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Дата издания
01.07.2022На каком языке издана
ISSN
2469-9985Область исследования
Тип исследования
Аннотация (краткое описание)
Charge-changing cross sections σCC for Ca42-51 on a carbon target at around 280 MeV/nucleon have been measured. Though the existing point-proton radii rp of Ca isotopes increase as the neutron number increases, the measured σCC data show a significant decrease, which is against the expectation from a simple Glauber-like model. We found that this observed phenomenon could be attributed to the charged-particle evaporation effect induced by the neutron-removal reaction. By taking the evaporation effect into account, various σCC data sets for nuclides from C to Fe isotopes on C12 measured at around 280 MeV/nucleon are reproduced with a standard deviation of 1.6%. It is also clarified that this evaporation effect becomes negligibly small in the neutron-rich region. The evaluated relation between σCC and rp using the current model indicates that σCC data for neutron-rich Ca isotopes (A≥51) are highly sensitive to rp. This high sensitivity potentially allows one to determine the rp of very neutron-rich nuclei. © 2022 American Physical Society.DOI
10.1103/PhysRevC.106.014617Тип публикаций
Практическое значение
The study demonstrates that the charged-particle evaporation effect must be taken into account when analyzing charge-changing cross sections (σCC). Considering this effect significantly improves the accuracy of determining nuclear sizes, particularly the proton radius (r p ). The proposed approach is especially valuable for investigating very neutron-rich calcium isotopes, where direct measurements are difficult. Therefore, the results provide a reliable method for studying the structure of exotic nuclei and contribute to the advancement of nuclear physics research.Квартиль
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SCImago (Scopus)Impact Factor
5.7Количество цитирований
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Charge-changing cross sections.pdf