The 8Be nucleus and the Hoyle state in dissociation of relativistic nuclei

Andrei Zaitsev; Denis Artemenkov; Pavel Zarubin

doi:10.54546/NaturalSciRev.200603

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Прислана: 26.12.2025; Принята: 10.02.2026; Опубликовано 11.03.2026;

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Как цитировать

А. Зайцев, Д. Артеменков, П. Зарубин. "The 8Be nucleus and the Hoyle state in dissociation of relativistic nuclei" Natural Sci. Rev. 3 200603 (2026)
https://doi.org/10.54546/NaturalSciRev.200603

А. Зайцев^1,2,a, Д. Артеменков¹, П. Зарубин^1,2

¹Объединенный институт ядерных исследований, Дубна, Россия
²Физический институт им. П.Н. Лебедева РАН, Москва, Россия

^azaicev@jinr.ru

DOI: 10.54546/NaturalSciRev.200603

Ключевые слова: Ядро 8Be, Состояние Хойла, α-фрагментация, ядерная эмульсия, релятивистские ядра

Категории: Физика , Ядерная физика (эксперимент) , 70-летие ОИЯИ

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Supplementary materials

Аннотация

Возможность регистрации в ядерной эмульсии событий фрагментации релятивистских ядер, обнаруженная еще в пионерскую эпоху физики космических лучей, открывает перспективу применения этого метода для изучения предельно холодных ансамблей ядер H и He в интересах развития физики ядерной кластеризации и, возможно, расширения сценариев ядерной астрофизики. Представлены результаты эксперимента БЕККЕРЕЛЬ в ОИЯИ по нестабильным состояниям в релятивистской диссоциации ядер в ядерной эмульсии, обеспечивающей полное детектирование фрагментов с рекордным разрешением. Согласно инвариантным массам, вычисленным на основе углов испускания идентифицируются распады ⁸Be(0⁺), ⁸Be(2⁺), ⁹Be(1.7), ⁹B, ⁶Be, ¹²С(0⁺₂) или состояние Хойла и ¹²C(3^–). Вклад ⁸Be(0⁺) и ¹²С(0⁺₂) возрастает с множественностью α-частиц. Их структура и разнообразие родительских ядер позволяет предположить слияние последних. Внедрение автоматизированной микроскопии для анализа облучений на ускорительном комплексе NICA ОИЯИ создает современную основу применения метода ядерной эмульсии.

Поддерживающие организации

While still unresolved, the condensate problem proved to be a kind of signpost leading to inspiring findings. The shift toward this topic was made possible by the influence and support of colleagues. In the 2000s, the results of the BECQUEREL experiment were presented at the EXON conferences organized by Professor Yuri Penionzhkevich (Dubna), who passed away in August 2025. At the EXON-2009 conference, he organized our discussion with Professor Wolfram von Oerzen (Berlin), who was interested in multiple α-particle generations and the observability of 8Be forks among them for condensate searches. Having included this possibility in his review, he recommended our paper to the founder of this research, Professor Peter Schuck (Orsay), at the 2nd Workshop on Nuclear Clustering in 2010. At this workshop, Professor Gerd RÅNopke (Rostock) asked about the possibility of identifying decays of the Hoyle state, which was answered affirmatively, although the nature of the process was unclear at the time. The transition to practice became possible with new nuclear emulsion samples, the production of which was initiated by Natalia Polukhina (Moscow). Thanks to the active support of Vladimir Pikalov (Protvino), they were irradiated in a carbon beam in 2016. Our initial results continued our collaboration with Sergei Kharlamov (Moscow) and Natalia Peresadko (Troitsk), using existing measurements and accumulating new ones. The data they provided from their emulsion collaborations were analyzed during the 2020–2021 lockdown period. Our presentation at the 2019 cluster meeting in Trento was made possible thanks to the support of Professor David Blaschke (Wroclaw). Thus, this review was made possible thanks to the scientific solidarity of these colleagues and the colleagues whose names are among the authors of the cited papers. We hope we have not disappointed them. Research on the BECQUEREL experiment, which began two decades ago, would not have been possible without the constant support of our research leader at JINR, Professor Aleksandr Malakhov. We express our sincere gratitude to Irina Zarubina, who proofread this extensive text, and to Svetlana Chubakova, who edited its translation.

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