Benjamin Asher

Area of research

Nuclear and High Energy Physics · Radiation

Research interest

Research topics from publications: Observation of a Near-Threshold Proton Resonance in B11; Experimental study of the F17+C12 fusion reaction and its implications for fusion of proton-halo systems; The Encore active target detector: A Multi-Sampling Ionization Chamber; Resolution of a long-standing discrepancy in the $$^{17}$$O$$+^{12}$$C fusion excitation function; Low-lying resonances in Si26 relevant for the determination of the astrophysical Al25(p,γ<mml; Development of an Isomeric beam of26Al for nuclear reaction studies; Characterization of the CATRiNA neutron detector system; Experimental study of the Nam24(d,p)Na25 reaction and implications for the influence of the <m; Characterization and description of a spectrum unfolding method for the CATRiNA neutron detector array; Experimental study of the isomeric state in N16 using the Ng,m16</. Representative work: A near-threshold proton resonance in $^{11}\mathrm{B}$ at ${E}_{\mathrm{ex}}=11.44\ifmmode\pm\else\textpm\fi{}0.04\text{ }\text{ }\mathrm{MeV}$ is observed via the reaction $^{10}\mathrm{Be}(d,n)^{11}\mathrm{Be}\ensuremath{\rightarrow}^{10}\mathrm{Be}+p$ in inverse kinematics, measured with a beam of the radioactive isotope $^{10}\mathrm{Be}$. The resonance energy at ${E}_{\mathrm{res}}=211(40)\text{ }\text{ }\mathrm{keV}$ is consistent with a proton signal observed by Ayyad et al. in the $\ensuremath{\beta}$-delayed proton decay of $^{11}\mathrm{Be}$. By comparison to a distorted wave Born approximation calculation, a 0.27(6) spectroscopic factor is extracted and a tentative ($\ensuremath{\ The total fusion cross section for the $^{17}\mathrm{F}+^{12}\mathrm{C}$ system at incident energies near the top of the Coulomb barrier was studied using the newly developed Encore active-target detector at Florida State University. The $^{17}\mathrm{F}$ nucleus exhibits interesting nuclear structure properties in that although it has a low threshold against $^{17}\mathrm{F}\ensuremath{\rightarrow}^{16}\mathrm{O}+p$ breakup $({S}_{p}=600\phantom{\rule{0.28em}{0ex}}\mathrm{keV})$, the valence proton is in the $1{d}_{5/2}$ shell in the ground state so that the nuclear matter radius is predicted to be similar to that of the $^{16}\mathrm{O}$ core. By contrast, the low-lying $1/{2}^{+}$ first e

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