Spectroscopy of the heavy lithium isotopes 10-12Li

Structure of13Be probed via secondary-beam reactions

“…Indeed, as is well evidenced by attempts [41][42][43] to locate the now well-known threshold ν2s 1/2 state in 10 Li, it is extremely difficult to populate such states in this manner. In addition, given that stopped pion-absorption reactions do not appear to readily populate ℓ=0 states [44] and the preliminary report of a resonance 0.65±0.10 MeV above threshold in the 14 C(π − ,p) reaction [38], it may be concluded that there is quite probably a 1/2 − level around 0.8 MeV above threshold. It is worthwhile noting that, as opposed to the 12 Be+n invariant mass studies, which can be influenced by bound excited states of the 12 Be fragment, missing mass measurements provide unambiguous determinations of the 13 Be energies.…”

Selective population of unbound states in 10Li

“…This placed the first measured unbound state at 0.8 ± 0.25 MeV decay energy [8]. The next measurement was made 15 years later [9] and since then, there have been many measurements of energies of the continuum structure of 10 Li [4,5,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]34].…”

“…Both Gornov's 1998 paper [30] and Santi's 2003 paper [21] found two possible fits for the data; the fit results that used two resonances rather than one are shown here. Two different measurements in Chernyshev's 2013 paper produced two different measurements of 0.7 ± 0.05 and 0.78 ± 0.15 MeV, here the weighted average is used [28].…”