Investigation of single-particle strength distributions in a high-resolution 40Ca(ovarr|d,p) study at E = 20 MeV

Eckle, F.J.; Lenske, H.; Eckle, G.; Graw, G.; Hertenberger, R.; Kader, H.; Maier, H. J.; Merz, F.; Nann, H.; Schiemenz, P.; Wolter, H.H.

doi:10.1016/0375-9474(90)90382-v

Cited by 64 publications

(34 citation statements)

References 38 publications

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“…The g factor of the ground state was measured to be close to the Schmit value as a single-particle state of 7/2 − [16], which seems consistent with the doubly magic character of 34 Si. …”

Section: Introductionsupporting

confidence: 69%

“…A secondary 34 Si beam was produced by projectile fragmentation of a 63-MeV/nucleon 40 Ar primary beam and was separated by the RIKEN projectile fragment separator (RIPS) [28]. Particle identification of the secondary beam was performed event-by-event by time-offlight (TOF) between the timing signals measured by a plastic scintillator of 0.1 mm thickness located at the second focal plane of RIPS (F2) and the cyclotron rf signals.…”

Section: Methodsmentioning

confidence: 99%

“…The transmission between F2 and the final focal plane was as low as 34% due to multiple scattering in the carbon plate. The 34 Si beam had a typical intensity of 7 × 10 4 particles per second and a purity of 97% at the secondary target. The PPACs were also used to record the positions and angles of the projectiles incident upon the target.…”

Section: Methodsmentioning

confidence: 99%

“…A sudden decrease of the energy of the first 2 + state from 3.33 to 0.88 MeV for 34 Si and 32 Mg [4,6], respectively, suggests that the onset of the deformation starts at 32 Mg, not at 34 Si. More direct evidence was obtained from comparing the enhanced quadrupole collectivities for 32 Mg [3] and 34 Si [7]. In the common picture explaining the shell breaking, there remain problems in the shell structure in this region.…”

Section: Introductionmentioning

confidence: 99%

“…Assuming an isospin symmetry of the nuclear force, neutron single-particle configurations in the nucleus 35 Si are identical to the configuration of protons in corresponding excited states appearing at high excitation energies in the isobaric nucleus 35 P, called isobaric analog states. When the analog state is above the proton separation energy S p , the state is observed in the excitation function of elastic scattering on a target nucleus 34 Si as a resonance, called IAR. The resonance energy E R , spectroscopic factor S, and angular momentum l can be deduced by R-matrix analysis [14,15] on the excitation function of differential cross sections at a given scattering angle.…”

Section: Introductionmentioning

confidence: 99%

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Isobaric analog resonances of theN=21nucleus35Si

et al. 2012

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Neutron single-particle states in the neutron-rich nucleus 35 Si, which is located beside the N = 20 shell breaking nucleus 32 Mg, were investigated through their isobaric analog resonances. The excitation function for 34 Si+p elastic scattering was measured around 0 • in the laboratory frame by the thick target inverse kinematics method with a 34 Si beam around 5 MeV/nucleon and a thick polyethylene target. Eight resonances were successfully observed. Angular momenta and proton and total widths of the resonances were assigned using R-matrix analysis. With the help of information of the β decay study, six isobaric analog resonances were identified. Spectroscopic factors and spin-parities of the corresponding parent states in 35 Si are presented.

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“…The g factor of the ground state was measured to be close to the Schmit value as a single-particle state of 7/2 − [16], which seems consistent with the doubly magic character of 34 Si. …”

Section: Introductionsupporting

confidence: 69%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Isobaric analog resonances of theN=21nucleus35Si

et al. 2012

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20-Calcium

Sukhoruchkin

Soroko

Tables of Excitations From Reactions With Charged Particles. Part 1: Z = 3 - 36

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Exploring the Nα + 3n light nuclei via the (7Li, 7Be) reaction

Nociforo¹,

Cappuzzello²,

Cunsolo³

et al.

The 2nd International Conference on Nuclear Physics in Astrophysics

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Experimental signatures of the dynamical correlations of a core with a single-particle neutron have been found in light neutron-rich nuclei investigated via the ( 7 Li, 7 Be) charge-exchange reactions at around 8 MeV/u. Of particular astrophysical relevance are low-lying narrow resonances (Γ ∼ 200 keV FWHM) BSEC (Bound States Embedded in the Continuum). Because of their long lifetime BSEC states are likely to effect the capture rates in any scenario for nucleosynthesis in neutron-rich environment. They have been observed in the continuum of 11 Be and 15 C nuclei. A microscopic nuclear structure model based on QRPA theory, which takes into account Dynamical Core Polarisation (DCP) correlations, gives a suitable description of these resonances as well as single-particle states of the studied systems. In this context, high-energy narrow structures populated in nuclei having an integer number of α-particles plus three neutrons are good BSEC candidates and can be systematically investigated. PACS. 21.10.Pc Single-particle levels and strength functions -21.60.-n Nuclear structure models and methods -25.70.Kk Charge-exchange reactions -27.20.

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Investigation of single-particle strength distributions in a high-resolution 40Ca(ovarr|d,p) study at E = 20 MeV

Cited by 64 publications

References 38 publications

Isobaric analog resonances of theN=21nucleus35Si

Isobaric analog resonances of theN=21nucleus35Si

20-Calcium

Exploring the Nα + 3n light nuclei via the (7Li, 7Be) reaction

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