Valence 1 s − 0 d proton vacancy of the Si 32 ground state
Year: 2025
Type: article
Abstract: The $^{32}\mathrm{Si}{(}^{3}\mathrm{He},\mathit{d})^{33}\mathrm{P}$ reaction was studied in inverse kinematics at $6.3\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}/u$. States in $^{33}\mathrm{P}$ corresponding to the proton $1s\text{\ensuremath{-}}0d$ single-particle orbitals were identified up to $\ensuremath{\approx}\phantom{\rule{0.16em}{0ex}}4.5$ MeV in excitation energy. The ($^{3}\mathrm{He},d$) spectroscopic factors were determined from distorted-wave Born approximation calculations. When combined with complementary neutron-adding data, the $1s\text{\ensuremath{-}}0d$ proton vacancies in the $^{32}\mathrm{Si}$ ground state were extracted. In conjunction with a reanalysis of data from previous single-particle measurements, the trends in proton and neutron vacancy were explored across the $^{28,30,32,34}\mathrm{Si}$ isotopes. Both proton and neutron vacancy data show gradual changes in their occupancies. The proton $1{s}_{1/2}$ orbitals in $^{32}\mathrm{Si}$ and $^{34}\mathrm{Si}$ are both consistent with being empty. The ground-state nucleon distributions are described by shell-model calculations constrained to the $1s\text{\ensuremath{-}}0d$ model space.
Source: Physical Review C
DOI: 10.1103/4lzs-mv3l
Authors: N. Watwood, C. R. Hoffman, B. P. Kay, I. A. Tolstukhin, J. Chen, T. L. Tang, D. Bazin, Y. Ayyad, S. Beceiro-Novo, S. J. Freeman, L. P. Gaffney, R. Garg, H. Jayatissa, A. N. Kuchera, P. T. MacGregor, A. J. Mitchell, A. Muñoz-Ramos, C. Müller-Gatermann, F. Recchia, C. Santamaria, M. Z. Serikow, D. K. Sharp, G. L. Wilson, A. H. Wuosmaa, J. C. Zamora
Institutions: Argonne National Laboratory, Southern University of Science and Technology, Michigan State University, Universidade de Santiago de Compostela, Universidade da Coruña, University of Manchester, European Organization for Nuclear Research, University of Liverpool, Davidson College, Australian National University, University of Padua, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Morgan State University, Louisiana State University, University of Connecticut
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, National Natural Science Foundation of China, Federación Española de Enfermedades Raras, Ministerio de Ciencia e Innovación, Xunta de Galicia, Office of Fossil Energy, Office of Science, Australian Research Council, Agencia Estatal de Investigación, Nuclear Physics, Central Laser Facility, Science and Technology Facilities Council, Argonne National Laboratory, International Technology Center Pacific
Awards: G102163711, G107546177, G1313983767, G1382944064, FACILITY FOR RARE ISOTOPE BEAMS, G1593334397, G1664757510, G1711906244, G1760870335, G1819783329, G2227393196, G2262748287, G2287611682, G2424642726, G2473418876, Operation of the NSCL as a National User Facilty & Research Program, G262962599, G2896472831, G3075337988, G3237604167, G3339719265, G3480869486, G425668148, G430777504, FACILITY FOR RARE ISOTOPE BEAMS, G4497241005, G4590456396, G4827484230, G498139845, G513797252, G5473815021, G5685237454, Nuclear vibrations under scrutiny in near-spherical and deformed nuclei, G6425624702, G6848031779, G6918803902, G7084143925, G735391947, G7476386635, STUDIES OF EXOTIC NUCLEI WITH FEW-NUCLEON TRANSFER REACTIONS, G822227954, STUDIES OF EXOTIC NUCLEI WITH FEW-NUCLEON TRANSFER REACTIONS, G880751848, G969889393, G993149817
OpenAlex ID: W4414973340