@article{buckner_wu_henderson_bucher_wimer_chyzh_bredeweg_baramsai_couture_jandel_et al._2017, title={Comprehensive Am-242m neutron-induced reaction cross sections and resonance parameters}, volume={95}, ISSN={["2469-9993"]}, DOI={10.1103/physrevc.95.061602}, abstractNote={The 242 Am metastable isomer’s neutron-induced destruction mechanisms were studied at the Los Alamos Neutron Science Center using the Detector for Advanced Neutron-Capture Experiments array with a compact parallel-plate avalanche counter. New 242m Am neutron-capture cross sections were determined from 100 meV to 10 keV, and the absolute scale was set with respect to a concurrent measurement of the well-known 242m Am neutron-induced-fission cross section. The new fission cross section spans an energy range from 100 meV to 1 MeV and was normalized to the ENDF/B-VII.1 evaluated cross section to set the absolute scale. Our 242m Am(n,f) cross section agrees well with the Browne et al. (1984) cross section over this large energy interval. The new neutron-capture cross section measurement complements and agrees well with our recent results reported below 1 eV in Buckner et al. (2017). This new work comprises the most comprehensive study of 242m Am(n, γ ) above thermal energy. Neutron-induced resonance energies and parameters were deduced with the sammy R -matrix code for incident neutron energies up to 45 eV, and the new average Γ γ is 13% higher than the evaluated average γ width.}, number={6}, journal={PHYSICAL REVIEW C}, author={Buckner, M. Q. and Wu, C. Y. and Henderson, R. A. and Bucher, B. and Wimer, N. and Chyzh, A. and Bredeweg, T. A. and Baramsai, B. and Couture, A. and Jandel, M. and et al.}, year={2017}, month={Jun} }
 @article{ullmann_kawano_baramsai_bredeweg_couture_haight_jandel_o'donnell_rundberg_vieira_et al._2017, title={Constraining the calculation of U-234,U-236,U-238(n,gamma) cross sections with measurements of the gamma-ray spectra at the DANCE facility}, volume={96}, ISSN={["2469-9993"]}, DOI={10.1103/physrevc.96.024627}, abstractNote={The cross section for neutron capture in the continuum region has been difficult to calculate accurately. Previous results for $^{238}\mathrm{U}$ show that including an $M1$ scissors-mode contribution to the photon strength function resulted in very good agreement between calculation and measurement. This paper extends that analysis to $^{234,236}\mathrm{U}$ by using $\ensuremath{\gamma}$-ray spectra measured with the Detector for Advanced Neutron Capture Experiments (DANCE) at the Los Alamos Neutron Science Center to constrain the photon strength function used to calculate the capture cross section. Calculations using a strong scissors-mode contribution reproduced the measured $\ensuremath{\gamma}$-ray spectra and were in excellent agreement with the reported cross sections for all three isotopes.}, number={2}, journal={PHYSICAL REVIEW C}, author={Ullmann, J. L. and Kawano, T. and Baramsai, B. and Bredeweg, T. A. and Couture, A. and Haight, R. C. and Jandel, M. and O'Donnell, J. M. and Rundberg, R. S. and Vieira, D. J. and et al.}, year={2017}, month={Aug} }
 @article{valenta_baramsai_bredeweg_couture_chyzh_jandel_kroll_krticka_mitchell_o'donnell_et al._2017, title={Examination of photon strength functions for Dy-162,Dy-164 from radiative capture of resonance neutrons}, volume={96}, ISSN={["2469-9993"]}, DOI={10.1103/physrevc.96.054315}, abstractNote={The $\ensuremath{\gamma}$ rays following radiative neutron capture on $^{161,163}\mathrm{Dy}$ targets were measured with the highly segmented $\ensuremath{\gamma}$-ray calorimeter Detector for Advanced Neutron Capture Experiments at the Los Alamos Neutron Science Center. The $\ensuremath{\gamma}$-ray energy spectra for different multiplicities were gathered for tens of $s$-wave resonances of both possible spins in each nucleus. Analysis of these spectra within the statistical model enabled us to draw conclusions about dipole photon strength functions with emphasis on the scissors mode. The photon strength functions best describing Dy data are very similar to previously published results on even-even Gd isotopes. It was shown that the scissors mode plays a significant role in the decay of highly excited states up to the neutron separation energy. Measurement of multiple resonances allowed us to assess the fluctuations of experimental spectra and to compare the fluctuations with simulated ones. The size of measured fluctuations is on average smaller than predicted from simulations. However, the results are puzzling as the difference between simulations within the statistical model and experiment is not consistent for both nuclei.}, number={5}, journal={PHYSICAL REVIEW C}, author={Valenta, S. and Baramsai, B. and Bredeweg, T. A. and Couture, A. and Chyzh, A. and Jandel, M. and Kroll, J. and Krticka, M. and Mitchell, G. E. and O'Donnell, J. M. and et al.}, year={2017}, month={Nov} }
 @article{buckner_wu_henderson_bucher_wimer_chyzh_bredeweg_baramsai_couture_jandel_et al._2017, title={Measurement of the Am-242m neutron-induced reaction cross sections}, volume={95}, ISSN={["2469-9993"]}, DOI={10.1103/physrevc.95.024610}, abstractNote={The neutron-induced reaction cross sections of $^{242m}\mathrm{Am}$ were measured at the Los Alamos Neutron Science Center using the Detector for Advanced Neutron-Capture Experiments array along with a compact parallel-plate avalanche counter for fission-fragment detection. A new neutron-capture cross section was determined, and the absolute scale was set according to a concurrent measurement of the well-known $^{242m}\mathrm{Am}(n,f)$ cross section. The ($n,\ensuremath{\gamma}$) cross section was measured from thermal energy to an incident energy of 1 eV at which point the data quality was limited by the reaction yield in the laboratory. Our new $^{242m}\mathrm{Am}$ fission cross section was normalized to ENDF/B-VII.1 to set the absolute scale, and it agreed well with the ($n,f$) cross section reported by Browne et al. (1984) from thermal energy to 1 keV. The average absolute capture-to-fission ratio was determined from thermal energy to ${E}_{n}=0.1$ eV, and it was found to be 26(4)$%$ as opposed to the ratio of $19%$ from the ENDF/B-VII.1 evaluation.}, number={2}, journal={PHYSICAL REVIEW C}, author={Buckner, M. Q. and Wu, C. Y. and Henderson, R. A. and Bucher, B. and Wimer, N. and Chyzh, A. and Bredeweg, T. A. and Baramsai, B. and Couture, A. and Jandel, M. and et al.}, year={2017}, month={Feb} }
 @article{buckner_wu_henderson_bucher_chyzh_bredeweg_baramsai_couture_jandel_mosby_et al._2016, title={Absolute measurement of the Pu-242 neutron-capture cross section}, volume={93}, number={4}, journal={Physical Review C}, author={Buckner, M. Q. and Wu, C. Y. and Henderson, R. A. and Bucher, B. and Chyzh, A. and Bredeweg, T. A. and Baramsai, B. and Couture, A. and Jandel, M. and Mosby, S. and et al.}, year={2016} }
 @article{wu_chyzh_kwan_henserson_bredeweg_haight_hayes-sterbenz_lee_o'donnell_ullmann_2016, title={Total prompt gamma-ray emission in fission}, volume={122}, ISSN={["2100-014X"]}, DOI={10.1051/epjconf/201612201011}, abstractNote={The total prompt γ-ray energy distributions were measured for the neutron-induced fission of 235 U, 239,241 Pu at incident neutron energy of 0.025 eV–100 keV, and the spontaneous fission of 252 Cf using the Detector for Advanced Neutron Capture Experiments (DANCE) array in coincidence with the detection of fission fragments by a parallel-plate avalanche counter. Corrections were made to the measured distribution by unfolding the two-dimension spectrum of total prompt γ-ray energy vs multiplicity using a simulated DANCE response matrix. A summary of this work is presented with the emphasis on the comparison of total prompt fission γ-ray energy between our results and previous ones. The mean values of the total prompt γ-ray energy ⟨Eγ,tot⟩, determined from the unfolded distributions, are ∼20% higher than those derived from measurements using single γ-ray detector for all the fissile nuclei studied.}, journal={CNR*15 - 5TH INTERNATIONAL WORKSHOP ON COMPOUND-NUCLEAR REACTIONS AND RELATED TOPICS}, author={Wu, C. Y. and Chyzh, A. and Kwan, E. and Henserson, R. A. and Bredeweg, T. A. and Haight, R. C. and Hayes-Sterbenz, A. C. and Lee, H. Y. and O'Donnell, J. M. and Ullmann, J. L.}, year={2016} }
 @article{walker_krticka_baramsai_becvar_bredeweg_chyzh_haight_jandel_kroll_mitchell_et al._2015, title={Measurement of the Mo-97(n,gamma) reaction with the DANCE gamma calorimeter array}, volume={92}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.92.014324}, abstractNote={Spectra of $\ensuremath{\gamma}$ rays following the $^{97}\mathrm{Mo}(n,\ensuremath{\gamma})$ reaction were measured as a function of incident neutron energy with the DANCE (Detector for Advanced Neutron Capture Experiments) array of $160 {\mathrm{BaF}}_{2}$ scintillation detectors at the Los Alamos Neutron Science Center using an enriched $^{97}\mathrm{Mo}$ target. These spectra were used for the assignment of spins of the $^{97}\mathrm{Mo}$ resonances up to neutron energy ${E}_{n}=1.7$ keV, as well as in the study of photon strength functions (PSFs) in $^{98}\mathrm{Mo}$. Analysis of the spectra with the nuclear statistical model showed that they can be well reproduced with the same PSF models which well described the $\ensuremath{\gamma}$ decay following slow neutron capture in $^{95}\mathrm{Mo}$. On the other hand, the spectra are inconsistent with PSFs describing some other experimental data in $^{98}\mathrm{Mo}$.}, number={1}, journal={PHYSICAL REVIEW C}, author={Walker, C. L. and Krticka, M. and Baramsai, B. and Becvar, F. and Bredeweg, T. A. and Chyzh, A. and Haight, R. C. and Jandel, M. and Kroll, J. and Mitchell, G. E. and et al.}, year={2015}, month={Jul} }
 @article{kroll_baramsai_mitchell_agvaanluvsan_becvar_bredeweg_chyzh_couture_dashdorj_haight_et al._2013, title={Strength of the scissors mode in odd-mass Gd isotopes from the radiative capture of resonance neutrons}, volume={88}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.88.034317}, abstractNote={Radiative neutron capture reaction was measured in the resolved resonance region for ${}^{152,154,156,158}$Gd targets with the Detector for Advanced Neutron Capture Experiments $\ensuremath{\gamma}$-ray calorimeter at the Los Alamos Neutron Science Center. The $\ensuremath{\gamma}$-ray energy spectra for different multiplicities were obtained for several $s$-wave resonances in each nucleus. These spectra were analyzed within the extreme statistical model to provide unique information on the photon strength functions and especially on the scissors mode in odd Gd isotopes. The main result of this analysis is that in all nuclei scissors-mode resonances are built on excited levels and not only on their ground states. The strength of the mode found in ${}^{153}$Gd and ${}^{155}$Gd is comparable to the strength observed in well-deformed even-even Gd isotopes while it is substantially higher in ${}^{157,159}$Gd. The difference in observed strengths of the scissors mode indicates an existence of an even-odd effect in this quantity.}, number={3}, journal={PHYSICAL REVIEW C}, author={Kroll, J. and Baramsai, B. and Mitchell, G. E. and Agvaanluvsan, U. and Becvar, F. and Bredeweg, T. A. and Chyzh, A. and Couture, A. and Dashdorj, D. and Haight, R. C. and et al.}, year={2013}, month={Sep} }