Neutron-hole strength in N=81 nuclei

Howard, A. M.; Freeman, Sean J.; Sharp, D. K.; Bloxham, T.; Clark, J. A.; Deibel, C. M.; Kay, B. P.; Parker, P. D.; Schiffer, J. P.; Thomas, J. S.

doi:10.1103/PhysRevC.101.034309

Neutron-hole strength in $N = 81$ nuclei

Journal Article · Fri Mar 20 00:00:00 EDT 2020 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.101.034309· OSTI ID:1606256

Howard, A. M. ^[1]; ^[2]; ^[2]; Bloxham, T. ^[3]; Clark, J. A. ^[4]; Deibel, C. M. ^[5]; Kay, B. P. ^[4]; Parker, P. D. ^[6]; Schiffer, J. P. ^[4]; Thomas, J. S. ^[2]

Univ. of Manchester (United Kingdom); Technical Univ. of Munich, Garching (Germany)
Univ. of Manchester (United Kingdom)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Louisiana State Univ., Baton Rouge, LA (United States); Michigan State Univ., East Lansing, MI (United States)
Yale Univ., New Haven, CT (United States)

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. Here, the change in these centroid energies as a function of proton number have been compared to calculations of the monopole shift for the s_1/2 and h_11/2 orbitals, where the majority of the strength has been observed. Significant fragmentation of strength was observed for the d and g_7/2 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.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); United Kingdom Science and Technology Facilities Council

Grant/Contract Number:: AC02-06CH11357; FG02-91ER40609

OSTI ID:: 1606256

Alternate ID(s):: OSTI ID: 1605624

Journal Information:: Physical Review C, Journal Name: Physical Review C Journal Issue: 3 Vol. 101; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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