Spectroscopic utility of the two-proton pickup (Li6,B

Dominance ofS01Proton-Pair Emission in theOnderwater1, Allaart2, Aschenauer3 et al. 1997Phys. Rev. Lett.532230View full textAdd to dashboardCite

“…The gross features of the E x spectrum at low-excitation energy can be interpreted analogously to those of the E m spectrum measured with the 12 C͑e, e 0 pp͒ reaction at about the same values for the energy and momentum transfer [8]. The estimated centroid energies of the cross sections for ͑1p͒ 2 , (1p,1s), and ͑1s͒ 2 knockout in the 16 O͑e, e 0 pp͒ reaction are E x 10, 30, and 50 MeV, respectively.…”

“…This is due to the achieved energy resolution of about 4.5 MeV at FWHM and to the statistical accuracy of the data. In the 16 O͑ 6 Li, 8 B͒ 14 C two-proton pickup reaction [12] and the 16 O͑p, t͒ 14 O two-neutron pickup reaction [13], leading to isobaric analog states, strong transitions have been observed to the ground state and two 2 1 states at excitation energies of 7.0 and 8.3 MeV. The structure of the missing-energy spectrum around 7.7 MeV is in agreement with the presence of the latter two transitions, although the peaks cannot be separated.…”

Neutron widths and configuration mixing inBe11

“…Presumably most of the remaining strength is 10 Be(2 + )×2s 1/2 . The width of 102 (14) keV, combined with the = 2 sp width of 175 keV, gives a spectroscopic factor of S = / sp = 0.58 (8). Values from (d,p) are similar: S = 0.50 in Ref.…”

“…Following β decay its BR for 2 + decay is given [13] as (2 + )/ tot = 0.78 +0.65 −0.31 . In the 9 Be( 16 O, 14 O) reaction [20], this ratio is 0.54 (7), though this state is not resolved from the 3.89-MeV state. In 9 Be(t,p) the 3.89-MeV state is approximately half as strong (angle-integrated cross sections) as 3.96 MeV.…”

3+and2+states inBeMiljanić1 2004Phys. Rev. C6031View full textAdd to dashboardCite

“…Clear ᐉ = 1 angular distribution of the 11 B͑d, 3 He͒ 10 Be reaction involving this state [10] narrows it to 2 + . The same assignment is supported by its strong feeding in the 10 B͑d, 2 He͒ and 10 B͑ − , ␥͒ reactions [11,12], which favor transitions involving spin flip, as well as in the ͑ 12 C, 14 O͒ and other two-proton pickup reactions on 12 C [13][14][15][16]. The same values of spin and parity resulted from an analysis of measured angular correlations of the 6 Li͑ 7 Li, ␣ 6 Li͒ 3 He and 7 Li͑ 7 Li, ␣ 6 He͒ 4 He reactions [6], although one may have some reservations on the applicability of this method to the processes involving nonzero-spin nuclei.…”