Variational calculation of light nuclei using nearly orthogonal functions

Be8+Be8andCCurtis1, Aprahamian2, Ashwood3 et al. 2016Phys. Rev. C276130View full textAdd to dashboardCite

“…It is not clear, therefore, if the same, or different structures, are being populated by the two different reaction mechanisms. A number of states in the E x ( 16 O) = 17.7 to 35.1 MeV, and 6 + to (10 + ) angular momentum range, have also been seen in the 12 C( 12 C, 8 Be 8 Be) 8 Be reaction [19]. However, whilst the states observed below 25 MeV appear to lie on same band as Chevallier et al [1], those above this energy do not, and it is not clear if more than one rotational band is being populated in the reaction.…”

“…However, the 0 + member of this band, the state at 6.049 MeV, is almost 11 MeV lower in excitation than the 16.7 MeV bandhead energy of the Chevallier rotational band, and it is now well established [3] that both states are actually members of the K π = 0 + 4p-4h rotational band in 16 O. This band has additional 4 + and 6 + members at 10.356 and 16.275 MeV, respectively, and is believed to possess an α + 12 C structure (see, for example, [4][5][6][7][8][9]) with the 4 + and 2…”

“…For nearly 50 years it has been believed that a 4α linear chain state exists in 16 O, following the observation of a highly deformed rotational band in the 8 Be + 8 Be decay of this nucleus. A measurement of the 12 C( 4 He, 8 Be) 8 Be excitation function by Chevallier et al [1] indicated that a series of 2 + to 6 + resonances were populated in the 16 -21 MeV excitation energy (E x ) range.…”

“…A measurement of the 12 C( 4 He, 8 Be) 8 Be excitation function by Chevallier et al [1] indicated that a series of 2 + to 6 + resonances were populated in the 16 -21 MeV excitation energy (E x ) range. The energy -spin systematics suggested a highly deformed rotational band was being populated, the moment of inertia of which being approximately four times greater than that calculated classically for the spherical 16 O ground state.…”

“…The 12 C( 4 He, 8 Be) 8 Be excitation function has become the focus of attention again in recent years, with two new repeat measurements of the earlier Chevallier et al [1] work. The results of Soylu et al [20] show some agreement with the Chevallier data, although different 8 Be center of mass angular ranges were covered in the two experiments.…”