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Journal Articles Physical Review Letters Year : 2008

Direct Mass Measurement of the Four-Neutron Halo Nuclide He-8

V.L. Ryjkov
  • Function : Author
M. Brodeur
  • Function : Author
T. Brunner
  • Function : Author
M. Smith
  • Function : Author
R. Ringle
  • Function : Author
A. Lapierre
  • Function : Author
F. Ames
  • Function : Author
P. Bricault
  • Function : Author
M. Dombsky
  • Function : Author
P. Delheij
  • Function : Author
D. Lunney
  • Function : Author
M.R. Pearson
  • Function : Author
J. Dilling
  • Function : Author

Abstract

A high-precision Penning trap mass measurement of the exotic (8)He nuclide (T(1/2)=119 ms) has been carried out resulting in a reduction of the uncertainty of the halo binding energy by over an order of magnitude. The new mass, determined with a relative uncertainty of 9.2x10(-8) (delta m=690 eV) is 13 keV less bound than the previously accepted value. The mass measurement is of great relevance for the recent charge-radius measurement of (8)He [P. Mueller , Phys. Rev. Lett. 99, 252501 (2007).]. The (8)He mass is the first result from the newly-commissioned Penning trap: TITAN (TRIUMF's Ion Trap for Atomic and Nuclear science) at the ISAC (Isotope Separator and Accelerator) radioactive beam facility at TRIUMF.
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Dates and versions

in2p3-00825476 , version 1 (23-05-2013)

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V.L. Ryjkov, M. Brodeur, T. Brunner, M. Smith, R. Ringle, et al.. Direct Mass Measurement of the Four-Neutron Halo Nuclide He-8. Physical Review Letters, 2008, 101, pp.012501. ⟨10.1103/PhysRevLett.101.012501⟩. ⟨in2p3-00825476⟩
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