Breakup of<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">Be</mml:mi></mml:math>: Prompt or Delayed?

Bush, J. E.; Hausladen, P. A.; Balamuth, D. P.; Pohl, K. R.; Bazin, D.; Brown, J.; Caggiano, J. A.; Chen, L. L.; Davids, B.; Morrissey, D. J.; Sherrill, B. M.; Thoennessen, M.

doi:10.1103/physrevlett.81.61

Cited by 12 publications

(21 citation statements)

References 14 publications

(19 reference statements)

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confidence: 75%

“…In order to verify the experimental result of Nakamura et al, precise measurements have been done very recently at MSU [11]. In this brief report, we calculate the post-acceleration of the charged fragment 10 Be in the Coulomb dissociation of the halo nucleus 11 Be and compare with the MSU data. We follow the theoretical formalism which was first described in [12] for the Coulomb breakup of a light weakly bound two-body composite nucleus a consisting of a charged core c and a neutral valence particle v on target t at energies of a few tens of MeV per nucleon and above.…”

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confidence: 75%

“…The subject of post-acceleration of the heavy charged core in the breakup of halo nuclei on heavy targets has been a controversial issue [2]. Recent measurements on Coulomb dissociation of 11 Li and 11 Be on heavy targets reveal post-acceleration of the charged cores [3][4][5]. In the measurement of breakup of 11 Li on Pb target at MSU, a clear non-zero velocity difference between 9 Li and the two neutrons has been seen [3].…”

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confidence: 99%

“…Recent measurements on Coulomb dissociation of 11 Li and 11 Be on heavy targets reveal post-acceleration of the charged cores [3][4][5]. In the measurement of breakup of 11 Li on Pb target at MSU, a clear non-zero velocity difference between 9 Li and the two neutrons has been seen [3]. However, this difference has not been observed clearly when the velocities of the 10 Be fragment and the neutron in the final channel have been measured by Nakamura et al at RIKEN, Japan in the breakup of 11 Be on Pb at 72 MeV/nucleon [4].…”

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confidence: 99%

“…In the measurement of breakup of 11 Li on Pb target at MSU, a clear non-zero velocity difference between 9 Li and the two neutrons has been seen [3]. However, this difference has not been observed clearly when the velocities of the 10 Be fragment and the neutron in the final channel have been measured by Nakamura et al at RIKEN, Japan in the breakup of 11 Be on Pb at 72 MeV/nucleon [4]. But significant post-acceleration has been reported by them when the mean longitudinal momentum of 10 Be has been measured as a function of its scattering angle.…”

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confidence: 99%

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Time scale of breakup of the halo nucleus11Be

Banerjee

1999

Phys. Rev. C

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We investigate the post-acceleration of the 10 Be fragment in Coulomb breakup reaction of the halo nucleus 11 Be, assuming that the excitation of the projectile is to states in the low energy continuum. The method used retains all finite-range effects associated with the interactions between the breakup fragments and can use realistic wave functions for the halo nuclei. We apply the method to compute the average momenta of the 10 Be fragment at four different scattering angles following breakup of 11 Be on a Au target at 42 MeV/nucleon beam energy. Our results, which are in qualitative agreement with recent precision experimental data, are consistent with the picture of no post-acceleration effect. The implication is that the breakup takes place on a time-scale long compared to the collision time.PACS numbers: 24.10. Eq, 25.70.Mn Typeset using REVT E X

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confidence: 75%

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confidence: 75%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Time scale of breakup of the halo nucleus11Be

Banerjee

1999

Phys. Rev. C

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A realistic solvable model for the Coulomb dissociation of neutron halo nuclei

Baur

Hencken

Trautmann

2003

Exotic Nuclei and Atomic Masses

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Abstract. As a model of a neutron halo nucleus we consider a neutron bound to an inert core by a zero range force. We study the breakup of this simple nucleus in the Coulomb field of a target nucleus. In the post-form DWBA (or, in our simple model CWBA ("Coulomb Wave Born Approximation")) an analytic solution for the T -matrix is known. We study limiting cases of this T -matrix. As it should be, we recover the Born approximation for weak Coulomb fields (i.e., for the relevant Coulomb parameters much smaller than 1). For strong Coulomb fields, high beam energies, and scattering to the forward region we find a result which is very similar to the Born result. It is only modified by a relative phase (close to 0) between the two terms and a prefactor (close to 1). A similar situation exists for bremsstrahlung emission. This formula can be related to the first order semiclassical treatment of the electromagnetic dissociation. Since our CWBA model contains the electromagnetic interaction between the core and the target nucleus to all orders, this means that higher order effects (including postacceleration effects) are small in the case of high beam energies and forward scattering. Our model also predicts a scaling behavior of the differential cross section, that is, different systems (with different binding energies, beam energies and scattering angles) show the same dependence on two variables x and y. PACS

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Halo Nuclei

Orr

1999

Few-Body Problems in Physics ’98

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Breakup of11Be: Prompt or Delayed?

Cited by 12 publications

References 14 publications

Time scale of breakup of the halo nucleus11Be

Time scale of breakup of the halo nucleus11Be

A realistic solvable model for the Coulomb dissociation of neutron halo nuclei

Halo Nuclei

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