Measurements of nuclear radii for neutron-rich Ne isotopes 28−32Ne

Takechi, M.; Ohtsubo, T.; Kuboki, T.; Fukuda, M.; Nishimura, D.; Suzuki, Toshio; Yamaguchi, Takayuki; Ozawa, A.; Moriguchi, T.; Sumikama, T.; Geißel, H.; Aoi, N.; Fukuda, N.; Hachiuma, I.; Inabe, N.; Ishibashi, Yuji; Itoh, Yoshiki; Kameda, D.; Kusaka, K.; Lantz, Mattias; Mihara, M.; Miyashita, Y.; Momota, S.; Namihira, K.; Ohishi, Hiroyuki; Ohkuma, Y.; Ohnishi, T.; Ohtake, M.; Ogawa, K.; Shimbara, Y.; Suda, T.; Suzuki, S.; Takeda, Hiroyuki; Tanaka, K.; Watanabe, Ritsuko; Winkler, M.; Yanagisawa, Y.; Yasuda, Yusuke; Yoshinaga, K.; Yoshida, Akihiro; Yoshida, Kenichi; Kubo, T.

doi:10.1016/j.nuclphysa.2010.01.052

Cited by 33 publications

(42 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, such a structure has been suggested for this isotope by Coulomb breakup studies [22]. This has been further supported by measurements [39] of the interaction cross sections for Ne isotopes incident on a 12 C target at the beam energy of 240 MeV/nucleon, where it was found that for 31 Ne the interaction cross section was much larger than that of any other Ne isotope. Recently, measurements of σ R for 24−38 Mg isotopes on 12 C target at the beam energy of 240 MeV/nucleon have been reported in Ref.…”

Section: Introductionmentioning

confidence: 54%

Coulomb breakup of 37Mg and its ground state structure

et al. 2015

View full text Add to dashboard Cite

We calculate Coulomb breakup of the neutron rich nucleus 37 Mg on a Pb target at the beam energy of 244 MeV/nucleon within the framework of a finite range distorted wave Born approximation theory that is extended to include the effects of projectile deformation. In this theory, the breakup amplitude involves the full wave function of the projectile ground state. Calculations have been carried out for the total one-neutron removal cross section (σ −1n ), the neutron-core relative energy spectrum, the parallel momentum distribution of the core fragment, the valence neutron angular, and energy-angular distributions. The calculated σ −1n has been compared with the recently measured data to put constraints on the spin parity, and the one-neutron separation energy (S n ) of the 37 Mg ground state ( 37 Mg gs ). The dependence of σ −1n on the deformation of this state has also been investigated. While a spin parity assignment of 7/2 − for the 37 Mg gs is ruled out by our study, neither of the 3/2 − and 1/2 + assignments can be clearly excluded. Using the spectroscopic factor of one for both the 3/2 − and 1/2 + configurations and ignoring the projectile deformation effects, the S n valuesEmail addresses: shub1dph@iitr.ac.in (Shubhchintak), nph10dph@iitr.ac.in (Neelam), rcfphfph@iitr.ac.in (R. Chatterjee), radhey.shyam@saha.ac.in (R. Shyam), kazuo.tsushima@gmail.com (K. Tsushima) Preprint submitted to ElsevierMarch 25, 2015 of 0.35±0.06 MeV and 0.50±0.07 MeV, respectively, are extracted for the two configurations. However, the extracted S n is strongly dependent on the spectroscopic factor and the deformation effects of the respective configuration. The narrow parallel momentum distribution of the core fragment and the strong forward peaking of the valence neutron angular distribution suggest a one-neutron halo configuration in either of the 2p 3/2 and 2s 1/2 configurations of the 37 Mg ground state.

show abstract

Section: Introductionmentioning

confidence: 54%

Coulomb breakup of 37Mg and its ground state structure

et al. 2015

View full text Add to dashboard Cite

show abstract

“…They interpreted the large value of Coulomb breakup cross section by considering the valence neutron in 2p 3/2 (for S n ≈ 0.4 MeV) or 2s 1/2 (for S n ≤ 0.8 MeV) and not in 1f 7/2 , as one would have expected from a standard shell model configuration. Recently, Takechi et al, [12,13] measured the interaction cross section, σ I , of 28−32 Ne on 12 C target at 240 MeV/u. They also explained the large value of σ I of 31 Ne by considering sor p-wave valence neutron [13], which is consistent with Ref.…”

Section: Introductionmentioning

confidence: 99%

“…The ground state spin-parity suggested was 3/2 − corresponding to core deformation parameter β 2 ≈ 0.2, even though there was a possibility of J π = 1/2 + with β 2 ≈ 1 or β 2 ≈ −0.4. Takechi et al [21], also analyzed the data [12] by considering the single particle levels in a deformed potential. Using the β 2 value (0.6 ± 0.2) of the core, deduced from the experimental B(E2) data [6], it was suggested that 31 Ne has s-or p-orbital halo structure corresponding to Nilsson level [200 1/2] or [321 3/2], respectively.…”

Section: Introductionmentioning

confidence: 99%

Deformation effects in the Coulomb breakup of 31Ne

Shubhchintak

Chatterjee

2014

Nuclear Physics A

View full text Add to dashboard Cite

We present a fully quantum mechanical theory to study the effects of deformation on various reaction observables in the Coulomb breakup of neutron rich exotic medium mass nuclei on heavy targets within the framework of finite range distorted wave Born approximation by using a deformed Woods-Saxon potential. As an application of this theory, we calculate the one-neutron removal cross section, relative energy spectra, parallel momentum distributions and angular distributions in the breakup of 31 Ne on Pb and Au targets at 234 MeV/u. We suggest ways to put constraints on the large uncertainty in the one-neutron separation energy of 31 Ne and also argue that if 31 Ne is indeed a halo nucleus then it should be a deformed one.

show abstract

“…[9] while we evaluate The experimental data for the reaction cross sections are taken from Ref. [9], while the empirical separation energies are taken from Refs. [41] and [42].…”

Section: Odd-even Staggering Of Reaction Cross Sectionsmentioning

confidence: 99%

“…Experimentally large odd-even staggering (OES) phenomena have been revealed in reaction cross sections of unstable nuclei close to the neutron drip line, for example, in the isotopes 14,15,16 C [8], 18,19,20 C [3], 28,29,30 Ne [9], 30,31,32 Ne [9], and 36,37,38 Mg [10]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Pairing correlations and odd-even staggering in reaction cross sections of weakly bound nuclei

Hagino

Sagawa

2012

Phys. Rev. C

View full text Add to dashboard Cite

We investigate the odd-even staggering (OES) in reaction cross sections of weakly bound nuclei with Glauber theory, taking into account the pairing correlation with the Hartree-Fock-Bogoliubov (HFB) method. We first discuss the pairing gap in extremely weakly bound nuclei and show that the pairing gap persists in the zero separation energy limit even for single-particle orbits with the orbital angular momenta l = 0 and l = 1. We then introduce the OES parameter, defined as the second derivative of reaction cross sections with respect to the mass number, and clarify the relation between the magnitude of OES and the neutron separation energy. We find that the OES parameter increases considerably in the zero separation energy limit for l = 0 and l = 1 single-particle states, while no increase is found for higher angular momentum orbits with, for example, l = 3. We point out that the increase of OES parameter is also seen in the experimental reaction cross sections for Ne isotopes, which is well accounted for by our calculations.

show abstract

Measurements of nuclear radii for neutron-rich Ne isotopes 28−32Ne

Cited by 33 publications

References 14 publications

Coulomb breakup of 37Mg and its ground state structure

Coulomb breakup of 37Mg and its ground state structure

Deformation effects in the Coulomb breakup of 31Ne

Pairing correlations and odd-even staggering in reaction cross sections of weakly bound nuclei

Contact Info

Product

Resources

About