2021 Fiscal Year Annual Research Report
Elucidation of the r-process second peak from key nuclear mass measurements at N=82 with the Rare-RI Ring at RIKEN/RIBF
| Project/Area Number |
19K03901
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
Naimi Sarah 国立研究開発法人理化学研究所, 開拓研究本部, 研究員 (40747135)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | r-process / Mass Measurement / storage ring / position detector |
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| Outline of Annual Research Achievements |
We succeeded mass measurements of neutron rich nuclei with the Rare-RI Ring for the elucidation of the r-process abundances. The final result were recently published in Physical Review Letter.
The new mass value of 123Pd that was used in astrophysical calculation of neutron start merger event, resulted in the reproduction of solar
r-process abundance for the ratio of masses A=122 and A=123.
We have also finalized the development of new type of position-sensitive detector and a publication summarizing the achievement is under preparation. The resolution of the detector is almost similar to that of the standard RIBF position diagnostics detectors with the advantage of being usable under the high vacuum condition inside the Rare-RI Ring.
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| Remarks |
Press release of research achievement
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