Measurement of the electric polarizability of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Goeckner, F. C.; Lamm, LO; Knutson, L. D.

doi:10.1103/physrevc.43.66

Cited by 16 publications

(22 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been already directly measured or extracted from experimental data for the 3,4,6 He isotopes [1]. In the case of 3 He it is worth mentioning that the data from elastic scattering on Pb at energies below the Coulomb barrier [8] are in disagreement with estimates based on calculations of the photoabsorption cross section [1], the latter being about a factor of 2 smaller. It is also worth noticing that the theoretical calculations are in agreement with photoabsorption experiments, and that the band spanned by using different Hamiltonians in the calculations is smaller than the difference between the data * rgoerke@physics.utoronto.ca † bacca@triumf.ca ‡ nir@phys.huji.ac.il taken from photoabsorption cross section and ion scattering experiments.…”

Section: Introductionmentioning

confidence: 99%

Nuclear electric polarizability of6He

2012

View full text Add to dashboard Cite

We present an estimate of the nuclear electric polarizability α E of the 6 He halo nucleus based on sixbody microscopic calculations. Wave functions are obtained from semirealistic two-body interactions using the hyperspherical harmonics expansion method. The polarizability is calculated as a sum rule of the dipole response function using the Lanczos algorithm and also by integrating the photoabsorption cross section calculated via the Lorentz integral transform method. We obtain α E = 1.00(14) fm 3 , which is much smaller than the published value α exp E = 1.99(40) fm 3 [Pachucki and Moro, Phys. Rev. A 75, 032521 (2007)] extracted from experimental data. This points toward a potential disagreement between microscopic theories and experimental observations.

show abstract

Section: Introductionmentioning

confidence: 99%

Nuclear electric polarizability of6He

2012

View full text Add to dashboard Cite

show abstract

“…However, the dipole excitation is expected to have a significant effect for nuclei with low break-up thresholds e.g., the deuteron (break-up threshold of 2.2 MeV), 7 Li (break-up threshold of 2.48 MeV) and especially for the halo nuclei 6 He, 11 Li with break-up energies below 1 MeV. Work has been carried out in the past to investigate this effect on the scattering of these weakly bound nuclei from heavy target such as d + 208 Pb [1], 3 He + 208 Pb [2], 7 Li + 208 Pb [3], 6 He + 208 Pb [4,5], and 11 Li + 208 Pb [6]. For the case of d + 208 Pb, 3 He + 208 Pb, and 7 Li + 208 Pb scattering, a high precision measurement was performed to observe a deviation of only 2% from the Rutherford cross-section at backward angles and the dipole polarizabity parameter, α was deduced.…”

Section: Introductionmentioning

confidence: 99%

Untitled

Parkar¹,

Martel²,

Sánchez-Benítez³

et al. 2011

Acta Phys. Pol. B

View full text Add to dashboard Cite

Dipole polarizability, one of the fundamental properties of a nucleus, studied in elastic scattering experiments has been reviewed here. For strongly bound nuclei the effect of dipole polarizability is usually negligible. However, for weakly bound nuclei, where the dipole strength extends to low excitation energies, it does play a major role. This effect has already been examined in the scattering of the lightest weakly-bound stable nuclei, viz., d, 3 He, and 7 Li. In the present work we have studied it for the weakly bound unstable borromean nucleus, 6 He, using the elastic scattering data available at energies around the Coulomb barrier with a 208 Pb target.

show abstract

“…It has to be mentioned that the experimental α E1 value of 3 He determined from elastic scattering on 208 Pb [6] is at variance with the value extracted from photoabsorption experiments.…”

mentioning

confidence: 99%

Photodisintegration of the three-nucleon systems and their polarizabilities

Efros¹,

Leidemann²,

Orlandini³

1997

Physics Letters B

View full text Add to dashboard Cite

The total photodisintegration cross sections of three-body nuclei are calculated with semirealistic NN potentials below pion threshold. Full final state interaction with Coulomb force is taken into account via the Lorentz integral transform method. The experimental total cross sections are well described and the sum rule σ −1 ( 3 H) agrees with elastic electron scattering data. The calculated 3 He polarizability is 0.15 fm 3 .

show abstract

Measurement of the electric polarizability ofHe3

Cited by 16 publications

References 18 publications

Nuclear electric polarizability of6He

Nuclear electric polarizability of6He

Untitled

Photodisintegration of the three-nucleon systems and their polarizabilities

Contact Info

Product

Resources

About