Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains

  title={Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains},
  author={Ivan G. Mukha and L. V. Grigorenko and D. A. Kostyleva and Luis Acosta and Enrique Casarejos and A. A. Ciemny and Wojciech A. Dominik and J. A. Due{\~n}as and V. B. Dunin and J M Espino and A. Estrad'e and Fabio Farinon and A. S. Fomichev and Hans Geissel and Alexander V Gorshkov and Zenon Janas and G. Kami'nski and Oleg A. Kiselev and R. Knobel and Sergey Krupko and Magdalena Kuich and Yu. A. Litvinov and G. Marquinez-Dur'an and I. Martel and Chiara Mazzocchi and Chiara Nociforo and A. K. Ord'uz and M. Pfutzner and S. Pietri and Michal Pomorski and Arthur Prochazka and S. A. Rymzhanova and A. M. S'anchez-Ben'itez and Christoph Scheidenberger and P. G. Sharov and Herbert A. Simon and Branislav Sitar and R. S. Slepnev and Mihai Stanoiu and Peter Strmen and Imrich Szarka and Maya Takechi and Y. K. Tanaka and Helmut Weick and Martin Wolfgang Winkler and John S. Winfield and X. X. Xu and M. V. Zhukov},
  journal={Physical Review C},
The proton-unbound argon and chlorine isotopes have been studied by measuring trajectories of their decay-in-flight products by using a tracking technique with microstrip detectors. The proton (1p) and two-proton (2p) emission processes have been detected in the measured angular correlations "heavy-fragment"+p and "heavy-fragment"+p+p, respectively. The ground states of the previously unknown isotopes Cl30 and Cl28 have been observed for the first time, providing the 1p-separation energies Sp… Expand
Deep excursion beyond the proton dripline. II. Toward the limits of existence of nuclear structure
Prospects of experimental studies of argon and chlorine isotopes located far beyond the proton dripline are studied by using systematics and cluster models. The deviations from the widespreadExpand
Towards the Limits of Existence of Nuclear Structure: Observation and First Spectroscopy of the Isotope ^{31}K by Measuring Its Three-Proton Decay.
The most remote isotope from the proton dripline (by 4 atomic mass units) has been observed: ^{31}K. It is unbound with respect to three-proton (3p) emission, and its decays have been detected inExpand
An empirical formula for the half-lives of exotic two-proton emission
Abstract.An empirical formula is proposed for the two-proton decay half-lives. This study is an extension of the empirical formula reported recently by us for calculating the logarithmic half-livesExpand
New isospin-breaking “USD” Hamiltonians for the sd shell
Two new USD-type Hamiltonians, USDC and USDI, have been developed that directly incorporate Coulomb and other isospin-breaking interactions. Starting from ab initio interactions, linear combinationsExpand
2018 update of the discoveries of nuclides
The 2018 update of the discovery of nuclide project is presented. Fifty new nuclides were observed for the first time in 2018. A large number of isotopes are still only published in conferenceExpand
Mass measurements of As, Se, and Br nuclei, and their implication on the proton-neutron interaction strength toward the N=Z line
Mass measurements of the $^{69}$As, $^{70,71}$Se and $^{71}$Br isotopes, produced via fragmentation of a $^{124}$Xe primary beam at the FRS at GSI, have been performed with the multiple-reflectionExpand


Observation and Spectroscopy of New Proton-Unbound Isotopes ³⁰Ar and ²⁹Cl: An Interplay of Prompt Two-Proton and Sequential Decay.
The first hint of a fine structure of the two-proton decay of (30)Ar*(2(+)) has been obtained by detecting two decay branches into the ground and first-excited states of the (28)S fragment. Expand
Spectroscopy of proton-unbound nuclei by tracking their decay products in-flight: One- and two- proton decays of F15, Ne16, and Na19
A powerful method of investigating proton-unbound nuclear states by tracking their decay products in flight is discussed in detail. To verify the method, four known levels in 15 F , 16 Ne , andExpand
Lifetime of 26 S and a limit for its 2p decay energy
The unknown isotope (26)S, expected to decay by two-proton (2p) emission, was studied theoretically and searched experimentally. The structure of this nucleus was examined within the relativisticExpand
Transition from direct to sequential two-proton decay in s–d shell nuclei
The transition between different mechanisms of two-proton decay in exotic nuclei and the governing physical conditions are generally studied. To perform this large-scale survey, the direct-decayExpand
Several beta-delayed two-proton branches were observed in the decay of Ar-31, the most intense ones proceeding through the isobaric analogue state (IAS) in Cl-31. The mechanism of the two-protonExpand
A novel Si strip array to investigate reaction and decay mechanisms
Abstract The performance of a novel set-up of double-sided silicon micro-strip detectors (DSSD) developed for the GSI-R3B project (reaction studies with relativistic radioactive beams) is presented.Expand
Decay mechanism and lifetime of Kr-67
The lifetime of the recently discovered 2p emitter Kr-67 was found to be considerably below the lower limit predicted theoretically. This communication addresses this issue. Different separationExpand
Table of experimental nuclear ground state charge radii: An update
Abstract The present table contains experimental root-mean-square (rms) nuclear charge radii R obtained by combined analysis of two types of experimental data: (i) radii changes determined fromExpand
Nuclear Data Sheets for A=31
Abstract Nuclear spectroscopic information for the known nuclides of mass 31 (F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar) has been evaluated. A useful source of many of the Adopted Levels for 31 P and 31 SExpand
Improved Kelson-Garvey mass relations for proton-rich nuclei
The improved Kelson-Garvey (ImKG) mass relations are proposed from the mass differences of mirror nuclei. The masses of 31 measured proton-rich nuclei with $7\leq A\leq41$ and $-5\leq (N-Z)\leq-3$Expand