Shape coexistence at the proton drip-line: First identification of   excited states in 180Pb

P. Rahkila (1); D. G. Jenkins (2); J. Pakarinen (3); C. Gray-Jones; (3); P. T. Greenlees (1); U. Jakobsson (1); P. Jones (1); R. Julin (1); S.; Juutinen (1); S. Ketelhut (1); H. Koivisto (1); M. Leino (1); P. Nieminen; (1); M. Nyman (1); P. Papadakis (3); S. Paschalis (3); M. Petri (3); P. Peura; (1); O. J. Roberts (2); T. Ropponen (1); P. Ruotsalainen (1); J. Saren (1),; C. Scholey (1); J. Sorri (1); A. G. Tuff (2); J. Uusitalo (1); R. Wadsworth; (2); M. Bender (4); P.-H. Heenen (5) ((1) University of Jyvaskyla; Finland,; (2) University of York; U.K.; (3) University of Liverpool; U.K.; (4); Universite Bordeaux/CNRS/IN2P3; France; (5) Universite Libre de Bruxelles,; Belgium)

arXiv:1003.0452·nucl-ex·November 20, 2014

Shape coexistence at the proton drip-line: First identification of excited states in 180Pb

P. Rahkila (1), D. G. Jenkins (2), J. Pakarinen (3), C. Gray-Jones, (3), P. T. Greenlees (1), U. Jakobsson (1), P. Jones (1), R. Julin (1), S., Juutinen (1), S. Ketelhut (1), H. Koivisto (1), M. Leino (1), P. Nieminen, (1), M. Nyman (1), P. Papadakis (3), S. Paschalis (3)

PDF

TL;DR

This paper reports the first identification of excited states in the extremely neutron-deficient nucleus 180Pb, revealing insights into shape coexistence at the proton drip-line through advanced in-beam spectroscopy techniques.

Contribution

First experimental observation of excited states in 180Pb, extending understanding of shape coexistence near the proton drip-line with supporting theoretical calculations.

Findings

01

Identification of excited states in 180Pb

02

Prolate minimum continues to rise beyond N=104

03

Reasonable agreement with beyond mean-field calculations

Abstract

Excited states in the extremely neutron-deficient nucleus, 180Pb, have been identified for the first time using the JUROGAM II array in conjunction with the RITU recoil separator at the Accelerator Laboratory of the University of Jyvaskyla. This study lies at the limit of what is presently achievable with in-beam spectroscopy, with an estimated cross-section of only 10 nb for the 92Mo(90Zr,2n)180Pb reaction. A continuation of the trend observed in 182Pb and 184Pb is seen, where the prolate minimum continues to rise beyond the N=104 mid-shell with respect to the spherical ground state. Beyond mean-field calculations are in reasonable correspondence with the trends deduced from experiment.

Peer Reviews

No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.

Videos

No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.