Nuclear
Physics Colloquium
Institute for Theoretical Physics,
Physics Building, Seminar Room PHYS 2.116
Time: Thursday, July 02, 4:30-5:30 pm (s.t.) (plus 10min for
discussion)
Contact: hees@fias.uni-frankfurt.de
Neutron Dripline for Magnesium and
Magnesium-$\Lambda$ hypernuclei
Chhanda Samanta (Virigina Military
Institute)
Nuclear
driplines are limits for nuclear particle-stability. The nuclear physics
of extremely neutron-rich matter has led to the discovery of halo
nuclei, the island of inversion, appearance of new magic numbers and
disappearance of some well-known magic numbers in certain nuclei. In
nuclear astrophysics the neutron-drip lines are limiting boundaries for
explosive nucleosynthesis in which large fluxes of high energy neutrons
can be captured by seed nuclei.
If a Lambda ($\Lambda$)-hyperon is added to a nucleus, it opens up an
additional degree of freedom. Such hypernuclei containing
$\Lambda$-hyperons are of current interest in nuclear as well as
astrophysics. The recent measurements of the mass of neutron-rich
Magnesium nuclei show extra stability approaching the neutron drip line.
The possible drip point for Magnesium is investigated in a microscopic
framework using the Frankfurt chiral effective model. Results of this
calculation and the effect of addition of a $\Lambda$-hyperon on the
neutron-dripline of a Magnesium nucleus will be presented.
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