Investigating neutron-proton pairing in sd -shell nuclei via (p,He3) and (He3,p) transfer reactions

Ayyad, Y.; Lee, J.; Tamii, A.; Lay, J. A.; Macchiavelli, A. O.; Aoi, N.; Brown, B. A.; Fujita, H.; Fujita, Y.; Ganioglu, E.; Hatanaka, K.; Hashimoto, T.; Ito, T.; Kawabata, T.; Li, Z.; Liu, H.; Matsubara, H.; Miki, K.; Ong, H. J.; Potel, G.; Sugai, I.; Susoy, G.; Vitturi, A.; Watanabe, H. D.; Yokota, N.; Zenihiro, J.

doi:10.1103/PhysRevC.96.021303

Title: Investigating neutron-proton pairing in $s d$ -shell nuclei via $(p, {}^{3}{He})$ and $({}^{3}{He}, p)$ transfer reactions

Journal Article · Wed Aug 23 00:00:00 EDT 2017 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.96.021303· OSTI ID:1607451

Ayyad, Y. ^[1]; Lee, J. ^[2]; Tamii, A. ^[3]; Lay, J. A. ^[4]; Macchiavelli, A. O. ^[5]; Aoi, N. ^[3]; Brown, B. A. ^[6]; Fujita, H. ^[3]; Fujita, Y. ^[3]; Ganioglu, E. ^[7]; Hatanaka, K. ^[3]; Hashimoto, T. ^[3]; Ito, T. ^[3]; Kawabata, T. ^[8]; Li, Z. ^[9]; Liu, H. ^[9]; Matsubara, H. ^[10]; Miki, K. ^[3]; Ong, H. J. ^[3]; Potel, G. ^[6] more »

Osaka University (Japan); Michigan State University, East Lansing, MI (United States)
University of Hong Kong, Pokfulam (Hong Kong); RIKEN Center for Emergent Matter Science (CEMS), Wako (Japan)
Osaka University (Japan)
University degli Studi di Padova (Italy)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Michigan State University, East Lansing, MI (United States)
Istanbul University (Turkey)
Kyoto University (Japan)
Peking University, Beijing (China)
National Institute of Radiological Sciences (NIRS), Chiba (Japan)
High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

Neutron-proton pairing correlations are investigated in detail via np transfer reactions in N=Zsd-shell nuclei. In particular, we study the cross-section ratio of the lowest 0+ and 1+ states as an observable to quantify the interplay between T=0 (isoscalar) and T=1 (isovector) pairing strengths. The experimental results are compared to second-order distorted-wave Born approximation calculations with proton-neutron amplitudes obtained in the shell-model formalism using the universal sd-shell interaction B. Our results suggest underestimation of the nonneglible isoscalar pairing strength in the shell-model descriptions at the expense of the isovector channel.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); European Commission Seventh Framework Programme; National Science Foundation (NSF)

Grant/Contract Number:: SC0013617; 600376; PHY-1404442; AC02-05CH11231

OSTI ID:: 1607451

Alternate ID(s):: OSTI ID: 1375977

Journal Information:: Physical Review C, Vol. 96, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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References (23)

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Title: Investigating neutron-proton pairing in s d -shell nuclei via ( p , He 3 ) and ( He 3 , p ) transfer reactions

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Title: Investigating neutron-proton pairing in $s d$ -shell nuclei via $(p, {}^{3}{He})$ and $({}^{3}{He}, p)$ transfer reactions