Phys. Rev. Lett. 88, 092501 (2002) [5 pages]2868Ni40: Magicity versus Superfluidity |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1974: |
Received 21 December 2000; revised 15 November 2001; published 15 February 2002
The neutron-rich 66,68Ni have been produced at GANIL via interactions of a 65.9A MeV 70Zn beam with a 58Ni target. Their reduced transition probability B(E2;01+→2+) has been measured for the first time by Coulomb excitation in a 208Pb target at intermediate energy. The B(E2) value for 68Ni40 is unexpectedly small. An analysis in terms of large scale shell model calculations stresses the importance of proton core excitations to reproduce the B(E2) values and indicates the erosion of the N = 40 harmonic-oscillator subshell by neutron-pair scattering.
©2002 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v88/e092501
DOI: 10.1103/PhysRevLett.88.092501
PACS: 21.10.Tg, 25.70.Gh, 27.50.+e
* Present address: Department of Physics and Astronomy, University of Manchester, Manchester M139PL, United Kingdom.
† Present address: NSCL, Michigan State University, East Lansing, MI 48824.
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