Properties of the 4.77- and 5.16-MeV States ofB10

Absolute resonance strengths in the $^{6,7}Li(\alpha, \gamma)^{10,11}B$ reactions

“…To improve the situation, a new experimental approach is in preparation at the 4 MV Dynamitron tandem accelerator in Bochum, called ERNA -European Recoil separator for Nuclear Astrophysics [2]. In this approach, the reaction is a corresponding author, E-mail: gyurky@atomki.hu studied in inverse kinematics, 4 He( 12 C,γ) 16 O, i.e. a 12 C ion beam is guided into a windowless 4 He gas target and the 16 O recoils are counted in a ∆E-E telescope placed in the beam line at the end of the separator, which filters the intense 12 C projectiles from the 16 O recoils.…”

“…In this approach, the reaction is a corresponding author, E-mail: gyurky@atomki.hu studied in inverse kinematics, 4 He( 12 C,γ) 16 O, i.e. a 12 C ion beam is guided into a windowless 4 He gas target and the 16 O recoils are counted in a ∆E-E telescope placed in the beam line at the end of the separator, which filters the intense 12 C projectiles from the 16 O recoils. One of the most important separator characteristics is its acceptance in angle and energy.…”

Preciseγ-ray intensity measurements in10B

“…Currently, for the T=1, 2 + state in 10 B, the width is reasonably well known [10,11], at the 7% level, the alpha-decay branch moderately well known [12,13], at the 25% level, but the γ-ray branch has several conflicting published results and the most recent data evaluation [14] reports only an upper limit of <0.5% for the transition of interest.…”

“…The width of the 5164-keV state has been measured by several authors [12,21,26] with considerable scatter between the reported values. Spear et al, [10] added a more recent determination, 400±60 meV, and recognized an error in the analysis of some earlier works, which led to a considerable improvement in consistency.…”

“…The α-decay branch has been measured in two studies. Alburger et al, [12] made a very careful study of this state following the 11 B( 3 He,α) 10 B reaction. They measured both the α-decay branch with α-α-recoil coincidences, and the γ-ray branches in α-γ coincidences.…”