論文

2021年1月15日

Formation of α clusters in dilute neutron-rich matter

Science
  • Junki Tanaka
  • ,
  • Zaihong Yang
  • ,
  • Stefan Typel
  • ,
  • Satoshi Adachi
  • ,
  • Shiwei Bai
  • ,
  • Patrik van Beek
  • ,
  • Didier Beaumel
  • ,
  • Yuki Fujikawa
  • ,
  • Jiaxing Han
  • ,
  • Sebastian Heil
  • ,
  • Siwei Huang
  • ,
  • Azusa Inoue
  • ,
  • Ying Jiang
  • ,
  • Marco Knösel
  • ,
  • Nobuyuki Kobayashi
  • ,
  • Yuki Kubota
  • ,
  • Wei Liu
  • ,
  • Jianling Lou
  • ,
  • Yukie Maeda
  • ,
  • Yohei Matsuda
  • ,
  • Kenjiro Miki
  • ,
  • Shoken Nakamura
  • ,
  • Kazuyuki Ogata
  • ,
  • Valerii Panin
  • ,
  • Heiko Scheit
  • ,
  • Fabia Schindler
  • ,
  • Philipp Schrock
  • ,
  • Dmytro Symochko
  • ,
  • Atsushi Tamii
  • ,
  • Tomohiro Uesaka
  • ,
  • Vadim Wagner
  • ,
  • Kazuki Yoshida
  • ,
  • Juzo Zenihiro
  • ,
  • Thomas Aumann

371
6526
開始ページ
260
終了ページ
264
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1126/science.abe4688

The surface of neutron-rich heavy nuclei, with a neutron skin created by excess neutrons, provides an important terrestrial model system to study dilute neutron-rich matter. By using quasi-free α cluster- knockout reactions, we obtained direct experimental evidence for the formation of α clusters at the surface of neutron-rich tin isotopes. The observed monotonous decrease of the reaction cross sections with increasing mass number, in excellent agreement with the theoretical prediction, implies a tight interplay between α-cluster formation and the neutron skin. This result, in turn, calls for a revision of the correlation between the neutron-skin thickness and the density dependence of the symmetry energy, which is essential for understanding neutron stars. Our result also provides a natural explanation for the origin of α particles in α decay.

リンク情報
DOI
https://doi.org/10.1126/science.abe4688
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/33446551
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85099985556&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85099985556&origin=inward
ID情報
  • DOI : 10.1126/science.abe4688
  • ISSN : 0036-8075
  • eISSN : 1095-9203
  • PubMed ID : 33446551
  • SCOPUS ID : 85099985556

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