First experiment of 6He with a polarized proton target

Hatano, M.; Sakai, H.; Wakui, Takashi; Uesaka, T.; Aoi, N.; Ichikawa, Y.; Ikeda, T.; Itoh, K.; Iwasaki, H.; Kawabata, T.; Kuboki, H.; Maeda, Y.; Matsui, Naoki; Ohnishi, T.; Onishi, T. K.; Saito, T.; Sakamoto, N.; Sasano, M.; Satou, Y.; Sekiguchi, K.; Suda, K.; Tamii, A.; Yanagisawa, Y.; Yako, K.

doi:10.1140/epjad/i2005-06-110-5

Cited by 30 publications

(51 citation statements)

References 9 publications

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“…[9] in the overlapping angular region. For comparison, data for the p+ 4 He [10] and p+ 6 Li [11] elastic scatterings at 72 MeV/A are also shown by open squares and triangles, respectively. It is found that the dσ/dΩ of p+ 6 He are almost identical with those of p+ 6 Li up to backward angles of θ c.m.…”

Section: P+ 68 He Analyzing Power Measurementmentioning

confidence: 99%

“…There is an additional scale error of 19% on the depth of the spin-orbit potential, which resulted from the uncertainty in the target polarization. 6 He elastic scattering at 71 MeV/A (circles), p+ 4 He at 72 MeV/A (squares) in Ref. [10], and p+ 6 Li at 72 MeV/A (triangles) in Ref.…”

Section: Phenomenological Optical Potentialmentioning

confidence: 99%

“…Thus, it can be concluded that the spin-orbit potentials in neutron-rich helium isotopes are characterized by significantly shallow and slightly long-ranged (for 6 He case) radial dependence. This can be intuitively explained from the largely diffused density distributions of 6 He and 8 He, whose radial gradients are more than twice as small as that of 4 He. …”

Section: Characteristics Of the Spin-orbit Potentialmentioning

confidence: 99%

“…One of the most powerful probes to extract the information on the spin-dependent interaction is the direct reaction induced by spin-polarized light ions. In order to investigate the unstable nuclei with spin polarization, a polarized proton solid target, which was specially designed for radioactive-ion beam experiments, has been developed at CNS, University of Tokyo [1,2,3,4]. The most prominent advantage of this target is in its modest operation conditions, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Elastic Scattering of Neutron-Rich Helium Isotopes from Polarized Protons at 71 MeV/A

Sakaguchi

Uesaka

Kawabata

et al. 2011

J. Phys.: Conf. Ser.

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Abstract. The vector analyzing power has been measured for the elastic scattering of neutronrich 6 He and 8 He from polarized protons at 71 MeV/A making use of a newly constructed solid polarized proton target operated in a low magnetic field of 0.1 T and at a relatively high temperature of 100 K. An optical model analysis revealed that the spin-orbit potentials for 6 He and 8 He are characterized by shallow and long-ranged shape compared with the global systematics of stable nuclei. Such a characteristics reflect a diffused density distribution of the neutron-rich isotopes.

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Section: P+ 68 He Analyzing Power Measurementmentioning

confidence: 99%

Section: Phenomenological Optical Potentialmentioning

confidence: 99%

Section: Characteristics Of the Spin-orbit Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elastic Scattering of Neutron-Rich Helium Isotopes from Polarized Protons at 71 MeV/A

Sakaguchi

Uesaka

Kawabata

et al. 2011

J. Phys.: Conf. Ser.

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“…Investigating the structure of halo nuclei, specifically 6 He, has already inspired a large body of work including few-body models [1], Green's Function Monte Carlo (GFMC) methods [2], and no-core shell model calculations [3], so that ground state properties of 6 He appear to be quite well understood. Recently, elastic scattering of 6 He off a polarized proton target has been measured for the first time at an energy of 71 MeV/nucleon [4,5]. The experiment finds that the analyzing power becomes negative around 50 o which is not predicted by simple folding models for the optical potentials [6,7].…”

Section: Introductionmentioning

confidence: 99%

Elastic scattering of6He based on a cluster description

Weppner

Elster

2012

Phys. Rev. C

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Elastic scattering observables (differential cross section and analyzing power) are calculated for the reaction 6 He(p,p) 6 He at projectile energies starting at 71 MeV/nucleon. The optical potential needed to describe the reaction is derived by describing 6 He in terms of a 4 He-core and two neutrons. The Watson first order multiple scattering ansatz is extended to accommodate the internal dynamics of a composite cluster model for the 6 He nucleus scattering from a nucleon projectile. The calculations are compared with the recent experiments at the projectile energy of 71 MeV/nucleon. In addition, differential cross sections and analyzing powers are calculated at selected higher energies.

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