Resolving the $${}^{11}\hbox {B}{(p,\alpha _{0})}$$ cross-section discrepancies between 0.5 and 3.5 MeV

Münch, M.; Kirsebom, O. S.; Swartz, J. A.; Fynbo, H. O. U.

doi:10.1140/epja/s10050-019-00016-8

Cited by 10 publications

(12 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, multiple, short measurements were performed across the energy range 0.5-3.5 MeV as reported in Ref. [8].…”

Section: Methodsmentioning

confidence: 99%

“…The target consisted of a layer of 12.6(1.2) µg/cm 2 isotope-enriched 11 B deposited on a 4 µg/cm 2 carbon backing [8]. The target was manufactured from 99% enriched 11 B by slow evaporation in a Cu crucible.…”

Section: Methodsmentioning

confidence: 99%

“…The detection efficiency depends on the 3α breakup mechanism and differs significantly between breakups that do and do not proceed via the ground state (g.s.) of 8 Be. The green and magenta (short-and long-dashed) curves in the lower panels of Figures 4 and 5 show the detection efficiencies determined from Monte-Carlo simulations.…”

Section: Cross Sectionsmentioning

confidence: 95%

“…The diagonal lines from the lower left to the upper right represent breakups that proceed by α decay to the ground state of 8 Be. Owing to parity and angular momentum conservation this decay mechanism is only allowed for natural-parity levels in 12 C. The two α particles from the subsequent breakup of 8 Be, detected in coincidence with the primary α particle, form a broad band running from left to right with half the slope of the upper diagonal. The positions of known levels in 12 C are indicated on the scatter plots.…”

Section: Event Selectionmentioning

confidence: 99%

“…The p+ 11 B reaction has been extensively used to study the excitation structure of the 12 C nucleus. This includes measurement of proton widths Γ p , the partial γ widths Γ γ0 and Γ γ1 to the two lowest levels in 12 C, and the partial α widths Γ α0 and Γ α1 to the two lowest levels in 8 Be [1,2,3]. The focus of the present work are the two isospin T = 1 resonances occurring at proton energies of E p = 2.00 MeV and 2.64 MeV which correspond to the levels 17.76, 0 + and 18.85, 3 − .…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Experimental study of the $^{11}\text{B}(p,3α)γ$ reaction at $E_p = 0.5-2.7$ MeV

Kirsebom,

Howard,

Munch

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

Our understanding of the low-lying resonance structure in 12 C remains incomplete. We have used the 11 B(p, 3α)γ reaction at proton energies of E p = 0.5-2.7 MeV as a selective probe of the excitation region above the 3α threshold in 12 C. Transitions to individual levels in 12 C were identified by measuring the 3α final state with a compact array of charged-particle detectors. Previously identified transitions to narrow levels were confirmed and new transitions to broader levels were observed for the first time. Here, we report cross sections, deduce partial γ-decay widths and discuss the relative importance of direct and resonant capture mechanisms.

show abstract

“…Additionally, multiple, short measurements were performed across the energy range 0.5-3.5 MeV as reported in Ref. [8].…”

Section: Methodsmentioning

confidence: 99%