Proton inelastic scattering reveals deformation in He-8

Holl, M.; Kanungo, R.; Sun, Z.; Hagen, G.; Lay, J.; Moro, A.; Navratil, P.; Papenbrock, T.; Alcorta, M.; Connolly, D.; Davids, B.; Varela, A.; Gennari, M.; Hackman, G.; Henderson, J.; Ishimoto, S.; Kilic, ALİ; Krucken, R.; Lennarz, A.; Liang, J.; Measures, J.; Mittig, W.; Paetkau, O.; Psaltis, A.; Quaglioni, S.; Randhawa, J.; Smallcombe, J.; Thompson, I.; Vorabbi, M.; Williams, M.

doi:10.1016/j.physletb.2021.136710

Proton inelastic scattering reveals deformation in He-8

Atıf İçin Kopyala

Holl M., Kanungo R., Sun Z. H., Hagen G., Lay J. A., Moro A. M., ...Daha Fazla

PHYSICS LETTERS B, cilt.822, 2021 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 822
Basım Tarihi: 2021
Doi Numarası: 10.1016/j.physletb.2021.136710
Dergi Adı: PHYSICS LETTERS B
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH, Directory of Open Access Journals
Eskişehir Osmangazi Üniversitesi Adresli: Hayır

Özet

A measurement of proton inelastic scattering of He-8 at 8.25A MeV at TRIUMF shows a resonance at 3.54(6) MeV with a width of 0.89(11) MeV. The energy of the state is in good agreement with coupled cluster and no-core shell model with continuum calculations, with the latter successfully describing the measured resonance width as well. Its differential cross section analyzed with phenomenological collective excitation form factor and microscopic coupled reaction channels framework consistently reveals a large deformation parameter beta(2) = 0.40(3), consistent with no-core shell model predictions of a large neutron deformation. This deformed double-closed shell at the neutron drip-line opens a new paradigm. (C) 2021 Published by Elsevier B.V.