@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{smith_bowman_crawford_grossmann_haseyama_masaike_matsuda_mitchell_penttila_roberson_et al._2002, title={Parity violation in neutron resonances of palladium}, volume={65}, ISSN={["2469-9993"]}, DOI={10.1103/physrevc.65.035503}, abstractNote={Parity violation in p-wave neutron resonances of the palladium isotopes 104, 105, 106, and 108 has been measured by transmission of a longitudinally polarized neutron beam through a natural palladium target. The measurements were performed at the pulsed spallation neutron source of Los Alamos Neutron Science Center. The rms weak interaction matrix elements and the corresponding spreading widths were determined for 104 Pd, 105 Pd, and 106 Pd Disciplines Atomic, Molecular and Optical Physics | Physics Authors D A. Smith, J D. Bowman, Bret 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, Sharon L. Stephenson, and V W. Yuan This article is available at The Cupola: Scholarship at Gettysburg College: http://cupola.gettysburg.edu/physfac/6 Parity violation in neutron resonances of palladium 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, 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, 141980 Dubna, Russia ~Received 3 November 2001; published 4 March 2002! Parity violation in p-wave neutron resonances of the palladium isotopes 104, 105, 106, and 108 has been measured by transmission of a longitudinally polarized neutron beam through a natural palladium target. The measurements were performed at the pulsed spallation neutron source of Los Alamos Neutron Science Center. The rms weak interaction matrix elements and the corresponding spreading widths were determined for Pd, Pd, and Pd. DOI: 10.1103/PhysRevC.65.035503 PACS number~s!: 24.80.1y, 11.30.Er, 25.40.Ny, 27.60.1j}, number={3}, 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, GW and Penttila, SI and Roberson, NR and et al.}, year={2002}, month={Mar} } @article{postma_bowman_corvi_crawford_delheij_frankle_grossmann_gunsing_haseyama_knudson_et al._2001, title={Parity violation at neutron resonances and related neutron spectroscopy experiments}, volume={51}, ISSN={["0011-4626"]}, DOI={10.1007/s10582-001-0036-2}, journal={CZECHOSLOVAK JOURNAL OF PHYSICS}, author={Postma, H and Bowman, JD and Corvi, F and Crawford, BE and Delheij, PPJ and Frankle, CM and Grossmann, CA and Gunsing, F and Haseyama, T and Knudson, JN and et al.}, year={2001}, pages={A289–A298} } @article{smith_bowman_crawford_grossmann_haseyama_johnson_masaike_matsuda_mitchell_nazarenko_et al._2001, title={Parity violation in neutron resonances of Sn-117}, volume={64}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.64.015502}, abstractNote={Parity nonconservation (PNC) was studied in p-wave neutron resonances of {sup 103}Rh in the neutron energy range 30 to 490 eV. The helicity dependence of the neutron total cross section of rhodium was determined by capture measurements with the time-of-flight method at the Manuel Lujan Neutron Scattering Center at the Los Alamos National Laboratory. A total of 32 p-wave resonances were studied and statistically significant longitudinal asymmetries were observed for resonances at E{sub n}=44.5, 110.8, 321.6, and 432.9 eV. A statistical analysis treating the PNC matrix elements as random variables yields a weak spreading width {Gamma}{sub w}=(1.42{sub {minus}0.59}{sup +1.21}){times}10{sup {minus}7}heV. {copyright} {ital 1999} {ital The American Physical Society}}, number={1}, journal={PHYSICAL REVIEW C}, author={Smith, DA and Bowman, JD and Crawford, BE and Grossmann, CA and Haseyama, T and Johnson, MB and Masaike, A and Matsuda, Y and Mitchell, GE and Nazarenko, VA and et al.}, year={2001}, month={Jul} } @article{grossmann_labonte_mitchell_shriner_shriner_vavrina_wallace_2000, title={Complete spectroscopy of P-30}, volume={62}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.62.024323}, abstractNote={The {sup 29}Si(p,{gamma}){sup 30}P reaction was studied for 32 resonances in the energy range E{sub p}=1.0-2.5 MeV. Angular distributions were measured for 230 primary and secondary transitions. Results from the analysis of these data were combined with previous measurements of the {sup 29}Si(p,p{sub 0}){sup 29}Si and {sup 29}Si(p,{gamma}){sup 30}P reactions to determine the spin J, parity {pi}, and isospin T of many levels. Remaining ambiguities were eliminated by comparison with the spectrum of the parent nucleus {sup 30}Si and with the calculated shell-model spectrum. J, {pi}, and T have been assigned for 103 states up to an excitation energy of 8.0 MeV. (c) 2000 The American Physical Society.}, number={2}, journal={PHYSICAL REVIEW C}, author={Grossmann, CA and LaBonte, MA and Mitchell, GE and Shriner, JD and Shriner, JF and Vavrina, GA and Wallace, PM}, year={2000}, month={Aug} } @article{shriner_grossmann_mitchell_2000, title={Level statistics and transition distributions of P-30}, volume={62}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.62.054305}, abstractNote={Level statistics and reduced transition probability distributions have been analyzed over the region E{sub x}=0--8014keV in {sup 30}P and compared to previous results from {sup 26}Al. The level statistics in {sup 30}P show clear evidence of broken isospin symmetry and are very similar to those from {sup 26}Al. Transition distributions in the two nuclides are different, but both suggest that the broken symmetry also affects the transitions.}, number={5}, journal={PHYSICAL REVIEW C}, author={Shriner, JF and Grossmann, CA and Mitchell, GE}, year={2000}, month={Nov} } @article{smith_bowman_crawford_grossmann_haseyama_masaike_matsuda_mitchell_penttila_roberson_et al._1999, title={Neutron resonance spectroscopy of Rh-103 from 30 eV to 2 keV}, volume={60}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.60.045502}, abstractNote={Neutron resonances in {sup 103}Rh have been measured for neutron energies from 30 to 2000 eV using the time-of-flight method and the (n,{gamma}) reaction. The rhodium resonance spectroscopy is essential for the analysis of parity violation measurements recently performed on neutron resonances in {sup 103}Rh. Neutron scattering and radiative widths were determined, and orbital angular momentum assignments made with a Bayesian analysis. The s-wave and p-wave strength functions and average level spacings were determined. {copyright} {ital 1999} {ital The American Physical Society}}, number={4}, 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={1999}, month={Oct} } @article{smith_bowman_crawford_grossmann_haseyama_johnson_masaike_matsuda_mitchell_nazarenko_et al._1999, title={Neutron resonance spectroscopy of Sn-117 from 1 eV to 1.5 keV}, volume={59}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.59.2836}, abstractNote={Parity violation has been studied recently for neutron resonances in {sup 117}Sn. The neutron resonance spectroscopy is essential for the analysis of the parity violation data. We have measured neutron resonances in {sup 117}Sn for neutron energies from 1 to 1500 eV using the time-of-flight method and the (n,{gamma}) reaction. The sample was enriched to 87.6{percent} {sup 117}Sn. Neutron scattering and radiative widths were determined, and orbital angular momentum assignments were made with a Bayesian analysis. The {ital s}-wave and {ital p}-wave strength functions and average level spacings were determined. {copyright} {ital 1999} {ital The American Physical Society}}, number={5}, journal={PHYSICAL REVIEW C}, author={Smith, DA and Bowman, JD and Crawford, BE and Grossmann, CA and Haseyama, T and Johnson, MB and Masaike, A and Matsuda, Y and Mitchell, GE and Nazarenko, VA and et al.}, year={1999}, month={May}, pages={2836–2843} } @article{smith_bowman_crawford_grossmann_haseyama_masaike_matsuda_mitchell_penttila_roberson_et al._1999, title={Parity violation in neutron resonances of Rh-103}, volume={60}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.60.045503}, abstractNote={Parity nonconservation (PNC) was studied in p-wave neutron resonances of 103Rh in the neutron energy range 30 to 490 eV. The helicity dependence of the neutron total cross section of rhodium was determined by capture measurements with the time-of-flight method at the Manuel Lujan Neutron Scattering Center at the Los Alamos National Laboratory. A total of 32 p-wave resonances were studied and statistically significant longitudinal asymmetries were observed for resonances at En=44.5, 110.8, 321.6, and 432.9 eV. A statistical analysis treating the PNC matrix elements as random variables yields a weak spreading widthΓw=(1.42-0.59+1.21)×10-7eV. Disciplines Atomic, Molecular and Optical Physics | Physics Authors D A. Smith, J D. Bowman, Bret 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, Sharon L. Stephenson, and V W. Yuan This article is available at The Cupola: Scholarship at Gettysburg College: https://cupola.gettysburg.edu/physfac/14 Parity violation in neutron resonances of Rh D. A. Smith, J. D. Bowman, 1 B. E. Crawford, 2,* C. A. Grossmann, 3 T. Haseyama, 4 A. Masaike, 4,† Y. Matsuda, 4,‡ G. E. Mitchell, S. I. Penttila, 1 N. R. Roberson, 2 S. J. Seestrom, 1 E. I. Sharapov, 5 S. L. Stephenson, 3,* 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 7 April 1999; published 16 September 1999 ! Parity nonconservation~PNC! was studied inp-wave neutron resonances of Rh in the neutron energy range 30 to 490 eV. The helicity dependence of the neutron total cross section of rhodium was determined by capture measurements with the time-of-flight method at the Manuel Lujan Neutron Scattering Center at the Los Alamos National Laboratory. A total of 32 p-wave resonances were studied and statistically significant longitudinal asymmetries were observed for resonances at En544.5, 110.8, 321.6, and 432.9 eV. A statistical analysis treating the PNC matrix elements as random variables yields a weak spreading width Gw 5(1.4220.59 )31027 eV. @S0556-2813 ~99!06810-7# PACS number ~s!: 25.40.Ny, 11.30.Er, 27.90. 1b}, number={4}, 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={1999}, month={Oct} } @article{powell_iliadis_champagne_grossmann_hale_hansper_mclean_1999, title={Reaction rate of Mg-24(p,gamma)Al-25}, volume={660}, ISSN={["0375-9474"]}, DOI={10.1016/S0375-9474(99)00390-5}, abstractNote={The proton-capture reaction on 24Mg has been investigated in the bombarding energy range of Ep=0.2–1.7 MeV. Resonance properties (strengths, branching ratios and lifetimes) of low-energy resonances have been measured. From the experimental results, accurate proton partial widths, γ-ray partial widths and total widths (Γp, Γγ, and Γ) have been deduced. The present experimental information establishes the 24Mg+p reaction rates over the temperature range T=0.02–2.0 GK with statistical uncertainties of 5% to 21%. Our recommended reaction rates deviate from previous estimates by 18% to 45%. Based on our results, we can rule out the recent suggestion that the total width of the ER=223 keV resonance has a significant influence on the reaction rates. We also discuss several effects that might give rise to systematic uncertainties in the reaction rates. The astrophysical implications for hydrogen burning of 24Mg at low stellar temperatures are presented.}, number={3}, journal={NUCLEAR PHYSICS A}, author={Powell, DC and Iliadis, C and Champagne, AE and Grossmann, CA and Hale, SE and Hansper, VY and McLean, LK}, year={1999}, month={Nov}, pages={349–378} }