Direct experimental evidence for a multiparticle-hole ground state configuration of deformed Mg-33

The first direct experimental evidence of a multiparticle-hole ground state configuration of the neutron-rich Mg-33 isotope has been obtained via intermediate energy (400 A MeV) Coulomb dissociation measurement. The major part similar to(70 +/- 13)% of the cross section is observed to populate the excited states of Mg-32 after the Coulomb breakup of Mg-33. The shapes of the differential Coulomb dissociation cross sections in coincidence with different core excited states favor that the valence neutron occupies both the s(1/2) and p(3/2) orbitals. These experimental findings suggest a significant reduction and merging of sd-pf shell gaps at N similar to 20 and 28. The ground state configuration of Mg-33 is predominantly a combination of Mg-32(3.0,3.5MeV; 2(-), 1(-)) circle times nu(s1/2), Mg-32(2.5MeV; 2(+)) circle times nu(p3/2), and Mg-32(0; 0(+)) circle times nu(p3/2). The experimentally obtained quantitative spectroscopic information for the valence neutron occupation of the s and p orbitals, coupled with different core states, is in agreement with Monte Carlo shell model (MCSM) calculation using 3 MeV as the shell gap at N = 20.

Rahaman, A. (author)
Aumann, T. (author)
Beceiro-Novo, S. (author)
Boretzky, K. (author)
Caesar, C. (author)
Carlson, B. V. (author)
Catford, W. N. (author)
Chakraborty, S. (author)
Chartier, M. (author)
Cortina-Gil, D. (author)
de Angelis, G. (author)
Diaz Fernandez, Paloma,1983 (author)
Emling, H. (author)
Ershova, O. (author)
Fraile, L. M. (author)
Geissel, H. (author)
Gonzalez-Diaz, D. (author)
Jonson, Björn,1941Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)bjn (author)
Johansson, Håkan T,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f96hajo (author)
Kalantar-Nayestanaki, N. (author)
Kroll, T. (author)
Krucken, R. (author)
Kurcewicz, J. (author)
Langer, C. (author)
Le Bleis, T. (author)
Leifels, Y. (author)
Marganiec, J. (author)
Munzenberg, G. (author)
Najafi, M. A. (author)
Nilsson, Thomas,1965Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tnilsson (author)
Nociforo, C. (author)
Panin, V. (author)
Paschalis, S. (author)
Plag, R. (author)
Reifarth, R. (author)
Ricciardi, V. (author)
Rossi, D. (author)
Scheit, H. (author)
Scheidenberger, C. (author)
Simon, H. (author)
Taylor, J. T. (author)
Togano, Y. (author)
Typel, S. (author)
Volkov, V. (author)
Wagner, A. (author)
Wamers, F. (author)
Weick, H. (author)
Weigand, M. (author)
Winfield, J. S. (author)
Yakorev, D. (author)
Zoric, M. (author)
Chalmers tekniska högskola (creator_code:org_t)

By the author/editor: Datta, U.; Rahaman, A.; Aumann, T.; Beceiro-Novo, S.; Boretzky, K.; Caesar, C.; show more...; Carlson, B. V.; Catford, W. N.; Chakraborty, S.; Chartier, M.; Cortina-Gil, D.; de Angelis, G.; Diaz Fernandez, ...; Emling, H.; Ershova, O.; Fraile, L. M.; Geissel, H.; Gonzalez-Diaz, D ...; Jonson, Björn, 1 ...; Johansson, Håkan ...; Kalantar-Nayesta ...; Kroll, T.; Krucken, R.; Kurcewicz, J.; Langer, C.; Le Bleis, T.; Leifels, Y.; Marganiec, J.; Munzenberg, G.; Najafi, M. A.; Nilsson, Thomas, ...; Nociforo, C.; Panin, V.; Paschalis, S.; Plag, R.; Reifarth, R.; Ricciardi, V.; Rossi, D.; Scheit, H.; Scheidenberger, ...; Simon, H.; Taylor, J. T.; Togano, Y.; Typel, S.; Volkov, V.; Wagner, A.; Wamers, F.; Weick, H.; Weigand, M.; Winfield, J. S.; Yakorev, D.; Zoric, M.; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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