2023 Fiscal Year Research-status Report
| Project/Area Number |
23KF0125
|
|---|
| Research Institution | Institute of Physical and Chemical Research |
|---|
Principal Investigator |
大津 秀暁 国立研究開発法人理化学研究所, 仁科加速器科学研究センター, チームリーダー (90302075)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
LEMARIE JULIEN 国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 外国人特別研究員
|
|---|
| Project Period (FY) |
2023-07-26 – 2026-03-31
|
| Keywords | Unstable nuclei / Gamma ray spectroscopy / Dipole response |
|---|
| Outline of Annual Research Achievements |
The data analysis of the experiment 50Ca+Pb done at RIKEN -RIBF in 2017 is undergoing. The reaction cross-section for the production of 48Ca has been determined. The detectors are fully calibrated, the calibration has been verified, and the data is ready for the physics analysis.
The gamma-ray array CATANA has been prepared and used during the April 2024 experiments. CATANA has been operated with two different gain: the normal output of photomultiplier for gamma-ray measurement, and the first dynode output for proton energy measurement; data from each output has been recorded with independent acquisition electronics. For the first time, CATANA was running with 2 gain for all of its detectors. We have successfully verified correlation of both electronics with the rest of the detectors, and observed proton-proton correlation emitted in opposite direction.
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The data analysis has been a bit delayed due to verification for the neutron detection, but overall progress has been smooth.
Malfunctioning detectors of CATANA has been repaired before the experiments in April 2024, and it thus have been running with 140 x2 working channels. Analysis programs have been prepared before hand, and has been improved during the experiments and correlation between every detectors of the experiments and CATANA could be seen while the experiment was running.
|
| Strategy for Future Research Activity |
Using a simulation, the efficiencies of every detectors of the 2017 experiment will be determined, and will be used to determine the cross-section spectra.
An other simulation will be made with the 50Ca fully simulated with theoretical model. This simulation and the experimental data will be compared in order to probe the dipole resonance of the 50Ca.
New detectors will be mounted on CATANA in the coming year to improve its angle coverage.
|
| Causes of Carryover |
The majority of this fiscal year's budget has been utilized. For the next fiscal year, we plan to join several international conferences as oral presentation. Therefore, the unspent portion from this fiscal year will be allocated towards those conferences, hence carried over to the next fiscal year.
|
