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Title: Neutron-hole Strength in N = 81 Nuclei

Abstract

A systematic study of neutron-hole strength in the N=81 nuclei 137Ba, 139Ce, 141Nd, and 143Sm is reported. The single-neutron removal reactions (p,d) and (3He,α) were measured at energies of 23 and 34 MeV, respectively. Spectroscopic factors were extracted from measured cross sections through a distorted-wave Born approximation analysis and centroids of single-particle strength have been established. The change in these centroid energies as a function of proton number have been compared to calculations of the monopole shift for the s1/2 and h11/2 orbitals, where the majority of the strength has been observed. Significant fragmentation of strength was observed for the d and g7/2 orbitals, particularly for the latter orbital which is deeply bound, with summed strengths that indicate a significant amount lies outside of the measured excitation energy range.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Nuclear Physics; United Kingdom Science and Technology Facilities Council; USDOE
OSTI Identifier:
1606256
Alternate Identifier(s):
OSTI ID: 1605624
Grant/Contract Number:  
AC02-06CH11357; FG02-91ER-40609
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 101; Journal Issue: 3
Country of Publication:
United States
Language:
English

Citation Formats

Howard, A. M., Freeman, S. J., Sharp, D. K., Bloxham, T., Clark, J. A., Deibel, C. M., Kay, B. P., Parker, P. D., Schiffer, J. P., and Thomas, J. S. Neutron-hole Strength in N = 81 Nuclei. United States: N. p., 2020. Web. doi:10.1103/PhysRevC.101.034309.
Howard, A. M., Freeman, S. J., Sharp, D. K., Bloxham, T., Clark, J. A., Deibel, C. M., Kay, B. P., Parker, P. D., Schiffer, J. P., & Thomas, J. S. Neutron-hole Strength in N = 81 Nuclei. United States. doi:10.1103/PhysRevC.101.034309.
Howard, A. M., Freeman, S. J., Sharp, D. K., Bloxham, T., Clark, J. A., Deibel, C. M., Kay, B. P., Parker, P. D., Schiffer, J. P., and Thomas, J. S. Fri . "Neutron-hole Strength in N = 81 Nuclei". United States. doi:10.1103/PhysRevC.101.034309.
@article{osti_1606256,
title = {Neutron-hole Strength in N = 81 Nuclei},
author = {Howard, A. M. and Freeman, S. J. and Sharp, D. K. and Bloxham, T. and Clark, J. A. and Deibel, C. M. and Kay, B. P. and Parker, P. D. and Schiffer, J. P. and Thomas, J. S.},
abstractNote = {A systematic study of neutron-hole strength in the N=81 nuclei 137Ba, 139Ce, 141Nd, and 143Sm is reported. The single-neutron removal reactions (p,d) and (3He,α) were measured at energies of 23 and 34 MeV, respectively. Spectroscopic factors were extracted from measured cross sections through a distorted-wave Born approximation analysis and centroids of single-particle strength have been established. The change in these centroid energies as a function of proton number have been compared to calculations of the monopole shift for the s1/2 and h11/2 orbitals, where the majority of the strength has been observed. Significant fragmentation of strength was observed for the d and g7/2 orbitals, particularly for the latter orbital which is deeply bound, with summed strengths that indicate a significant amount lies outside of the measured excitation energy range.},
doi = {10.1103/PhysRevC.101.034309},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 101,
place = {United States},
year = {2020},
month = {3}
}

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