | Genna |
|
(UNIMI) University of Milan, Milan, Italy
(INFN-MI) National Institute for Nuclear Physics, Milan Unit, Milan, Italy
|
| Massimiliano | Luciani |
|
(UNIMI) University of Milan, Milan, Italy
(INFN-MI) National Institute for Nuclear Physics, Milan Unit, Milan, Italy
|
| Mihai | Stanoiu |
|
(IFIN-HH) Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Măgurele, Romania
|
| Florin | Rotaru |
|
(IFIN-HH) Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Măgurele, Romania
|
| Louis | Heitz |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Tania | Zanatta-Martinez |
|
Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France
|
| Laurie | Dienis |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Stefana | Calinescu |
|
(IFIN-HH) Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Măgurele, Romania
|
| Silvia | Ise |
(IFIN-HH) Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Măgurele, Romania
|
|
| Hugo | Guerin |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Louis | Lalanne |
|
IPHC Université de Strasbourg
|
| Omar | Kamalou |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Maria | Fisichella |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Sébastien | Herlant |
Grand Accélérateur National d'Ions Lourds, Caen, France
|
|
| Hemantika | Sengar |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
| Thomas | Roger |
|
Grand Accélérateur National d'Ions Lourds, Caen, France
|
Institutes
| Name | Id. |
|---|---|
| Grand Accélérateur National d'Ions Lourds, Caen, France |
|
| Laboratory of the Physics of the Two Infinities Irène Joliot-Curie, Orsay, France |
|
| (INFN-LNL) National Institute for Nuclear Physics, Legnaro National Laboratories, Legnaro, Italy |
|
| (INFN-PD) National Institute for Nuclear Physics, Padova Division, Padua, Italy |
|
| (UNIPD) University of Padua, Padua, Italy |
|
| (UNIMI) University of Milan, Milan, Italy |
|
| University of Surrey, Guildford, United Kingdom |
|
| (USC) University of Santiago de Compostela, Santiago de Compostela, Spain |
|
| (IFIC) Instituto de Física Corpuscular, Paterna, Spain |
|
| (INFN) National Institute for Nuclear Physics, Rome, Italy |
|
| (INFN-MI) National Institute for Nuclear Physics, Milan Unit, Milan, Italy |
|
| (CNRS) French National Centre for Scientific Research, Paris, France |
|
| (UV) University of Valencia, Valencia, Spain |
|
| IPHC Université de Strasbourg |
|
| (IFIN-HH) Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Măgurele, Romania |
|
Citation
e869_22 Collaboration, e869_22 GANIL dataset (2025). doi:https://doi.org/10.26143/ganil-2025-e869_22.