Crossing the dripline to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>11</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">N</mml:mi></mml:math>using elastic resonance scattering

Markenroth, K.; Axelsson, L.; Baxter, S.; Borge, M. J. G.; Donzaud, C.; Fayans, S.A.; Fynbo, H. O. U.; Goldberg, V. Z.; Grévy, S.; Guillemaud‐Mueller, D.; Jonson, B.; Källman, K.-M.; Leenhardt, S.; Lewitowicz, M.; Lönnroth, T.; Manngård, P.; Martel, I.; Mueller, A. C.; Mukha, I.; Nilsson, T.; Nyman, G.; Orr, N. A.; Riisager, K.; Rogachev, G. V.; Saint‐Laurent, M. G.; Serikov, I.N.; Shul'gina, N.B.; Sorlin, O.; Steiner, M.; Tengblad, O.; Thoennessen, M.; Tryggestad, E.; Trzaska, W. H.; Wenander, F.; Winfield, J. S.; Wolski, R.

doi:10.1103/physrevc.62.034308

Cited by 57 publications

(38 citation statements)

References 29 publications

(96 reference statements)

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“…The technique was first suggested by [41,42]. More details about the technique can be found in [43,44]. In this approach helium gas is used as the target and the 14 C ions as the beam.…”

Section: Experiments and Analysismentioning

confidence: 99%

α-cluster structure ofO18

et al. 2014

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Background: Clustering phenomena in N = Z nuclei provide an opportunity to understand the interplay between cluster and nucleon degrees of freedom. Purpose:To study resonances in the 18 O spectrum, populated in 14 C+α elastic scattering.Method: The Thick Target Inverse Kinematics (TTIK) technique was used to measure the excitation function for the 14 C+α elastic scattering. A 42 MeV 14 C beam was used to populate states of excitation energy up to 14.9 MeV in 18 O. The analysis was performed using a multi-level, multi-channel R-Matrix approach.Results: Detailed spectroscopic information, including spin-parities, partial α-and neutron-decay widths and dimensionless reduced widths, was obtained for excited states in 18 O between 8 and 14.9 MeV in excitation energy. Cluster-Nucleon Configuration Interaction Model calculations of the same quantities are performed and compared to the experimental results.Conclusions: Strong fragmentation of large α-cluster strengths is observed in the spectrum of 18 O making the α-cluster structure of 18 O quite different from the pattern of known quasi-rotational bands of alternating parity that are characteristic of N = Z, even-even nuclei like 16 O and 20 Ne.

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“…The technique was first suggested by [41,42]. More details about the technique can be found in [43,44]. In this approach helium gas is used as the target and the 14 C ions as the beam.…”

Section: Experiments and Analysismentioning

confidence: 99%

α-cluster structure ofO18

et al. 2014

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“…is too short for a real separation between the two possible decay steps. This would put 12 O decay in a similar category as 6 Be and 8 C two-proton decays where the decay energy is also comparable to the width of the intermediate state and thus cannot be understood as a sequential-decay process [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The location of 11 N g.s. was not known at the time of the original experiment [1] and even now there is some uncertainty as to its exact location and width [5][6][7][8][9]. The latter range from 240(240) keV to 1.44 (20) MeV.…”

Section: Introductionmentioning

confidence: 99%

Two-proton decay of12O and its isobaric analog state in12N

et al. 2012

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Following neutron knockout from a 13 O beam, 12 O fragments were created and the three decay products following two-proton decay were detected. A new ground-state mass was determined by the invariant mass method implying a decay kinetic energy of 1.638(24) MeV, and the width was found to be less than 72 keV. The latter is inconsistent with previous measurements with lower experimental resolutions, but consistent with theoretical estimates. The isobaric analog of 12 O in 12 N was produced from proton knockout reactions with the same beam and decayed by twoproton emission to the isobaric analog state in 10 B with a decay kinetic energy of 1.165(29) MeV. It represents only the second case of an analog state where two-proton decay is the only isospin and energy conserving particle decay mode. With our measurements of the mass excesses of 12 O and it analog, the quadratic form of the isobaric multiplet mass equation was found to fit the A=12 quintet and any deviations are less than the magnitude found for the A=8 quintet and A=7 and 9 quartets.

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“…In particular, the measured 1p and 2p decays of the recently found excited states in 15 F and 16 Ne [11] gave evidence for relatively stable nuclear configurations beyond the proton drip line. The observed states have much smaller widths compared to the respective predictions of models assuming single-particle configurations of parent states.…”

mentioning

confidence: 82%

“…of 15 F or 10,11 N are seen as broad s-wave proton resonances (see, e.g., Refs. [11][12][13][14][15]). Only a few excited states of such nuclei located beyond the proton drip line are known.…”

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confidence: 99%

Spectroscopy of proton-unbound nuclei by tracking their decay products in-flight: One- and two- proton decays ofF15,Ne

et al. 2010

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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, and 19 Na were investigated by measuring the angular correlations between protons and the respective heavy-ion fragments stemming from the precursor decays in flight. The parent nuclei of interest were produced in nuclear reactions of one-neutron removal from 17 Ne and 20 Mg projectiles at energies of 410-450 A MeV. The trajectories of the respective decay products, 14 O + p + p and 18 Ne + p + p, were measured by applying a tracking technique with microstrip detectors. These data were used to reconstruct the angular correlations of the fragments, which provided information on energies and widths of the parent states. In addition for reproducing properties of known states, evidence for hitherto unknown excited states in 15 F and 16 Ne was found. This tracking technique has an advantage in studies of exotic nuclei beyond the proton drip line measuring the resonance energies and widths with a high precision although by using low-intensity beams and very thick targets.

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Crossing the dripline to11Nusing elastic resonance scattering

Cited by 57 publications

References 29 publications

α-cluster structure ofO18

α-cluster structure ofO18

Two-proton decay of12O and its isobaric analog state in12N

Spectroscopy of proton-unbound nuclei by tracking their decay products in-flight: One- and two- proton decays ofF15,Ne

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