RT Journal Article
T1 Spectroscopy of excited states of unbound nuclei 30Ar and 29Cl
A1 Xu, X. D.
A1 Dueñas Díaz, José Antonio
A1 Marquínez Durán, Gloria
A1 Martel Bravo, Ismael
A1 Ordúz, A. K.
A1 Sánchez Benítez, Ángel Miguel
A1 Winfield, J. S.
AB Several states of proton-unbound isotopes 30Ar and 29Cl were investigated by measuring their in-flight decay products, 28S + proton + proton and 28S + proton, respectively. A refined analysis of 28S-proton angular correlations indicates that the ground state of 30Ar is located at 2.45+0.05-0.10 MeV above the two-proton emission threshold. The investigation of the decay mechanism of the 30Ar ground state demonstrates that it has the transition dynamics. In the “transitional” region, the correlation patterns of the decay products present a surprisingly strong sensitivity to the two-proton decay energy of the 30Ar ground state and the one-proton decay energy as well as the one-proton decay width of the 29Cl ground state. The comparison of the experimental 28S-proton angular correlations with those resulting from Monte Carlo simulations of the detector response illustrates that other observed 30Ar excited states decay by sequential emission of protons via intermediate resonances in 29Cl. Based on the findings, the decay schemes of the observed states in 30Ar and 29Cl were constructed. For calibration purposes and for checking the performance of the experimental setup, decays of the previously known states of a two-proton emitter 19Mg were remeasured. Evidences for one new excited state in 19Mg and two unknown states in 18Na were found.
PB American Physical Society
SN 2469-9985
SN 2469-9993 (electrónico)
YR 2018
FD 2018
LK http://hdl.handle.net/10272/14904
UL http://hdl.handle.net/10272/14904
LA eng
NO Xu, X.D. Dueñas Díaz, J.A., Marquínez Durán, G., Martel Bravo, I. Ordúz, A.K., Sánchez Benítez, A.M., Winfield, J.S.: "Spectroscopy of excited states of unbound nuclei 30Ar and 29Cl".  Physical Review C.  Vol. 97(3). https://doi.org/10.1103/physrevc.97.034305
NO This work was supported in part by the Helmholtz International Center for FAIR (HIC for FAIR), the Helmholtz Association (Grant No. IK-RU-002), the Russian Ministry of Education and Science (Grant No. NSh-932.2014.2), the Russian Science Foundation (Grant No. 17-12-01367), the Polish National Science Center (Contract No. UMO-2011/01/B/ST2/01943), the Polish Ministry of Science and Higher Education (Grant No. 0079/DIA/2014/43, Grant Diamentowy), the Helmholtz-CAS Joint Research Group (Grant No. HCJRG-108), the FPA2009-08848 contract (MICINN, Spain), and the Justus-Liebig-Universitat Giessen (JLU) and GSI under the JLU-GSI strategic Helmholtz partnership agreement. This article is a part of the Ph.D. thesis of X.-D. Xu. The authors acknowledge the help of D. Kostyleva in the preparation of the manuscript.This work was supported in part by the HelmholtzInternational Center for FAIR (HIC for FAIR), theHelmholtz Association (grant IK-RU-002), the RussianMinistry of Education and Science (grant No. NSh-932.2014.2), the Russian Science Foundation (grantNo. 17-12-01367), the Polish National Science Center(Contract No. UMO-2011/01/B/ST2/01943), the PolishMinistry of Science and Higher Education (Grant No.0079/DIA/2014/43,Grant Diamentowy), the Helmholtz-CAS Joint Research Group (grant HCJRG-108), theFPA2009-08848 contract (MICINN, Spain), the Justus-Liebig-Universit¨at Gießen (JLU) and GSI under the JLUGSIstrategic Helmholtz partnership agreement. Thisarticle is a part of PhD thesis of X.-D. Xu. The authorsacknowledge the help of D. Kostyleva in the preparationof the manuscript.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026