Recent News

Evidence for a Doubly Magic 24O
The decay energy spectrum for neutron unbound states in 24O (Z=8, N=16) has been observed for the first time. The resonance energy of the lowest lying state, interpreted as the 2+ level, has been observed at a decay energy above 600 keV. The resulting excitation energy of the 2+ level above 4.7 MeV, supplies strong evidence that 24O is a doubly magic nucleus. The data is also consistent with the presence of a second excited state around 5.33 MeV which can be interpreted as the 1+ level.
Phys. Lett. B 672 (2009) 17

Documentary video of MoNA
A video that provides an overview of the MoNA and the MoNA collaboration has been filmed by the NSCL. Watch the YouTube version below or download the high resolution version here.

Determination of N=16 Shell closure in the Oxygen Drip Line
The first mass measurement of O-25, populated in a one-proton stripping reaction from a secondary 26F beam was made using the MoNA/Sweeper. The size of the N =16 shell gap was determined at the oxygen drip line, and a lowering of the v0d3=2 orbital was observed. Phys. Rev. Lett. 100, 152502 (2008)

Sequential Neutron Decay Spectroscopy Technique Studied
An investigation of potential of sequential neutron decay spectroscopy for the measurement of unbound resonances in neutron-rich nuclei with the MoNA/Sweeper was published in Nuclear Physics A.
Nucl. Phys. A801 101 (2008)

Observation of First Excited State in O-23
New results from the MoNA Collaboration were published in the September 14, 2007 issue of Physical Review Letters . "Selective population and neutron decay of the first excited state of semi-magic O-23"describes the first observation of the neutron unbound first excited state in O-23.
Phys. Rev. Lett. 99, 112501 (2007)

MoNA Move Profiled in Symmetry Magazine
The particle physics magazine Symmetry spotlighted the MoNA's move to the new vault in their August Issue.
Symmetry Vol. 4 Issue 6 Aug. 2007

MoNA/Sweeprer Moved Into a New Vault
The MoNA/Sweeper is being moved into the new vault at the NSCL. The new location will allow greater flexibility in the configuration of the detector. Click here to view a time lapse video of the moving day for the MoNA bars into the new vault. More pictures can be found here.

Collaborators reassemble MoNA in the new
vault location at the NSCL.

Mongol Hordes in Research
A discussion of the "Mongol Horde" model of undergraduate research was presented by the MoNA Collaboration in a Letter to the Editor published in The Chronicle of Higher Education, April 20, 2007.
"Undergraduates as Researchers", Letters, The Chroniocle Review, Vol. 53 ,Issue 33, (April 20, 2007).

January 2007:
MoNA Whitepaper for the Division of Nuclear Physics Town Meeting