@article{smith_bowman_crawford_grossmann_haseyama_masaike_matsuda_mitchell_penttila_roberson_et al._2002, title={Neutron resonance spectroscopy of Pd-104, Pd-105, and Pd-110}, volume={65}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.65.024607}, abstractNote={We have measured neutron resonances in the palladium isotopes 104, 105, and 110 for neutron energies from 1 to 2100 eV. Many new p-wave resonances have been observed. Their neutron widths and, in several cases, the radiative widths were measured. The average level spacings and the s-wave and p-wave neutron strength functions were determined. The time-of-flight method was used for both neutron total cross section measurements and total (n,γ) reaction yield measurements at the pulsed spallation neutron source of Los Alamos Neutron Science Center. Well established resonance spectroscopy for these isotopes is essential for the analysis of parity violation data that were recently measured in palladium. Disciplines Atomic, Molecular and Optical Physics | Physics Authors J D. Bowman, D A. Smith, Bret E. Crawford, T Haseyama, C A. Grossmann, A Masaike, Y Matsuda, G E. Mitchell, S I. Penttila, N R. Roberson, S J. Seestrom, E I. Sharapov, Sharon L. Stephenson, V W. Yuan, and A M. Sukhovoj This article is available at The Cupola: Scholarship at Gettysburg College: http://cupola.gettysburg.edu/physfac/7 Neutron resonance spectroscopy of Pd, Pd, and Pd D. A. Smith,* J. D. Bowman, B. E. Crawford, C. A. Grossmann, T. Haseyama, A. Masaike, Y. Matsuda, G. E. Mitchell, S. I. Penttila, N. R. Roberson, S. J. Seestrom, E. I. Sharapov, S. L. Stephenson, A. M. Sukhovoj, and V. W. Yuan Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Duke University, Durham, North Carolina 27708 and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 North Carolina State University, Raleigh, North Carolina 27695-8202 and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 Physics Department, Kyoto University, Kyoto 606-01, Japan Joint Institute for Nuclear Research, RU-141980 Dubna, Russia ~Received 25 August 2000; revised manuscript received 30 August 2001; published 16 January 2002! We have measured neutron resonances in the palladium isotopes 104, 105, and 110 for neutron energies from 1 to 2100 eV. Many new p-wave resonances have been observed. Their neutron widths and, in several cases, the radiative widths were measured. The average level spacings and the s-wave and p-wave neutron strength functions were determined. The time-of-flight method was used for both neutron total cross section measurements and total ~n ,g) reaction yield measurements at the pulsed spallation neutron source of Los Alamos Neutron Science Center. Well established resonance spectroscopy for these isotopes is essential for the analysis of parity violation data that were recently measured in palladium. DOI: 10.1103/PhysRevC.65.024607 PACS number~s!: 25.40.Ny, 24.80.1y, 27.60.1j}, number={2}, journal={PHYSICAL REVIEW C}, author={Smith, DA and Bowman, JD and Crawford, BE and Grossmann, CA and Haseyama, T and Masaike, A and Matsuda, Y and Mitchell, GE and Penttila, SI and Roberson, NR and et al.}, year={2002}, month={Feb} }
 @article{matsuda_bowman_crawford_delheij_haseyama_knudsen_lowie_masaike_masuda_mitchell_et al._2001, title={Parity violation in neutron resonances of antimony and iodine}, volume={64}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.64.015501}, abstractNote={Parity violation in p-wave neutron resonances of ${}^{121}\mathrm{Sb},$ ${}^{123}\mathrm{Sb},$ and ${}^{127}\mathrm{I}$ has been measured by transmission of a longitudinally polarized neutron beam through natural antimony and iodine targets. The measurements were performed at the pulsed spallation neutron source of the Los Alamos Neutron Science Center. Five statistically significant parity violation effects were observed in ${}^{121}\mathrm{Sb},$ one effect in ${}^{123}\mathrm{Sb},$ and seven effects in ${}^{127}\mathrm{I}.$ The weak interaction rms matrix elements and the corresponding spreading widths were determined.}, number={1}, journal={PHYSICAL REVIEW C}, author={Matsuda, Y and Bowman, JD and Crawford, BE and Delheij, PPJ and Haseyama, T and Knudsen, JN and Lowie, LY and Masaike, A and Masuda, Y and Mitchell, GE and et al.}, year={2001}, month={Jul} }
 @article{yen_bowman_bolton_crawford_delheij_hart_haseyama_frankle_iinuma_knudson_et al._2000, title={A high-rate (10)B-loaded liquid scintillation detector for parity-violation studies in neutron resonances}, volume={447}, ISSN={["0168-9002"]}, DOI={10.1016/S0168-9002(99)01308-X}, abstractNote={We have developed a large-area 10B-loaded liquid scintillation detector for parity-violation studies in neutron resonances with high instantaneous neutron fluxes from the LANSCE short-pulse spallation source. The detector has an efficiency of 95%, 85% and 71% at neutron energies of 10, 100 and 1000 eV, respectively. The neutron mean capture time in the detector is (416±5)ns. We describe the detector and the current-mode signal processing system, that can handle neutron rates up to 500 MHz.}, number={3}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT}, author={Yen, YF and Bowman, JD and Bolton, RD and Crawford, BE and Delheij, PPJ and Hart, GW and Haseyama, T and Frankle, CM and Iinuma, M and Knudson, JN and et al.}, year={2000}, month={Jun}, pages={476–489} }
 @article{mitchell_bowman_crawford_delheij_frankle_iinuma_knudson_lowie_masaike_matsuda_et al._2000, title={New search for parity violation in nonresonant neutron scattering on thorium}, volume={61}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.61.045503}, abstractNote={The parity-violating longitudinal asymmetry of the neutron scattering cross section has been measured for thorium in the off-resonance energy intervals from 30 to 300 eV. The observed result of $(0.5\ifmmode\pm\else\textpm\fi{}1.6)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ is compared with theoretical predictions.}, number={4}, journal={PHYSICAL REVIEW C}, author={Mitchell, GE and Bowman, JD and Crawford, BE and Delheij, PPJ and Frankle, CM and Iinuma, M and Knudson, JN and Lowie, LY and Masaike, A and Matsuda, Y and et al.}, year={2000}, month={Apr} }
 @article{sharapov_bowman_crawford_delheij_frankle_iinuma_knudson_lowie_lynch_masaike_et al._2000, title={Parity violation in Th-232 neutron resonances above 250 eV}, volume={61}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.61.025501}, abstractNote={The analysis of parity nonconservation (PNC) measurements performed on {sup 232}Th by the TRIPLE Collaboration has been extended to include the neutron energy range of 250 to 1900 eV. Below 250 eV all ten statistically significant parity violations have the same sign. However, at higher energies PNC effects of both signs were observed in the transmission of longitudinally polarized neutrons through a thick thorium target. Although the limited experimental energy resolution precluded analysis in terms of the longitudinal asymmetry, parity violations were observed and the cross section differences for positive and negative neutron helicities were obtained. For comparison, a similar analysis was performed on the data below 250 eV, for which longitudinal asymmetries were obtained previously. For energies below 250 eV, the p-wave neutron strength functions for the J=1/2 and J=3/2 states were extracted: S{sub 1/2}{sup 1}=(1.68{+-}0.61)x10{sup -4} and S{sub 3/2}{sup 1}=(0.75{+-}0.18)x10{sup -4}. The data provide constraints on the properties of local doorway states proposed to explain the PNC sign effect in thorium. (c) 2000 The American Physical Society.}, number={2}, journal={PHYSICAL REVIEW C}, author={Sharapov, EI and Bowman, JD and Crawford, BE and Delheij, PPJ and Frankle, CM and Iinuma, M and Knudson, JN and Lowie, LY and Lynch, JE and Masaike, A and et al.}, year={2000}, month={Feb} }
 @article{stephenson_bowman_corvi_crawford_delheij_frankle_iinuma_knudson_lowie_masaike_et al._2000, title={Parity violation in neutron resonances in In-115}, volume={61}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.61.045501}, abstractNote={Parity nonconservation (PNC) was studied in p-wave resonances in indium by measuring the helicity dependence of the neutron total cross section in the neutron energy range 6.0-316 eV with the time-of-flight method at LANSCE. A total of 36 p-wave neutron resonances were studied in {sup 115}In, and statistically significant asymmetries were observed for nine cases. An analysis treating the PNC matrix elements as random variables yields a weak matrix element of M=(0.67{sub -0.12}{sup +0.16}) meV and a weak spreading width of {gamma}{sub w}=(1.30{sub -0.43}{sup +0.76})x10{sup -7} eV. (c) 2000 The American Physical Society.}, number={4}, journal={PHYSICAL REVIEW C}, author={Stephenson, SL and Bowman, JD and Corvi, F and Crawford, BE and Delheij, PPJ and Frankle, CM and Iinuma, M and Knudson, JN and Lowie, LY and Masaike, A and et al.}, year={2000}, month={Apr} }
 @article{seestrom_frankle_bowman_crawford_haseyama_masaike_matsuda_penttila_roberson_sharapov_et al._1999, title={Apparatus for parity-violation study via capture gamma-ray measurements}, volume={433}, ISSN={["1872-9576"]}, DOI={10.1016/S0168-9002(99)00481-7}, abstractNote={The Time Reversal and Parity at Low Energy (TRIPLE) Collaboration uses a short-pulsed longitudinally polarized epithermal neutron beam at the Los Alamos Neutron Science Center to study spatial parity violation (PV) in the compound nucleus. The typical PV experiment measures the longitudinal cross-section asymmetry by the neutron transmission method through thick samples. Neutron capture γ-ray measurement provides an alternative method for the study of PV, which enables the use of smaller amounts of isotopically pure target material. In 1995 TRIPLE commissioned a new neutron-capture detector consisting of 24 pure CsI scintillators arranged in a cylindrical geometry around the neutron beam. The characteristics and the performance of the detector and spin transport are described.}, number={3}, journal={NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT}, author={Seestrom, SJ and Frankle, CM and Bowman, JD and Crawford, BC and Haseyama, T and Masaike, A and Matsuda, A and Penttila, SI and Roberson, RN and Sharapov, EI and et al.}, year={1999}, month={Sep}, pages={603–613} }