Skip to Main content Skip to Navigation
Journal articles

First proton-pair breaking in semi-magic nuclei beyond 132Sn and 208Pb: Configuration of the long-lived isomer of 217Pa

A. Astier 1 M. -G. Porquet 1
1 CSNSM SNO
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609
Abstract : The close similarity between the shell structures in the 132Sn and 208Pb regions is a well known phenomenon. Thus, using the correspondence between the high-j orbits located above the Z=50 and Z=82 shell gaps, we discuss the evolutions of the fully aligned states with one broken proton pair in the N=82 and N=126 isotones. A long-lived isomeric state was discovered in 217Pa more than thirty years ago and, despite two other experiments giving new experimental results, the discussions on its main properties (spin, parity, configuration) remained inconclusive. Then, using the comparison with the Iπ=17/2+ isomeric state recently measured in 139La, the isomeric state of 217Pa is assigned as the fully aligned state of the (πh9/2)2(πf7/2)1 configuration.
Document type :
Journal articles
Complete list of metadata

http://hal.in2p3.fr/in2p3-00777109
Contributor : Christine Hadrossek Connect in order to contact the contributor
Submitted on : Wednesday, January 16, 2013 - 5:38:45 PM
Last modification on : Saturday, October 9, 2021 - 4:00:12 AM

Links full text

Identifiers

Collections

Citation

A. Astier, M. -G. Porquet. First proton-pair breaking in semi-magic nuclei beyond 132Sn and 208Pb: Configuration of the long-lived isomer of 217Pa. Physical Review C, American Physical Society, 2013, 87, pp.014309. ⟨10.1103/PhysRevC.87.014309⟩. ⟨in2p3-00777109⟩

Share

Metrics

Record views

134