The electromagnetic dipole strength of the nucleus Ba-136 has been investigated. Two measurements were performed with electron energies of 7.0 and 11.4 MeV at the bremsstrahlung facility at the ELBE accelerator of the Helmholtz-Zentrum Dresden-Rossendorf. Photon scattering experiments on the same nucleus have been performed at the high-intensity gamma-ray source (HI gamma S) facility of the Triangle Universities Nuclear Laboratory between 4.7 and 9.3 MeV. The GEANT4 code has been used to determine detector response and non-nuclear scattered events. Thus it is possible to account for the dipole strength in the quasicontinuum of unresolvable transitions. A statistical code was used to simulate inelastic transitions and to determine the branching ratios of transitions to the ground state. The resulting photoabsorption cross section is compared to quasiparticle random-phase approximation and relativistic quasiparticle time blocking approximation calculations.

The 14 N(p,γ) 15 O reaction is the slowest reaction of the carbon-nitrogen-oxygen cycle of hydrogen burning in stars. As a consequence, it determines the rate of the cycle. The 15 N(p,αγ) 12 C reaction is frequently used in inverse kinematics for hydrogen depth profiling in materials. The 14 N(p,γ) 15 O and 15 N(p,αγ) 12 C reactions have been studied simultaneously, using titanium nitride targets of natural isotopic composition and a proton beam. The strengths of the resonances at Ep = 1058 keV in 14 N(p,γ) 15 O and at E p = 897 and 430 keV in 15 N(p,αγ) 12 C have been determined with improved precision, relative to the well-known resonance at E p = 278 keV in 14 N(p,γ) 15 O. The new recommended values are ωγ = 0.353 ± 0.018, 362 ± 20, and 21.9 ± 1.0 eV for their respective strengths. In addition, the branching ratios for the decay of the E p = 1058 keV resonance in 14 N(p,γ) 15 O have been redetermined. The data reported here should facilitate future studies of off-resonant capture in the 14 N(p,γ) 15 O reaction that are needed for an improved R-matrix extrapolation of the cross section. In addition, the data on the 430 keV resonance in 15 N(p,αγ) 12 C may be useful for hydrogen depth profiling.

The N-14(p,gamma)O-15 reaction is the slowest reaction of the carbon-nitrogen-oxygen cycle of hydrogen burning in stars. As a consequence, it determines the rate of the cycle. The N-15(p,alpha gamma)C-12 reaction is frequently used in inverse kinematics for hydrogen depth profiling in materials. The N-14(p,gamma)O-15 and N-15(p,alpha gamma)C-12 reactions have been studied simultaneously, using titanium nitride targets of natural isotopic composition and a proton beam. The strengths of the resonances at E-p = 1058 keV in N-14(p,gamma)O-15 and at E-p = 897 and 430 keV in N-15(p,alpha gamma)C-12 have been determined with improved precision, relative to the well-known resonance at Ep = 278 keV in N-14(p,gamma)O-15. The new recommended values are omega gamma = 0.353 +/- 0.018, 362 +/- 20, and 21.9 +/- 1.0 eV for their respective strengths. In addition, the branching ratios for the decay of the E-p = 1058 keV resonance in N-14(p,gamma)O-15 have been redetermined. The data reported here should facilitate future studies of off-resonant capture in the N-14(p,gamma)O-15 reaction that are needed for an improved R-matrix extrapolation of the cross section. In addition, the data on the 430 keV resonance in N-15(p,alpha gamma)C-12 may be useful for hydrogen depth profiling.

The $^{14}\mathrm{N}$($p,\ensuremath{\gamma}$)$^{15}\mathrm{O}$ reaction is the slowest reaction of the carbon-nitrogen-oxygen cycle of hydrogen burning in stars. As a consequence, it determines the rate of the cycle. The $^{15}\mathrm{N}$($p,\ensuremath{\alpha}\ensuremath{\gamma}$)$^{12}\mathrm{C}$ reaction is frequently used in inverse kinematics for hydrogen depth profiling in materials. The $^{14}\mathrm{N}$($p,\ensuremath{\gamma}$)$^{15}\mathrm{O}$ and $^{15}\mathrm{N}$($p,\ensuremath{\alpha}\ensuremath{\gamma}$)$^{12}\mathrm{C}$ reactions have been studied simultaneously, using titanium nitride targets of natural isotopic composition and a proton beam. The strengths of the resonances at ${E}_{p}$ $=$ $1058$ keV in $^{14}\mathrm{N}$($p$,$\ensuremath{\gamma}$)$^{15}\mathrm{O}$ and at ${E}_{p}$ $=$ $897$ and $430$ keV in $^{15}\mathrm{N}$($p$,$\ensuremath{\alpha}\ensuremath{\gamma}$)$^{12}\mathrm{C}$ have been determined with improved precision, relative to the well-known resonance at ${E}_{p}$ $=$ $278$ keV in $^{14}\mathrm{N}$($p$,$\ensuremath{\gamma}$)$^{15}\mathrm{O}$. The new recommended values are $\ensuremath{\omega}\ensuremath{\gamma}=0.353\ifmmode\pm\else\textpm\fi{}0.018$, $362\ifmmode\pm\else\textpm\fi{}20$, and $21.9\ifmmode\pm\else\textpm\fi{}1.0$ eV for their respective strengths. In addition, the branching ratios for the decay of the ${E}_{p}$ $=$ $1058$ keV resonance in $^{14}\mathrm{N}$($p$,$\ensuremath{\gamma}$)$^{15}\mathrm{O}$ have been redetermined. The data reported here should facilitate future studies of off-resonant capture in the $^{14}\mathrm{N}$($p$,$\ensuremath{\gamma}$)$^{15}\mathrm{O}$ reaction that are needed for an improved $R$-matrix extrapolation of the cross section. In addition, the data on the $430$ keV resonance in $^{15}\mathrm{N}$($p$,$\ensuremath{\alpha}\ensuremath{\gamma}$)$^{12}\mathrm{C}$ may be useful for hydrogen depth profiling.