Unexpected spin-parity assignments of the excited states inBe9

Be9elastic scattering onPb208andAlCasal1, Rodríguez‐Gallardo2, Arias3 2015Phys. Rev. C347400View full textAdd to dashboardCite

“…The low-energy spectrum of 9 Be shows several resonances with angular momenta j π = 1/2 + , 5/2 − , 1/2 − , 5/2 + , 3/2 + and possibly others, whose positions and widths have been investigated by many authors in different experiments [30][31][32]. The spin-parity assignment for some of these states is still under discussion [33], although there are no implications for the lowest 1/2 + and 5/2 − resonances. We describe the states of the system using the analytical THO method.…”

Structures of the excited states in $$^{9}$$Be studied by scattering of 23 MeV deuterons

“…The nucleus 9 Be is an excellent object for studying the phenomenon of clustering in nuclei. Until recently, it was believed that the structure of 9 Be has been studied quite well.…”

“…The nucleus 9 Be is an excellent object for studying the phenomenon of clustering in nuclei. Until recently, it was believed that the structure of 9 Be has been studied quite well. In the 9 Be nucleus, the following cluster structures are assumed: 8 Be + n and 4 He + 5 He [1][2][3].…”

“…Until recently, it was believed that the structure of 9 Be has been studied quite well. In the 9 Be nucleus, the following cluster structures are assumed: 8 Be + n and 4 He + 5 He [1][2][3]. Each possible pair in it ( 8 Be and 5 He) is unbound, but together form a stable three-body system, that is so called Borromean structure.…”

“…One of the unusual properties of the 9 Be nucleus was the observation of the neutron halo in the first excited state of 1.68 MeV, 1 2 + . Many studies are devoted to this state (for example, [3][4][5]) where questions about structure of this state and the exact excitation energy were raised.…”