Onset of collectivity in neutron deficient {sup 196,198}Po

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.621· OSTI ID:112950

Bernstein, L A; Cizewski, J A; Jin, H; Younes, W; Henry, R G; Farris, L P; Charos, A; Carpenter, M P; Janssens, R V.F.; Khoo, T L; Lauritsen, T; Bearden, I G; Ye, D; Becker, J A; Henry, E A; Brinkman, M J; Hughes, J R; Kuhnert, A; Wang, T F; Stoyer, M A ; Diamond, R M; Stephens, F S; Deleplanque, M A; Macchiavelli, A O; Lee, I Y; Cederwall, B; Oliveira, J R.B.; Burde, J; Fallon, P; Duyar, C; Draper, J E; Rubel, E; Vo, D T ^[1]

---

1. Rutgers University, New Brunswick, New Jersey 08903 (United States)

We have studied via in-beam {gamma}-ray spectroscopy {sup 196}Po and {sup 198}Po, which are the first neutron-deficient Po isotopes to exhibit a collective low-lying structure. The ratios of yrast state energies and the {ital E}2 branching ratios of transitions from non-yrast to yrast states are indicative of a low-lying vibrational structure. The onset of collective motion in these isotopes can be attributed to the opening of the neutron {ital i}{sub 13/2} orbital at {ital N}{approx}112 and the resulting large overlap between the two valence protons in the {ital h}{sub 9/2} orbital and the valence neutrons in the {ital i}{sub 13/2} orbital.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38; W-7405-ENG-48; AC03-76SF00098
• OSTI ID: 112950
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 52; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
COLLECTIVE EXCITATIONS
E2-TRANSITIONS
GAMMA RADIATION
IN-BEAM SPECTROSCOPY
NEUTRON-DEFICIENT ISOTOPES
POLONIUM 196
POLONIUM 198
VIBRATIONAL STATES
YRAST STATES