Decay angular correlations and spectroscopy for10Be*→4<

Molecular structures inT=1states of10B

“…at excitation energies of interest due to small penetrability factors. The same is true for the decay into 8 Be and the p-n singlet state. The reduced width amplitudes were constrained in the R-matrix fit by requiring that corresponding proton and neutron reduced width amplitudes are equal, as determined by the isospin Clebsch-Gordon coefficients for the T=1 states.…”

“…partial widths in this resonance [17]. Another isospin violating channel is deuteron decay to the ground state of 8 Be.…”

“…It is well established that the low-lying states in 8 Be can be described as a two-center α-α structure [1]. Recent ab initio Green's Function Monte Carlo calculations explicitly show how this structure emerges naturally for the 8 Be ground state [2].…”

“…A state at excitation energy of 10.2 MeV was first observed in the 7 Li(α,p) reaction [6] and then in 7 Li( 7 Li,α) where it was found that the main decay channel for this state is α+ 6 He [7]. The spin-parity of this state was first determined in [8] using angular correlations between the 7 Li( 7 Li,α 6 He)α reaction products and was found to be 3 − (excitation energy of this state was revised to 10.15 MeV). This would clearly disqualify the 10.15 MeV state as a member of the highly deformed K π =0 + rotational band.…”

Observation ofαdecay from a state in10B at 11.48 MeV

“…We note that the spin-parity of the 10.15-MeV state remains somewhat controversial. It was first found to be 3 − [4,5], but two more recent measurements [6,7] both favor a 4 + assignment.…”