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SUMMARY:Cluster structure in 14C
DTSTART;VALUE=DATE-TIME:20241120T083000Z
DTEND;VALUE=DATE-TIME:20241120T084500Z
DTSTAMP;VALUE=DATE-TIME:20260421T131425Z
UID:indico-contribution-25488@indico.ific.uv.es
DESCRIPTION:Speakers: David Palacios Suárez-Bustamante (IGFAE - Universid
 ade de Santiago de Compostela)\nCluster-like structures are often present 
 in atomic nuclei and significantly influence their structural and dynamica
 l properties. More precisely\, Morinaga [1] proposed a particular alpha cl
 uster configuration known as the linear-chain cluster state (LCCS)\, in wh
 ich the alpha particles are arranged in a linear sequence. In this configu
 ration\, the neutron excess appears to play a significant role in stabiliz
 ing the structure. Suhara and Kanada-En'yo [2] were the first to predict t
 he existence of the LCCS in $^{14}$C using antisymmetrized molecular dynam
 ics (AMD). However\, it was not until 2014 that the first experimental evi
 dence was obtained by Freer *et al.* [3]\, supporting the idea of the LCCS
  in $^{14}$C by identifying the prolate band (J$^{\\pi}$ = $0^+$\, $2^+$\,
  4$^+$). Two years later\, Fritsch *et al.* [4] observed the 2$^+$ and the
  4$^+$ states\, but the position of the band head (0$^+$) remained unknown
 . Recently\, Yamaguchi *et al.* [5] reported having identified this 0$^+$ 
 state at 3 MeV\, however\, a recent work has challenged this finding [6].\
 n\nThe alpha-cluster structure of $^{14}$C has been investigated through t
 he resonance scattering in the $^{10}$Be($^{4}$He\,$^{4}$He)$^{10}$Be reac
 tion. The experiment was conducted using an active target time projection 
 chamber (AT-TPC) filled with pure He\, placed inside the solenoidal spectr
 ometer SOLARIS [7]. The standalone $^{10}$Be beam was injected into the Re
 A6 accelerator at the Facility for Rare Isotope Beams (FRIB)\, where it wa
 s accelerated and subsequently delivered to SOLARIS. Different gas pressur
 es inside the AT-TPC and different beam energies were used in order to ext
 ract as much information as possible about the different LCCS bands: the $
 \\pi$-bond and the $\\sigma$-bond. Both bands will be studied using a new 
 observable: the three-particle decay inelastic channel branching ratio.\n\
 n\n\n[1] H. Morinaga\, Interpretation of some of the excited states of 4n 
 self-conjugate nuclei\, Phys. Rev. 101 (1956) 254-258.\n\n[2] T. Suhara\, 
 Y. Kanada-En'yo\, Cluster structures of excited states in C 14\, Physical 
 Review C 82 (2010) 044301.\n\n[3] M. Freer *et al.*\, Resonances in 14C ob
 served in the 4He(10Be\,4He)10Be reaction\, Physical Review C 90 (2014) 05
 4324.\n\n[4] A. Fritsch *et al.*\, One dimensionality in atomic nuclei: A 
 candidate for linear-chain $\\alpha$ clustering in C 14\, Physical Review 
 C 93 (2016) 014321.\n\n[5] H. Yamaguchi *et al.*\, Experimental investigat
 ion of a linear-chain structure in the nucleus 14C\, Physics Letters\, Sec
 tion B: Nuclear\, Elementary Particles and High-Energy Physics 766 (2017) 
 11-16.\n\n[6] J. Han *et al.*\, Nuclear linear-chain structure arises in c
 arbon-14. *Commun Phys* **6**\, 220 (2023).\n\n[7] https://www.anl.gov/phy
 /solaris.\n\n\n\n\n\n*This work is supported by the Xunta de Galicia (CIGU
 S Network of Research Centres) and the European Union.*\n\nhttps://indico.
 ific.uv.es/event/7664/contributions/25488/
LOCATION:
URL:https://indico.ific.uv.es/event/7664/contributions/25488/
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